chore(release): prepare v0.20.0-beta.2

.github/workflows/quality-gate.yml

@@ -29,6 +29,9 @@ jobs:
       - name: Verify Windows launcher bootstrap
         run: bun test src/main/runtime/windows-launcher-bootstrap.test.ts
 
+      - name: Verify native mpv process launch
+        run: bun test src/main/runtime/mpv-process.test.ts
+
       - name: Verify POSIX launcher bootstrap
         run: bun test src/main/runtime/posix-launcher-bootstrap.test.ts
 

changes/jellyfin-configured-mpv-docs.md

@@ -0,0 +1,4 @@
+type: docs
+area: jellyfin
+
+- Clarify that Windows mpv playback and Jellyfin casting can use a configured executable path instead of PATH.

changes/jellyfin-configured-mpv.md

@@ -0,0 +1,4 @@
+type: fixed
+area: jellyfin
+
+- Honor the configured mpv executable when Jellyfin starts playback, allowing casting when mpv is installed outside PATH, and detect portable plugins beside the selected executable.

changes/sentence-furigana.md

@@ -0,0 +1,4 @@
+type: fixed
+area: anki
+
+- Keep word-card sentence furigana in sync with full stats-search context and expanded timing-review selections. Clear stale readings if regeneration fails.

changes/subtitle-selection-docs.md

@@ -0,0 +1,4 @@
+type: docs
+area: config
+
+- Documented the subtitle selector setting, shortcut override, and primary/secondary track controls.

changes/subtitle-selection.md

@@ -0,0 +1,5 @@
+type: added
+area: overlay
+
+- Added an optional Catppuccin subtitle selection modal for primary and secondary mpv tracks. Enable it in Settings under Behavior, then press g followed by s. Disabling it restores mpv's subtitle selection binding.
+- Single-key actions take priority over configured sequence prefixes. Conflicting sequences are disabled with a warning, and the existing y commands stay reserved.

config.example.jsonc

@@ -6,6 +6,15 @@
  */
 {
 
+  // ==========================================
+  // Subtitle Selection
+  // Select primary and secondary mpv subtitle tracks from the overlay.
+  // Hot-reload: enabling or disabling updates the session shortcut immediately.
+  // ==========================================
+  "subtitleSelection": {
+    "enabled": false // Use the SubMiner modal to select primary and secondary subtitle tracks. When enabled, its shortcut overrides mpv subtitle selection. Values: true | false
+  }, // Select primary and secondary mpv subtitle tracks from the overlay.
+
   // ==========================================
   // Japanese Subtitle Generation
   // Generate timed Japanese subtitles from local audio using whisper.cpp.
@@ -223,6 +232,7 @@
     "openRuntimeOptions": "CommandOrControl+Shift+O", // Accelerator that opens the runtime options modal.
     "openJimaku": "Ctrl+Shift+J", // Accelerator that opens the Jimaku subtitle search modal.
     "openTsukihime": "Ctrl+Shift+T", // Accelerator that opens the TsukiHime subtitle search modal (configured secondary/Japanese primary tabs).
+    "openSubtitleSelection": "g-s", // Open subtitle selection when enabled. Use g-s to press g then s. Set null to unbind.
     "openSubtitleGeneration": "Ctrl+Shift+G", // Accelerator that opens the standalone Japanese subtitle generation modal.
     "openSessionHelp": "CommandOrControl+Slash", // Accelerator that opens the session help / keybinding cheatsheet.
     "openControllerSelect": "Alt+C", // Accelerator that opens the controller selection and learn-mode modal.

docs-site/anki-integration.md

@@ -212,6 +212,8 @@ Confirming writes the combined lines to the sentence field. Reset drops the adde
 
 **Canceling.** You can go back to editing, finish with the original timing, create the card without audio or an image, or discard it. Discard deletes an existing Yomitan or audio card, and skips creation entirely for a direct sentence card. A failed audio preview does not block confirmation or card creation.
 
+When word-card enrichment changes the sentence context, including an expanded timing-review selection, SubMiner regenerates `SentenceFurigana` from the final sentence. Unchanged sentences keep their existing furigana formatting. If generation fails, SubMiner clears stale furigana so compatible templates can fall back to `Sentence`.
+
 Clipboard updates and stats-dashboard mining never open timing review. The option is off by default and hot-reloads. **Review Media Timing** in the runtime options palette (`Ctrl/Cmd+Shift+O`) toggles it for the current session.
 
 If SubMiner closes the overlay while a timing review is still loading, it cancels pending setup and modal retries and restores playback if the review paused it. A new timing review can start after the overlay reopens.

docs-site/configuration.md

@@ -1117,6 +1117,14 @@ When the manual merge popup opens, SubMiner pauses playback and closes any open
 
 <a :href="withBase('/assets/kiku-integration.webm')" target="_blank" rel="noreferrer">Open demo in a new tab</a>
 
+## Subtitle Selection
+
+Enable **Settings → Behavior → Subtitle Selection → Enabled** to choose mpv's primary and secondary subtitle tracks from a SubMiner modal. The feature is disabled by default. The dialog uses the same overlay focus and subtitle suppression behavior as the other modals.
+
+Press `g` then `s` to open it. Both selectors include **None**. Choose different tracks and click **Apply** to load them into mpv, or close the dialog to keep the current selection. Embedded and already-loaded external subtitle tracks are listed with their title, language, and codec when available.
+
+`subtitleSelection.enabled` controls the feature. `shortcuts.openSubtitleSelection` changes its shortcut, or accepts `null` to unbind it. Enabling the feature overrides mpv's binding for that shortcut when its first key is free; disabling it restores mpv's binding. Existing single-key actions take priority over sequences; see [shortcut conflicts](/shortcuts). Both settings apply immediately. See the [generated configuration example](/config.example.jsonc) for defaults.
+
 ## External integrations
 
 ### Jimaku

docs-site/immersion-tracking.md

@@ -152,7 +152,7 @@ Stats server config lives under `stats`:
 
 The Search tab and the Vocabulary tab's word detail panel both mine from subtitle lines in your viewing history. Search matches sentence text and media titles, and **Search by headword** is enabled by default so dictionary-form searches such as `知らない` can find tracked subtitle lines with inflected variants. Turn that toggle off for exact text/title matching only. Each line with a valid source file offers sentence-card mining; word/audio mining is available when the selected word or searched word appears in the sentence:
 
-- **Mine Word** - performs a full Yomitan dictionary lookup for the word (definition, reading, pitch accent, etc.) via a short-lived hidden helper, then enriches the card with sentence audio, a screenshot or animated AVIF clip, the highlighted sentence, and metadata extracted from the source video file. Requires Anki and Yomitan dictionaries to be loaded.
+- **Mine Word** - performs a full Yomitan dictionary lookup for the word (definition, reading, pitch accent, etc.) via a short-lived hidden helper, then enriches the card with sentence audio, a screenshot or animated AVIF clip, the highlighted sentence, full-sentence readings in `SentenceFurigana` when that field exists, and metadata extracted from the source video file. Requires Anki and Yomitan dictionaries to be loaded.
 - **Mine Sentence** - creates a sentence card directly with the `IsSentenceCard` flag set (for Lapis/Kiku workflows), along with audio and image from the source video.
 - **Mine Audio** - creates an audio-only card with the `IsAudioCard` flag, attaching only the sentence audio clip.
 

docs-site/installation.md

@@ -120,10 +120,10 @@ pip install ffsubsync
 
 Windows 10 or later. No compositor tools or window helpers are needed - native window tracking is built in.
 
-You need **mpv** (required) and **ffmpeg** (strongly recommended, for card audio and screenshots), and both must be on your `PATH`.
+You need **mpv** (required) and **ffmpeg** (strongly recommended, for card audio and screenshots). Put mpv on `PATH` or set `mpv.executablePath` during setup. ffmpeg must be on `PATH`.
 
 ::: tip What is PATH?
-`PATH` is the list of folders Windows searches when a program asks to run another program by name. SubMiner runs `mpv` and `ffmpeg` by name, so if their folders are not on `PATH`, SubMiner cannot find them even though they are installed. The routes below mostly handle `PATH` for you; the manual route explains how to add a folder yourself.
+`PATH` is the list of folders Windows searches when a program asks to run another program by name. SubMiner uses it to find ffmpeg and, unless an executable path is configured, mpv. The routes below mostly handle `PATH` for you; the manual route explains how to add a folder yourself.
 :::
 
 You can install these with a package manager or by hand. Coverage differs, so pick based on what you need:

docs-site/jellyfin-integration.md

@@ -50,6 +50,7 @@ From then on, pause / resume / seek / stop and audio or subtitle track changes y
 ## What happens during playback
 
 - **mpv launches automatically.** If mpv isn't already running when you cast, SubMiner starts it with SubMiner defaults and the bundled mpv plugin, so keybindings work right away.
+- **Windows respects your mpv settings.** Casting checks `mpv.executablePath`, then `SUBMINER_MPV_PATH`, then `PATH`. An invalid configured path prevents automatic startup.
 - **The overlay is managed by SubMiner,** so your configured `subtitleStyle` controls how subtitles look. Use the [overlay-toggle shortcut](/shortcuts) to hide it for a session.
 - **Resume works.** If Jellyfin has a saved position for the item, SubMiner seeks there on load.
 - **Titles and credentials stay separate.** AniList, character dictionaries, Anki source fields, and Discord presence use media titles, never authenticated stream URLs. If a usable title is unavailable, lookups are skipped and source fields show an unknown-media label. Stats identifies Jellyfin videos by server and item ID without the stream URL or API key.

docs-site/public/config.example.jsonc

@@ -6,6 +6,15 @@
  */
 {
 
+  // ==========================================
+  // Subtitle Selection
+  // Select primary and secondary mpv subtitle tracks from the overlay.
+  // Hot-reload: enabling or disabling updates the session shortcut immediately.
+  // ==========================================
+  "subtitleSelection": {
+    "enabled": false // Use the SubMiner modal to select primary and secondary subtitle tracks. When enabled, its shortcut overrides mpv subtitle selection. Values: true | false
+  }, // Select primary and secondary mpv subtitle tracks from the overlay.
+
   // ==========================================
   // Japanese Subtitle Generation
   // Generate timed Japanese subtitles from local audio using whisper.cpp.
@@ -223,6 +232,7 @@
     "openRuntimeOptions": "CommandOrControl+Shift+O", // Accelerator that opens the runtime options modal.
     "openJimaku": "Ctrl+Shift+J", // Accelerator that opens the Jimaku subtitle search modal.
     "openTsukihime": "Ctrl+Shift+T", // Accelerator that opens the TsukiHime subtitle search modal (configured secondary/Japanese primary tabs).
+    "openSubtitleSelection": "g-s", // Open subtitle selection when enabled. Use g-s to press g then s. Set null to unbind.
     "openSubtitleGeneration": "Ctrl+Shift+G", // Accelerator that opens the standalone Japanese subtitle generation modal.
     "openSessionHelp": "CommandOrControl+Slash", // Accelerator that opens the session help / keybinding cheatsheet.
     "openControllerSelect": "Alt+C", // Accelerator that opens the controller selection and learn-mode modal.

docs-site/shortcuts.md

@@ -88,6 +88,7 @@ Mouse-hover playback behavior is configured separately from shortcuts: `subtitle
 | `Ctrl+Shift+T`     | Open TsukiHime subtitle search modal (EN/JA tabs)       | `shortcuts.openTsukihime`                 |
 | `Ctrl/Cmd+N`       | Toggle overlay notification history panel                | `shortcuts.toggleNotificationHistory`      |
 | `Ctrl+Alt+C`       | Open the manual YouTube subtitle picker                  | `keybindings`                              |
+| `g` then `s`       | Select primary and secondary subtitles, when enabled     | `shortcuts.openSubtitleSelection`                                                               |
 | `Ctrl+Alt+S`       | Open subtitle sync (subsync) modal                       | `shortcuts.triggerSubsync`                 |
 | `Ctrl/Cmd+A`       | Append clipboard video path to mpv playlist              | `shortcuts.appendClipboardVideoToQueue`    |
 | `\`                | Toggle subtitle sidebar                                  | `subtitleSidebar.toggleKey` (overlay) / `shortcuts.toggleSubtitleSidebar` (mpv session binding) |
@@ -98,6 +99,8 @@ Mouse-hover playback behavior is configured separately from shortcuts: `subtitle
 
 The stats toggle is handled inside the focused visible overlay window. It is configurable through the top-level `stats.toggleKey` setting and defaults to `Backquote`.
 
+Enable the subtitle selector in **Settings → Behavior → Subtitle Selection**. Its shortcut overrides mpv subtitle selection only while enabled. In the focused overlay, press the second key within one second. Single-key bindings take priority: if `g` already has an action in SubMiner or mpv, `g-s` is disabled with a conflict warning, and `g` still runs immediately. Remap the sequence or remove the conflicting single-key binding. The existing `y` prefix is reserved for its built-in commands. mpv bindings are checked on connection, configuration changes, and overlay focus; refresh the overlay after changing another script's bindings. See [subtitle selection](/configuration#subtitle-selection).
+
 The subtitle sidebar toggle is overlay-local and only opens when SubMiner has a parsed cue list for the active subtitle source.
 
 In the sidebar, `Enter` seeks the keyboard-focused cue. `Space` keeps its configured playback action, normally pause/resume, even when a cue has focus.

docs/architecture/README.md

@@ -35,6 +35,8 @@ Update checks and startup launcher migration share a serialized update-state sto
 - `src/core/services/subtitle-generation*.ts` shares local whisper.cpp transcription, safe model downloads, and progress between the launcher and Electron. Optional dialogue mode retains both Silero-detected speech and other audible sections, omits confidently silent gaps, decodes passages independently, and restores original media timing. `src/main/runtime/subtitle-generation-runtime.ts` owns the overlay job lifecycle and only loads completed subtitles into the same local media; `src/shared/subtitle-generation*.ts` owns configuration, the multilingual model catalog, and IPC contracts. The overlay runtime retains a session model selection, validates picker requests through IPC, and keeps external model paths authoritative.
 - Subtitle model recommendations use bounded `nvidia-smi` and Whisper CUDA discovery probes in `subtitle-generation-acceleration.ts`. The overlay runtime caches results by executable path for 30 seconds and exposes acceleration status through the existing status IPC. Recommendations do not alter model selection or transcription arguments.
 - `subtitle-generation-reference.ts` ranks mpv's loaded text subtitle tracks, excludes signs/songs and forced references, and extracts timing hints with FFmpeg. The overlay and launcher snapshot references only for matching media, including active subtitle delays. Hints guide long-passage cuts with or without VAD; they never limit audio coverage or replace Whisper timestamps.
+- `src/main/runtime/subtitle-selection.ts` reads and validates mpv subtitle tracks and applies primary/secondary selections. Its opt-in session shortcut opens the shared overlay modal window, with renderer focus and subtitle suppression handled by the modal registry.
+- `src/shared/session-key-sequences.ts` rejects sequence prefixes reserved by single-key actions. The session-binding compiler reserves configured and built-in overlay keys; `src/main/runtime/session-bindings-runtime.ts` adds active mpv bindings and publishes the effective list to both the plugin artifact and the renderer through `session-bindings:changed`. mpv no-op `ignore` bindings do not reserve prefixes.
 - `src/renderer/` owns overlay rendering and input behavior.
 - `src/config/` owns config definitions, defaults, loading, and resolution.
 - `src/types/` owns shared cross-runtime contracts via domain entrypoints; `src/types.ts` stays a compatibility barrel.

docs/architecture/domains.md

@@ -21,6 +21,7 @@ Read when: you need to find the owner module for a behavior or test surface
   `src/config/resolve/anki-connect/`
 - Overlay/window state: `src/core/services/overlay-*`, `src/main/overlay-*.ts`
 - MPV runtime and protocol: `src/core/services/mpv*.ts`
+  Windows executable lookup and detached process creation are shared in `src/main/runtime/mpv-process.ts`. The Windows launcher and Jellyfin handlers retain their own playback and connection workflows.
 - Subtitle/token pipeline: `src/core/services/subtitle-*.ts`, `src/core/services/tokenizer*`, `src/core/services/tokenizer/`, `src/subsync/`
 - Anki workflow: `src/anki-integration/`, `src/core/services/anki-jimaku*.ts`
 - Immersion tracking: `src/core/services/immersion-tracker/`

package.json

@@ -2,7 +2,7 @@
   "name": "subminer",
   "productName": "SubMiner",
   "desktopName": "SubMiner.desktop",
-  "version": "0.20.0-beta.1",
+  "version": "0.20.0-beta.2",
   "description": "All-in-one sentence mining overlay with AnkiConnect and dictionary integration",
   "packageManager": "bun@1.3.5",
   "main": "dist/main-entry.js",

plugin/subminer/session_bindings.lua

@@ -91,6 +91,10 @@ function M.create(ctx)
 	end
 
 	local function key_code_to_mpv_name(code)
+		local first, second = code:match("^Key([A-Z])%-Key([A-Z])$")
+		if first and second then
+			return string.lower(first) .. "-" .. string.lower(second)
+		end
 		if KEY_NAME_MAP[code] then
 			return KEY_NAME_MAP[code]
 		end
@@ -187,6 +191,110 @@ function M.create(ctx)
 		return bindings
 	end
 
+	-- Match letter strokes, including mpv's uppercase spelling for Shift.
+	local function letter_key_signature(value)
+		if type(value) ~= "string" then
+			return nil
+		end
+		local modifiers = {}
+		while true do
+			local modifier, rest = value:match("^([%a]+)%+(.+)$")
+			if not modifier then
+				break
+			end
+			modifier = string.lower(modifier)
+			if not MODIFIER_MAP[modifier] then
+				return nil
+			end
+			modifiers[modifier] = true
+			value = rest
+		end
+		if not value:match("^[a-zA-Z]$") then
+			return nil
+		end
+		if value:match("^[A-Z]$") then
+			modifiers.shift = true
+		end
+		local parts = {}
+		for _, modifier in ipairs({ "ctrl", "alt", "shift", "meta" }) do
+			if modifiers[modifier] then
+				parts[#parts + 1] = modifier
+			end
+		end
+		parts[#parts + 1] = string.lower(value)
+		return table.concat(parts, "+")
+	end
+
+	local function external_single_keys()
+		local keys = {}
+		local native = mp.get_property_native and mp.get_property_native("input-bindings") or {}
+		for _, entry in ipairs(native or {}) do
+			local signature = letter_key_signature(entry.key)
+			if
+				signature
+				and type(entry.cmd) == "string"
+				and type(entry.priority) == "number"
+				and entry.priority >= 0
+			then
+				local owned = entry.owner == "subminer"
+					or (
+						entry.owner == nil
+						and (
+							entry.cmd:match("script%-binding%s+['\"]?subminer/")
+							or entry.cmd:match("script%-message%s+['\"]?subminer%-")
+						)
+					)
+				local previous = keys[signature]
+				if
+					not previous
+					or entry.priority > previous.priority
+					or (entry.priority == previous.priority and owned)
+				then
+					local command = entry.cmd:match("^%s*(.-)%s*$")
+					local flags = {
+						["no-osd"] = true,
+						["osd-bar"] = true,
+						["osd-msg"] = true,
+						["osd-msg-bar"] = true,
+						["osd-auto"] = true,
+						["expand-properties"] = true,
+						["raw"] = true,
+						["repeatable"] = true,
+						["nonrepeatable"] = true,
+						["nonscalable"] = true,
+						["async"] = true,
+						["sync"] = true,
+					}
+					while true do
+						local flag, rest = command:match("^(%S+)%s+(.+)$")
+						if not flags[flag] then
+							break
+						end
+						command = rest
+					end
+					keys[signature] = { priority = entry.priority, owned = owned, ignored = command == "ignore" }
+				end
+			end
+		end
+		return keys
+	end
+
+	local function sequence_conflict(binding, singles)
+		local code = binding.key and binding.key.code
+		local prefix = type(code) == "string" and code:match("^(Key[A-Z])%-Key[A-Z]$")
+		if not prefix then
+			return nil
+		end
+		local names = key_spec_to_mpv_bindings({ code = prefix, modifiers = binding.key.modifiers }) or {}
+		for _, name in ipairs(names) do
+			local existing = singles[letter_key_signature(name)]
+			if existing and not existing.owned and not existing.ignored then
+				return name
+			end
+		end
+		return nil
+	end
+
 	local function normalize_cli_args(cli_args)
 		if type(cli_args) ~= "table" then
 			return nil
@@ -391,17 +499,23 @@ function M.create(ctx)
 		local next_binding_names = {}
 		state.session_binding_generation = (state.session_binding_generation or 0) + 1
 		local generation = state.session_binding_generation
+		local singles = external_single_keys()
 
 		for index, binding in ipairs(artifact.bindings) do
 			if not is_supported_binding(binding) then
-				subminer_log(
-					"warn",
-					"session-bindings",
-					"Skipped unsupported session binding from artifact"
-				)
+				subminer_log("warn", "session-bindings", "Skipped unsupported session binding from artifact")
 			else
 				local key_names = key_spec_to_mpv_bindings(binding.key)
-				if key_names then
+				local conflict = sequence_conflict(binding, singles)
+				if conflict then
+					local message = "Disabled sequence "
+						.. tostring(binding.originalKey or binding.key.code)
+						.. ": mpv already uses "
+						.. conflict
+						.. ". Single-key bindings take priority."
+					subminer_log("warn", "session-bindings", message)
+					show_osd(message)
+				elseif key_names then
 					for key_index, key_name in ipairs(key_names) do
 						local name = "subminer-session-binding-"
 							.. tostring(generation)
@@ -418,7 +532,8 @@ function M.create(ctx)
 					subminer_log(
 						"warn",
 						"session-bindings",
-						"Skipped unsupported key code from artifact: " .. tostring(binding.key and binding.key.code or "unknown")
+						"Skipped unsupported key code from artifact: "
+							.. tostring(binding.key and binding.key.code or "unknown")
 					)
 				end
 			end

release/prerelease-notes.md

@@ -1,8 +1,16 @@
 > This is a prerelease build for testing. Stable changelog and docs-site updates remain pending until the final stable release.
 
-<!-- prerelease-version: 0.20.0-beta.1 -->
+<!-- prerelease-version: 0.20.0-beta.2; since: v0.20.0-beta.1 -->
+
+## Changes since v0.20.0-beta.1
+
+- Added an optional subtitle selection modal for primary and secondary mpv subtitle tracks. Enable it in Settings > Behavior, then press `g` followed by `s`. Disabling it restores mpv's subtitle selection binding.
+  - Single-key shortcut actions now take priority over configured multi-key sequence prefixes, conflicting sequences are disabled with a warning, and existing `y` commands remain reserved.
+- Jellyfin casting and playback now honor a configured mpv executable path, allowing playback when mpv is installed outside the system PATH, and portable plugins located beside that executable are now detected.
+- Fixed word-card sentence furigana falling out of sync with full stats-search context and expanded timing-review selections; stale furigana is now cleared if regeneration fails.
 
 ## Highlights
+
 ### Added
 
 - **Japanese Subtitle Generation**:
@@ -17,6 +25,11 @@
 
 - **Overlay Keybinding Pickup**: The overlay now recognizes your mpv keybindings (from mpv's defaults, `input.conf`, and loaded scripts) as long as they don't conflict with SubMiner's own controls. Picked-up bindings work for the session but won't show up in the help menu.
 
+- **Subtitle Selection Modal**:
+  - An optional subtitle selection modal lets you pick primary and secondary mpv subtitle tracks without leaving the overlay.
+  - Enable it in Settings under Behavior, then trigger it with `g` followed by `s`; turning it off restores mpv's normal subtitle selection binding.
+  - Single-key shortcuts always take priority over multi-key sequences, and any conflicting sequence is disabled with a warning instead of misbehaving.
+
 - **Subtitle Sidebar Selection & Copy**: You can now select dialogue across multiple subtitle sidebar rows and copy it, without timestamps, using Ctrl/Cmd+C or the Copy button, without seeking or mining a card.
 
 - **Jimaku Live Action Search**: The Jimaku modal has separate Anime and Live Action tabs (switch with Arrow Left/Right) so you can search Jimaku's live-action subtitle catalogue directly.
@@ -47,6 +60,7 @@
 - **Jellyfin**:
   - Playback, subtitles, artwork, and remote control now authenticate with an `ApiKey` parameter instead of legacy headers, so Jellyfin 12 works correctly even with legacy authorization disabled.
   - "Play on SubMiner" no longer silently drops the connection after about a minute on Jellyfin 12.
+  - Casting now honors your configured mpv executable path, so playback works and portable plugins are detected correctly when mpv isn't on PATH.
   - The "now playing" bar clears when you close or finish a cast video instead of running to the end of the episode.
   - Anki cards mined from Jellyfin now get the real episode title in the misc info field instead of "Unknown media".
   - Jellyfin streams no longer leak URL-derived titles or credential-bearing URLs into metadata, Anki fields, Discord presence, stats, or AniList lookups; previously cached data that had credentials in it is cleaned up automatically.
@@ -55,6 +69,7 @@
   - Word audio now reads from its own configured field (`ankiConnect.fields.wordAudio`) instead of the sentence-audio field, fixing animated word images that started moving immediately instead of on demand.
   - Setting `ankiConnect.media.maxMediaDuration` to `0` for unlimited duration now also applies when mining from the stats dashboard, matching overlay mining.
   - Closing the overlay while a media timing review is still loading now properly cancels setup, restores playback if the review had paused it, and cleans up the hidden preview player.
+  - Word-card sentence furigana now stays in sync with the full stats-search context and expanded timing-review selections, and clears stale readings automatically if regeneration fails.
 
 - **Settings**:
   - AnkiConnect, Kiku, and Senren settings are now validated before use, with a warning and a safe default for anything invalid instead of a bad value reaching runtime.
@@ -98,6 +113,9 @@
 - fix(overlay): cancel pending window transitions and timing reviews by @ksyasuda in #262
 - fix(stats): restrict local requests and serve the dashboard over HTTP by @ksyasuda in #263
 - fix(jellyfin): support modern authentication by @ksyasuda in #264
+- feat(overlay): add optional subtitle selection modal by @ksyasuda in #265
+- fix(jellyfin): respect Windows mpv configuration when casting by @aalhendi in #267
+- fix(anki): regenerate sentence furigana from the final sentence by @ksyasuda in #268
 
 ## New Contributors
 

scripts/test-plugin-session-bindings.lua

@@ -69,6 +69,12 @@ local ctx = {
 			return {
 				numericSelectionTimeoutMs = 3000,
 				bindings = {
+					{
+						key = { code = "KeyG-KeyS", modifiers = {} },
+						actionType = "session-action",
+						actionId = "openSubtitleSelection",
+						cliArgs = { "--session-action", '{"actionId":"openSubtitleSelection"}' },
+					},
 					{
 						key = {
 							code = "KeyO",
@@ -312,7 +318,8 @@ local ctx = {
 						cliArgs = { "--session-action", '{"actionId":"openFuturePanel"}' },
 					},
 				},
-			}, nil
+			},
+				nil
 		end,
 	},
 	state = {
@@ -430,17 +437,11 @@ assert_true(play_next_call ~= nil, "play-next binding should invoke CLI action")
 assert_true(play_next_call[2] == "--play-next-subtitle", "play-next binding should pass CLI flag")
 
 local character_dictionary_manager = find_binding("Ctrl+d")
-assert_true(
-	character_dictionary_manager ~= nil,
-	"character dictionary manager binding should be registered"
-)
+assert_true(character_dictionary_manager ~= nil, "character dictionary manager binding should be registered")
 
 character_dictionary_manager.fn()
 local character_dictionary_manager_call = recorded.async_calls[#recorded.async_calls]
-assert_true(
-	character_dictionary_manager_call ~= nil,
-	"character dictionary manager binding should invoke CLI action"
-)
+assert_true(character_dictionary_manager_call ~= nil, "character dictionary manager binding should invoke CLI action")
 assert_true(
 	character_dictionary_manager_call[2] == "--session-action",
 	"character dictionary manager binding should use generic session action CLI flag"
@@ -474,3 +475,35 @@ assert_true(call[2] == "--mine-sentence-multiple", "CLI action should enter mine
 assert_true(call[3] == nil, "CLI action should not bind a plugin-side digit count")
 
 print("plugin session binding regression tests: OK")
+
+local selector = find_binding("g-s")
+assert_true(selector ~= nil, "subtitle selection should override mpv g-s with a forced sequence")
+selector.fn()
+local selection_call = recorded.async_calls[#recorded.async_calls]
+assert_true(
+	selection_call[3] == '{"actionId":"openSubtitleSelection"}',
+	"subtitle selection should dispatch its session action"
+)
+
+local native_bindings = {}
+function mp.get_property_native(name)
+	assert_true(name == "input-bindings", "only native input bindings should be queried")
+	return native_bindings
+end
+
+for _, case in ipairs({
+	{ key = "g", priority = 1, enabled = false },
+	{ key = "G", priority = 1, enabled = true },
+	{ key = "Shift+g", priority = 1, enabled = true },
+	{ key = "Ctrl+g", priority = 1, enabled = true },
+	{ key = "g", priority = -1, enabled = true },
+	{ key = "g", priority = 1, cmd = "ignore", enabled = true },
+	{ key = "g", priority = 1, cmd = "no-osd ignore", enabled = true },
+}) do
+	native_bindings = { { key = case.key, cmd = case.cmd or "show-text single", priority = case.priority } }
+	recorded.bindings = {}
+	assert_true(bindings.reload_bindings(), "binding reload should succeed")
+	assert_true((find_binding("g-s") ~= nil) == case.enabled, "sequence prefix conflict: " .. case.key)
+end
+assert_true(#recorded.osd > 0, "native prefix conflicts should be visible")
+print("plugin sequence conflict tests: OK")

src/anki-integration.ts

@@ -243,6 +243,9 @@ export class AnkiIntegration {
   private recordCardsMinedCallback: ((count: number, noteIds?: number[]) => void) | null = null;
   private knownWordCacheUpdatedCallback: (() => void) | null = null;
   private consumeSubtitleMiningContextCallback: (() => SubtitleMiningContext | null) | null = null;
+  private generateSentenceFuriganaCallback:
+    | ((text: string, highlightedText?: string) => Promise<string | null>)
+    | null = null;
   private mediaTimingReviewCallback:
     | ((request: MediaTimingReviewRequest) => Promise<MediaTimingReviewDecision>)
     | null = null;
@@ -666,6 +669,13 @@ export class AnkiIntegration {
       processSentence: (mpvSentence, noteFields) => this.processSentence(mpvSentence, noteFields),
       processSentenceFurigana: (sentenceFurigana, noteFields) =>
         this.processSentenceFurigana(sentenceFurigana, noteFields),
+      generateSentenceFurigana: async (text, noteFields) =>
+        this.generateSentenceFuriganaCallback?.(
+          text,
+          this.config.behavior?.highlightWord === false
+            ? undefined
+            : this.getSentenceHighlightText(noteFields),
+        ) ?? null,
       setCardTypeFields: (updatedFields, availableFieldNames, cardKind) =>
         this.setCardTypeFields(updatedFields, availableFieldNames, cardKind),
       resolveConfiguredFieldName: (noteInfo, ...preferredNames) =>
@@ -1783,6 +1793,10 @@ export class AnkiIntegration {
     this.consumeSubtitleMiningContextCallback = callback;
   }
 
+  setSentenceFuriganaGenerator(callback: typeof this.generateSentenceFuriganaCallback): void {
+    this.generateSentenceFuriganaCallback = callback;
+  }
+
   setMediaTimingReviewCallback(
     callback: ((request: MediaTimingReviewRequest) => Promise<MediaTimingReviewDecision>) | null,
   ): void {

src/anki-integration/note-update-workflow.test.ts

@@ -166,13 +166,14 @@ test('NoteUpdateWorkflow uses configured fields for word-card enrichment with La
 
 test('NoteUpdateWorkflow updates sentence furigana when highlight processor changes it', async () => {
   const harness = createWorkflowHarness();
+  harness.deps.getCurrentSubtitleText = () => 'tokugi';
   harness.deps.client.notesInfo = async () =>
     [
       {
         noteId: 42,
         fields: {
           Expression: { value: 'tokugi' },
-          Sentence: { value: '' },
+          Sentence: { value: 'tokugi' },
           SentenceFurigana: { value: '<span class="term">tokugi</span>' },
         },
       },
@@ -184,7 +185,7 @@ test('NoteUpdateWorkflow updates sentence furigana when highlight processor chan
 
   assert.equal(harness.updates.length, 1);
   assert.deepEqual(harness.updates[0]?.fields, {
-    Sentence: 'subtitle-text',
+    Sentence: 'tokugi',
     SentenceFurigana: '<span class="term"><b>tokugi</b></span>',
   });
 });
@@ -776,3 +777,63 @@ test('NoteUpdateWorkflow keeps cache unchanged and reports when deletion fails',
   assert.deepEqual(statusMessages, ['Card deletion failed: delete failed']);
   assert.ok(harness.warnings.length === 0);
 });
+
+for (const outcome of ['success', 'unavailable', 'throws'] as const) {
+  test(`NoteUpdateWorkflow regenerates expanded furigana (${outcome})`, async () => {
+    const harness = createWorkflowHarness();
+    harness.deps.client.notesInfo = async () => [
+      {
+        noteId: 42,
+        fields: {
+          Expression: { value: '猫' },
+          Sentence: { value: '<b>猫</b>を見た。' },
+          SentenceFurigana: { value: ' 猫[ねこ]を 見[み]た。' },
+        },
+      },
+    ];
+    harness.deps.captureSubtitleMediaContext = () => ({
+      source: 'overlay',
+      text: '猫を見た。',
+      startTime: 4,
+      endTime: 6,
+    });
+    harness.deps.reviewMediaTiming = async () => ({
+      action: 'confirm',
+      text: '猫を見た。犬もいた。',
+      startTime: 2,
+      endTime: 8,
+    });
+    harness.deps.generateSentenceFurigana = async (text, fields) => {
+      assert.equal(text, '猫を見た。犬もいた。');
+      assert.equal(fields.expression, '猫');
+      if (outcome === 'throws') throw new Error('parser unavailable');
+      return outcome === 'success' ? '<b> 猫[ねこ]</b>を 見[み]た。 犬[いぬ]もいた。' : null;
+    };
+    await harness.workflow.execute(42);
+    assert.equal(harness.updates[0]?.fields.Sentence, '猫を見た。犬もいた。');
+    assert.equal(
+      harness.updates[0]?.fields.SentenceFurigana,
+      outcome === 'success' ? '<b> 猫[ねこ]</b>を 見[み]た。 犬[いぬ]もいた。' : '',
+    );
+  });
+}
+
+test('NoteUpdateWorkflow preserves native furigana formatting when sentence context is unchanged', async () => {
+  const harness = createWorkflowHarness();
+  harness.deps.client.notesInfo = async () => [
+    {
+      noteId: 42,
+      fields: {
+        Expression: { value: '猫' },
+        Sentence: { value: '<b>猫</b>を見た。' },
+        SentenceFurigana: { value: '<ruby>猫<rt>ねこ</rt></ruby>を見た。' },
+      },
+    },
+  ];
+  harness.deps.getCurrentSubtitleText = () => '猫を見た。';
+  harness.deps.generateSentenceFurigana = async () => {
+    assert.fail('unchanged sentence must keep native formatting');
+  };
+  await harness.workflow.execute(42);
+  assert.equal(harness.updates[0]?.fields.SentenceFurigana, undefined);
+});

src/anki-integration/note-update-workflow.ts

@@ -74,6 +74,10 @@ export interface NoteUpdateWorkflowDeps {
     sentenceFurigana: string,
     noteFields: Record<string, string>,
   ) => string;
+  generateSentenceFurigana?: (
+    text: string,
+    noteFields: Record<string, string>,
+  ) => Promise<string | null>;
   setCardTypeFields: (
     updatedFields: Record<string, string>,
     availableFieldNames: string[],
@@ -282,7 +286,27 @@ export class NoteUpdateWorkflow {
       const existingSentenceFurigana = sentenceFuriganaField
         ? noteInfo.fields[sentenceFuriganaField]?.value || ''
         : '';
-      if (sentenceFuriganaField && existingSentenceFurigana && this.deps.processSentenceFurigana) {
+      const sentenceChanged =
+        sentenceField &&
+        currentSubtitleText &&
+        normalizeSubtitleContextText(currentSubtitleText) !==
+          normalizeSubtitleContextText(noteInfo.fields[sentenceField]?.value ?? '');
+      if (sentenceFuriganaField && sentenceChanged) {
+        let furigana: string | null = null;
+        try {
+          furigana =
+            (await this.deps.generateSentenceFurigana?.(currentSubtitleText, fields)) ?? null;
+        } catch (error) {
+          this.deps.logWarn('Failed to regenerate sentence furigana:', error);
+        }
+        // Empty furigana lets card templates fall back to the updated Sentence field.
+        updatedFields[sentenceFuriganaField] = furigana ?? '';
+        updatePerformed = true;
+      } else if (
+        sentenceFuriganaField &&
+        existingSentenceFurigana &&
+        this.deps.processSentenceFurigana
+      ) {
         const processedSentenceFurigana = this.deps.processSentenceFurigana(
           existingSentenceFurigana,
           fields,

src/anki-integration/sentence-furigana.test.ts

@@ -0,0 +1,80 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { formatSentenceFurigana } from './sentence-furigana';
+
+const parsed = [
+  {
+    source: 'scanning-parser',
+    content: [
+      [{ text: '猫', reading: 'ねこ' }],
+      [{ text: 'を' }],
+      [{ text: '見', reading: 'み' }, { text: 'た' }],
+      [{ text: '。\n' }],
+      [{ text: '犬', reading: 'いぬ' }],
+      [{ text: 'もいた。' }],
+    ],
+  },
+];
+
+test('formats the complete expanded sentence with readings and the mined word highlighted', () => {
+  assert.equal(
+    formatSentenceFurigana('猫を見た。\n犬もいた。', parsed, '猫'),
+    '<b> 猫[ねこ]</b>を 見[み]た。\n 犬[いぬ]もいた。',
+  );
+});
+
+test('rejects headword-only and malformed parse results instead of saving partial furigana', () => {
+  assert.equal(
+    formatSentenceFurigana('猫を見た。', [
+      { source: 'scanning-parser', content: [[{ text: '猫', reading: 'ねこ' }]] },
+    ]),
+    null,
+  );
+  assert.equal(
+    formatSentenceFurigana('猫', [
+      { source: 'scanning-parser', content: [[{ text: '猫', reading: 42 }]] },
+    ]),
+    null,
+  );
+});
+
+test('escapes literal markup and annotation delimiters and leaves kana unannotated', () => {
+  const text = '<猫> [メモ]';
+  assert.equal(
+    formatSentenceFurigana(text, [
+      {
+        source: 'scanning-parser',
+        content: [
+          [{ text: '<' }],
+          [{ text: '猫', reading: 'ねこ' }],
+          [{ text: '> [' }],
+          [{ text: 'メモ', reading: 'めも' }],
+          [{ text: ']' }],
+        ],
+      },
+    ]),
+    '&lt; 猫[ねこ]&gt; &#91;メモ&#93;',
+  );
+});
+
+test('highlights the mined word without bolding the rest of a dictionary phrase', () => {
+  assert.equal(
+    formatSentenceFurigana(
+      '行儀を直して',
+      [
+        {
+          content: [
+            [
+              { text: '行儀', reading: 'ぎょうぎ' },
+              { text: 'を' },
+              { text: '直', reading: 'なお' },
+              { text: 'して' },
+            ],
+          ],
+        },
+      ],
+      '行儀',
+    ),
+    '<b> 行儀[ぎょうぎ]</b>を 直[なお]して',
+  );
+});

src/anki-integration/sentence-furigana.ts

@@ -0,0 +1,87 @@
+type Segment = { text: string; reading?: string };
+
+function readGroups(value: unknown): Segment[][] | null {
+  if (!Array.isArray(value)) return null;
+  const groups: Segment[][] = [];
+  const rawGroups: unknown[] = value;
+  for (const group of rawGroups) {
+    if (!Array.isArray(group)) return null;
+    const segments: Segment[] = [];
+    const rawSegments: unknown[] = group;
+    for (const segment of rawSegments) {
+      if (
+        typeof segment !== 'object' ||
+        segment === null ||
+        !('text' in segment) ||
+        typeof segment.text !== 'string' ||
+        ('reading' in segment &&
+          segment.reading !== undefined &&
+          typeof segment.reading !== 'string')
+      )
+        return null;
+      segments.push({
+        text: segment.text,
+        reading:
+          'reading' in segment && typeof segment.reading === 'string' ? segment.reading : undefined,
+      });
+    }
+    groups.push(segments);
+  }
+  return groups;
+}
+
+function escapeText(text: string): string {
+  return text
+    .replace(/&/g, '&')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/\[/g, '&#91;')
+    .replace(/\]/g, '&#93;');
+}
+
+// Only accept a complete parse, so a lookup of just the headword cannot replace sentence context.
+export function formatSentenceFurigana(
+  text: string,
+  results: unknown[] | null,
+  highlightedText?: string,
+): string | null {
+  for (const result of results ?? []) {
+    if (typeof result !== 'object' || result === null || !('content' in result)) continue;
+    const groups = readGroups(result.content);
+    if (
+      !groups ||
+      groups
+        .flat()
+        .map((segment) => segment.text)
+        .join('') !== text
+    )
+      continue;
+    const highlights: number[] = [];
+    if (highlightedText) {
+      let start = text.indexOf(highlightedText);
+      while (start >= 0) {
+        highlights.push(start);
+        start = text.indexOf(highlightedText, start + highlightedText.length);
+      }
+    }
+    let offset = 0;
+    let bold = false;
+    let output = '';
+    for (const { text: surface, reading } of groups.flat()) {
+      const start = offset;
+      offset += surface.length;
+      const highlighted = highlights.some(
+        (position) => position < offset && position + (highlightedText?.length ?? 0) > start,
+      );
+      if (highlighted !== bold) output += highlighted ? '<b>' : '</b>';
+      bold = highlighted;
+      const escaped = escapeText(surface);
+      output +=
+        reading && reading !== surface && /[\p{Script=Han}々]/u.test(surface)
+          ? ` ${escaped}[${escapeText(reading)}]`
+          : escaped;
+    }
+    return output + (bold ? '</b>' : '');
+  }
+  return null;
+}

src/config/definitions.ts

@@ -56,6 +56,7 @@ const { immersionTracking } = IMMERSION_DEFAULT_CONFIG;
 const { stats } = STATS_DEFAULT_CONFIG;
 
 export const DEFAULT_CONFIG: ResolvedConfig = {
+  subtitleSelection: { enabled: false },
   subtitleGeneration: { ...DEFAULT_SUBTITLE_GENERATION_CONFIG },
   subtitlePosition,
   keybindings,

src/config/definitions/defaults-core.ts

@@ -99,6 +99,7 @@ export const CORE_DEFAULT_CONFIG: Pick<
     openRuntimeOptions: 'CommandOrControl+Shift+O',
     openJimaku: 'Ctrl+Shift+J',
     openTsukihime: 'Ctrl+Shift+T',
+    openSubtitleSelection: 'g-s',
     openSubtitleGeneration: 'Ctrl+Shift+G',
     openSessionHelp: 'CommandOrControl+Slash',
     openControllerSelect: 'Alt+C',

src/config/definitions/options-core.ts

@@ -628,6 +628,13 @@ export function buildCoreConfigOptionRegistry(
       defaultValue: defaultConfig.shortcuts.openSessionHelp,
       description: 'Accelerator that opens the session help / keybinding cheatsheet.',
     },
+    {
+      path: 'shortcuts.openSubtitleSelection',
+      kind: 'string',
+      defaultValue: defaultConfig.shortcuts.openSubtitleSelection,
+      description:
+        'Open subtitle selection when enabled. Use g-s to press g then s. Set null to unbind.',
+    },
     {
       path: 'shortcuts.openSubtitleGeneration',
       kind: 'string',

src/config/definitions/options-subtitle.ts

@@ -6,6 +6,13 @@ export function buildSubtitleConfigOptionRegistry(
   defaultConfig: ResolvedConfig,
 ): ConfigOptionRegistryEntry[] {
   return [
+    {
+      path: 'subtitleSelection.enabled',
+      kind: 'boolean',
+      defaultValue: defaultConfig.subtitleSelection.enabled,
+      description:
+        'Use the SubMiner modal to select primary and secondary subtitle tracks. When enabled, its shortcut overrides mpv subtitle selection.',
+    },
     ...(
       ['whisperPath', 'modelPath', 'ffmpegPath', 'ffprobePath', 'vadModelPath', 'vadPath'] as const
     ).map((key) => ({

src/config/definitions/template-sections.ts

@@ -1,6 +1,12 @@
 import { ConfigTemplateSection } from './shared';
 
 const CORE_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
+  {
+    title: 'Subtitle Selection',
+    description: ['Select primary and secondary mpv subtitle tracks from the overlay.'],
+    notes: ['Hot-reload: enabling or disabling updates the session shortcut immediately.'],
+    key: 'subtitleSelection',
+  },
   {
     title: 'Japanese Subtitle Generation',
     description: [

src/config/hot-reload.ts

@@ -2,7 +2,13 @@ function pathStartsWith(path: string, prefix: string): boolean {
   return path === prefix || path.startsWith(`${prefix}.`);
 }
 
-const HOT_RELOAD_ROOTS = ['subtitleStyle', 'keybindings', 'shortcuts', 'subtitleSidebar'] as const;
+const HOT_RELOAD_ROOTS = [
+  'subtitleStyle',
+  'keybindings',
+  'shortcuts',
+  'subtitleSidebar',
+  'subtitleSelection',
+] as const;
 
 const HOT_RELOAD_EXACT_OR_PREFIX_PATHS = [
   'secondarySub.defaultMode',

src/config/resolve/core-domains.ts

@@ -6,6 +6,25 @@ import { asBoolean, asNumber, asString, isObject } from './shared';
 export function applyCoreDomainConfig(context: ResolveContext): void {
   const { src, resolved, warn } = context;
 
+  if (isObject(src.subtitleSelection)) {
+    const enabled = asBoolean(src.subtitleSelection.enabled);
+    if (enabled !== undefined) resolved.subtitleSelection.enabled = enabled;
+    else if (src.subtitleSelection.enabled !== undefined)
+      warn(
+        'subtitleSelection.enabled',
+        src.subtitleSelection.enabled,
+        resolved.subtitleSelection.enabled,
+        'Expected boolean.',
+      );
+  } else if (src.subtitleSelection !== undefined) {
+    warn(
+      'subtitleSelection',
+      src.subtitleSelection,
+      resolved.subtitleSelection,
+      'Expected object.',
+    );
+  }
+
   if (isObject(src.texthooker)) {
     const launchAtStartup = asBoolean(src.texthooker.launchAtStartup);
     if (launchAtStartup !== undefined) {
@@ -237,6 +256,7 @@ export function applyCoreDomainConfig(context: ResolveContext): void {
       'openRuntimeOptions',
       'openJimaku',
       'openTsukihime',
+      'openSubtitleSelection',
       'openSubtitleGeneration',
       'openSessionHelp',
       'openControllerSelect',

src/config/resolve/subtitle-selection.test.ts

@@ -0,0 +1,63 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { resolveConfig } from '../resolve';
+import { DEFAULT_CONFIG } from '../definitions';
+import { buildConfigSettingsRegistry } from '../settings/registry';
+import { resolveConfiguredShortcuts } from '../../core/utils/shortcut-config';
+import {
+  compileSessionBindings,
+  buildPluginSessionBindingsArtifact,
+} from '../../core/services/session-bindings';
+
+function bindings(config: ReturnType<typeof resolveConfig>['resolved']) {
+  return compileSessionBindings({
+    shortcuts: resolveConfiguredShortcuts(config, DEFAULT_CONFIG),
+    keybindings: config.keybindings,
+    platform: 'linux',
+  });
+}
+
+test('subtitle selection is opt-in and enabling it compiles g-s for mpv and the overlay', () => {
+  const defaults = resolveConfig({}).resolved;
+  assert.equal(defaults.subtitleSelection.enabled, false);
+  assert.equal(defaults.shortcuts.openSubtitleSelection, 'g-s');
+  const find = (config: typeof defaults) =>
+    bindings(config).bindings.find(
+      (binding) =>
+        binding.actionType === 'session-action' && binding.actionId === 'openSubtitleSelection',
+    );
+  assert.equal(find(defaults), undefined);
+  const enabled = resolveConfig({ subtitleSelection: { enabled: true } }).resolved;
+  const binding = find(enabled);
+  assert.ok(binding);
+  assert.deepEqual(binding.key, { code: 'KeyG-KeyS', modifiers: [] });
+  assert.equal(bindings(enabled).warnings.length, 0);
+  const artifact = buildPluginSessionBindingsArtifact({
+    bindings: [binding],
+    warnings: [],
+    numericSelectionTimeoutMs: 1000,
+  });
+  assert.deepEqual(artifact.bindings[0], {
+    ...binding,
+    cliArgs: ['--session-action', '{"actionId":"openSubtitleSelection"}'],
+  });
+  enabled.subtitleSelection.enabled = false;
+  assert.equal(find(enabled), undefined);
+});
+
+test('subtitle selection settings are validated, hot reloadable, and the shortcut can be cleared', () => {
+  // @ts-expect-error Config files can contain invalid values at runtime.
+  const { resolved, warnings } = resolveConfig({ subtitleSelection: { enabled: 'yes' } });
+  assert.equal(resolved.subtitleSelection.enabled, false);
+  assert.equal(warnings.length, 1);
+  const field = buildConfigSettingsRegistry(resolved).find(
+    (entry) => entry.configPath === 'subtitleSelection.enabled',
+  );
+  assert.equal(field?.category, 'behavior');
+  assert.equal(field?.restartBehavior, 'hot-reload');
+  const cleared = resolveConfig({
+    subtitleSelection: { enabled: true },
+    shortcuts: { openSubtitleSelection: null },
+  }).resolved;
+  assert.equal(resolveConfiguredShortcuts(cleared, DEFAULT_CONFIG).openSubtitleSelection, null);
+});

src/config/settings/registry.ts

@@ -455,6 +455,9 @@ function categoryAndSection(path: string): { category: ConfigSettingsCategory; s
   if (path.startsWith('subsync.')) {
     return { category: 'integrations', section: topSection(path) };
   }
+  if (path.startsWith('subtitleSelection.')) {
+    return { category: 'behavior', section: 'Subtitle Selection' };
+  }
   if (path.startsWith('subtitleGeneration.')) {
     return { category: 'integrations', section: 'Japanese Subtitle Generation' };
   }
@@ -631,6 +634,7 @@ function subsectionForPath(path: string): string | undefined {
       leaf === 'openRuntimeOptions' ||
       leaf === 'openJimaku' ||
       leaf === 'openTsukihime' ||
+      leaf === 'openSubtitleSelection' ||
       leaf === 'openSubtitleGeneration' ||
       leaf === 'openSessionHelp' ||
       leaf === 'openControllerSelect' ||

src/core/services/__tests__/stats-server.test.ts

@@ -4321,3 +4321,101 @@ it('TMDB reassignment returns 404 for a missing library entry before fetching de
   assert.equal(fetches, 1);
   assert.deepEqual(assignments, [1]);
 });
+
+for (const outcome of ['success', 'unavailable', 'throws', 'no-field'] as const) {
+  it(`stats word mining updates full sentence furigana without media (${outcome})`, async () => {
+    await withTempDir(async (dir) => {
+      const sourcePath = path.join(dir, 'episode.mkv');
+      fs.writeFileSync(sourcePath, 'fake media');
+      await withFakeAnkiConnect(
+        async (requests, url) => {
+          let calls = 0;
+          const app = createStatsApp(createMockTracker(), {
+            ankiConnectConfig: {
+              url,
+              deck: 'Mining',
+              media: { generateAudio: false, generateImage: false },
+            },
+            addYomitanNote: async () => 12345,
+            generateSentenceFurigana: async (text, word) => {
+              calls++;
+              assert.equal(text, '猫を見た。');
+              assert.equal(word, '猫');
+              if (outcome === 'throws') throw new Error('parser unavailable');
+              return outcome === 'success' ? '<b> 猫[ねこ]</b>を 見[み]た。' : null;
+            },
+          });
+          const response = await app.request('/api/stats/mine-card?mode=word', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+              sourcePath,
+              startMs: 1000,
+              endMs: 2000,
+              sentence: '猫を見た。',
+              word: '猫',
+            }),
+          });
+          assert.equal(response.status, 200);
+          const fields = requests.find((request) => request.action === 'updateNoteFields')?.params
+            ?.note?.fields;
+          assert.equal(fields?.Sentence, '<b>猫</b>を見た。');
+          assert.equal(
+            fields?.sentencefurigana,
+            outcome === 'no-field'
+              ? undefined
+              : outcome === 'success'
+                ? '<b> 猫[ねこ]</b>を 見[み]た。'
+                : '',
+          );
+          assert.equal(calls, outcome === 'no-field' ? 0 : 1);
+        },
+        {
+          notesInfoFields: {
+            Sentence: { value: '猫' },
+            ...(outcome === 'no-field' ? {} : { sentencefurigana: { value: ' 猫[ねこ]' } }),
+          },
+        },
+      );
+    });
+  });
+}
+
+it('stats word mining skips furigana highlighting when highlightWord is disabled', async () => {
+  await withTempDir(async (dir) => {
+    const sourcePath = path.join(dir, 'episode.mkv');
+    fs.writeFileSync(sourcePath, 'fake media');
+    await withFakeAnkiConnect(
+      async (_requests, url) => {
+        const highlights: Array<string | undefined> = [];
+        const app = createStatsApp(createMockTracker(), {
+          ankiConnectConfig: {
+            url,
+            deck: 'Mining',
+            media: { generateAudio: false, generateImage: false },
+            behavior: { highlightWord: false },
+          },
+          addYomitanNote: async () => 12345,
+          generateSentenceFurigana: async (_text, highlightedText) => {
+            highlights.push(highlightedText);
+            return ' 猫[ねこ]を 見[み]た。';
+          },
+        });
+        const response = await app.request('/api/stats/mine-card?mode=word', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            sourcePath,
+            startMs: 1000,
+            endMs: 2000,
+            sentence: '猫を見た。',
+            word: '猫',
+          }),
+        });
+        assert.equal(response.status, 200);
+        assert.deepEqual(highlights, [undefined]);
+      },
+      { notesInfoFields: { Sentence: { value: '猫' }, SentenceFurigana: { value: ' 猫[ねこ]' } } },
+    );
+  });
+});

src/core/services/ipc.ts

@@ -93,7 +93,7 @@ export interface IpcServiceDeps {
   handleMpvCommand: (command: Array<string | number>) => void;
   getKeybindings: () => unknown;
   getMpvInputBindings?: () => Promise<MpvInputBindingsSnapshot>;
-  getSessionBindings?: () => CompiledSessionBinding[];
+  getSessionBindings?: () => CompiledSessionBinding[] | Promise<CompiledSessionBinding[]>;
   getConfiguredShortcuts: () => unknown;
   dispatchSessionAction?: (request: SessionActionDispatchRequest) => void | Promise<void>;
   getStatsToggleKey: () => string;
@@ -378,7 +378,7 @@ export interface IpcDepsRuntimeOptions {
   handleMpvCommand: (command: Array<string | number>) => void;
   getKeybindings: () => unknown;
   getMpvInputBindings?: () => Promise<MpvInputBindingsSnapshot>;
-  getSessionBindings?: () => CompiledSessionBinding[];
+  getSessionBindings?: () => CompiledSessionBinding[] | Promise<CompiledSessionBinding[]>;
   getConfiguredShortcuts: () => unknown;
   dispatchSessionAction?: (request: SessionActionDispatchRequest) => void | Promise<void>;
   getStatsToggleKey: () => string;

src/core/services/overlay-shortcut-handler.test.ts

@@ -29,6 +29,7 @@ function makeShortcuts(overrides: Partial<ConfiguredShortcuts> = {}): Configured
     openRuntimeOptions: null,
     openJimaku: null,
     openTsukihime: null,
+    openSubtitleSelection: null,
     openSubtitleGeneration: null,
     openSessionHelp: null,
     openControllerSelect: null,

src/core/services/overlay-shortcut.test.ts

@@ -24,6 +24,7 @@ function createShortcuts(overrides: Partial<ConfiguredShortcuts> = {}): Configur
     openRuntimeOptions: null,
     openJimaku: null,
     openTsukihime: null,
+    openSubtitleSelection: null,
     openSubtitleGeneration: null,
     openSessionHelp: null,
     openControllerSelect: null,

src/core/services/session-actions.test.ts

@@ -43,6 +43,7 @@ function createDeps(overrides: Partial<SessionActionExecutorDeps> = {}) {
     openControllerDebug: () => calls.push('controller-debug'),
     openJimaku: () => calls.push('jimaku'),
     openTsukihime: () => calls.push('tsukihime'),
+    openSubtitleSelection: () => calls.push('subtitle-selection'),
     openSubtitleGeneration: () => calls.push('subtitle-generation'),
     openYoutubeTrackPicker: () => {
       calls.push('youtube');

src/core/services/session-actions.ts

@@ -25,6 +25,7 @@ export interface SessionActionExecutorDeps {
   openControllerDebug: () => void;
   openJimaku: () => void;
   openTsukihime: () => void;
+  openSubtitleSelection: () => void;
   openSubtitleGeneration: () => void;
   openYoutubeTrackPicker: () => void | Promise<void>;
   openPlaylistBrowser: () => boolean | void | Promise<boolean | void>;
@@ -120,6 +121,9 @@ export async function dispatchSessionAction(
     case 'openTsukihime':
       deps.openTsukihime();
       return;
+    case 'openSubtitleSelection':
+      deps.openSubtitleSelection();
+      return;
     case 'openSubtitleGeneration':
       deps.openSubtitleGeneration();
       return;

src/core/services/session-bindings.test.ts

@@ -24,6 +24,7 @@ function createShortcuts(overrides: Partial<ConfiguredShortcuts> = {}): Configur
     openRuntimeOptions: null,
     openJimaku: null,
     openTsukihime: null,
+    openSubtitleSelection: null,
     openSubtitleGeneration: null,
     openSessionHelp: null,
     openControllerSelect: null,
@@ -707,3 +708,58 @@ test('buildPluginSessionBindingsArtifact preserves plugin selector CLI for no-co
   assert.equal(byActionId.get('copySubtitleMultiple')?.cliArgs, undefined);
   assert.equal(byActionId.get('mineSentenceMultiple')?.cliArgs, undefined);
 });
+
+test('single keys reserve sequence prefixes without reserving the second stroke', () => {
+  for (const key of ['g', 'Ctrl+g', 's']) {
+    const result = compileSessionBindings({
+      shortcuts: createShortcuts({ openSubtitleSelection: 'g-s' }),
+      keybindings: [createKeybinding(key, ['show-text', 'single'])],
+      platform: 'linux',
+    });
+    assert.ok(result.bindings.some((binding) => binding.originalKey === key));
+    assert.equal(
+      result.bindings.some((binding) => binding.originalKey === 'g-s'),
+      key !== 'g',
+    );
+    assert.equal(result.warnings.length, key === 'g' ? 1 : 0);
+    if (key === 'g') assert.match(result.warnings[0]!.message, /Single-key bindings take priority/);
+  }
+});
+
+test('configured shortcuts and built-in overlay keys also reserve sequence prefixes', () => {
+  for (const prefix of ['g', 'y', 'v']) {
+    const result = compileSessionBindings({
+      shortcuts: createShortcuts({ openSubtitleSelection: `${prefix}-s`, copySubtitle: 'g' }),
+      keybindings: [],
+      platform: 'linux',
+    });
+    assert.equal(
+      result.bindings.some((binding) => binding.originalKey === `${prefix}-s`),
+      false,
+    );
+    assert.ok(result.bindings.some((binding) => binding.originalKey === 'g'));
+    assert.equal(result.warnings.length, 1);
+  }
+});
+
+test('sequence reservations follow the sidebar code and literal Shift semantics', () => {
+  for (const [toggleKey, disabled] of [
+    ['KeyG', true],
+    ['g', false],
+    ['G', true],
+  ] as const) {
+    const result = compileSessionBindings({
+      shortcuts: createShortcuts({ openSubtitleSelection: 'Shift+g-s' }),
+      keybindings: [],
+      platform: 'linux',
+      rawConfig: {
+        ...DEFAULT_CONFIG,
+        subtitleSidebar: { ...DEFAULT_CONFIG.subtitleSidebar, toggleKey },
+      },
+    });
+    assert.equal(
+      result.bindings.some((binding) => binding.originalKey === 'Shift+g-s'),
+      !disabled,
+    );
+  }
+});

src/core/services/session-bindings.ts

@@ -12,6 +12,10 @@ import type {
   SessionKeySpec,
 } from '../../types/session-bindings';
 import { SPECIAL_COMMANDS } from '../../config';
+import {
+  resolveSessionSequenceConflicts,
+  type SessionKeyReservation,
+} from '../../shared/session-key-sequences';
 
 type PlatformKeyModel = 'darwin' | 'win32' | 'linux';
 
@@ -56,6 +60,7 @@ const SESSION_SHORTCUT_ACTIONS: Array<{
   { key: 'openRuntimeOptions', actionId: 'openRuntimeOptions' },
   { key: 'openJimaku', actionId: 'openJimaku' },
   { key: 'openTsukihime', actionId: 'openTsukihime' },
+  { key: 'openSubtitleSelection', actionId: 'openSubtitleSelection' },
   { key: 'openSubtitleGeneration', actionId: 'openSubtitleGeneration' },
   { key: 'openSessionHelp', actionId: 'openSessionHelp' },
   { key: 'openControllerSelect', actionId: 'openControllerSelect' },
@@ -81,6 +86,13 @@ function normalizeCodeToken(
 ): string | null {
   const normalized = token.trim();
   if (!normalized) return null;
+  // Two lowercase letters use mpv's sequential-key syntax, for example g-s.
+  if (/^[a-z]-[a-z]$/.test(normalized)) {
+    return normalized
+      .split('-')
+      .map((letter) => `Key${letter.toUpperCase()}`)
+      .join('-');
+  }
   if (options.allowMouseButtons === true) {
     const normalizedMouse = normalized.toUpperCase();
     if (MPV_MOUSE_BUTTON_CODES.has(normalizedMouse)) {
@@ -543,7 +555,37 @@ export function compileSessionBindings(input: CompileSessionBindingsInput): {
   }
 
   bindings.sort((left, right) => left.sourcePath.localeCompare(right.sourcePath));
-  return { bindings, warnings };
+  const reservations: SessionKeyReservation[] = [
+    { key: { code: 'KeyY', modifiers: [] }, path: 'built-in y sequences' },
+    { key: { code: 'KeyV', modifiers: [] }, path: 'primary subtitle visibility key' },
+    { key: { code: 'KeyY', modifiers: ['ctrl'] }, path: 'lookup window toggle' },
+    { key: { code: 'KeyY', modifiers: ['meta'] }, path: 'lookup window toggle' },
+    { key: { code: 'KeyY', modifiers: ['ctrl', 'shift'] }, path: 'keyboard-driven mode toggle' },
+    { key: { code: 'KeyY', modifiers: ['shift', 'meta'] }, path: 'keyboard-driven mode toggle' },
+    ...[...candidates.values()].flatMap((drafts) =>
+      drafts.map(({ binding }) => ({
+        key: binding.key,
+        path: binding.sourcePath,
+      })),
+    ),
+  ];
+  const sidebarKey = input.rawConfig?.subtitleSidebar?.toggleKey;
+  if (sidebarKey) {
+    const { key } = parseSessionBindingKey(sidebarKey, input.platform);
+    if (key) {
+      // The sidebar accepts DOM codes with either Shift state, or literal characters.
+      if (/^[A-Z]$/.test(sidebarKey)) key.modifiers = ['shift'];
+      reservations.push({ key, path: 'subtitleSidebar.toggleKey' });
+      if (/^Key[A-Z]$/.test(sidebarKey)) {
+        reservations.push({
+          key: { ...key, modifiers: ['shift'] },
+          path: 'subtitleSidebar.toggleKey',
+        });
+      }
+    }
+  }
+  const result = resolveSessionSequenceConflicts(bindings, reservations);
+  return { bindings: result.bindings, warnings: [...warnings, ...result.warnings] };
 }
 
 export function buildPluginSessionBindingsArtifact(input: {

src/core/services/stats-server.ts

@@ -1,3 +1,4 @@
+import type { StatsMiningRouteOptions } from './stats-server/mining-support';
 import { Hono } from 'hono';
 import http, { type IncomingMessage, type ServerResponse } from 'node:http';
 import { Readable } from 'node:stream';
@@ -132,6 +133,7 @@ export interface StatsServerConfig {
   anilistRateLimiter?: AnilistRateLimiter;
   tmdbClient?: TmdbClient;
   addYomitanNote?: (word: string) => Promise<number | null>;
+  generateSentenceFurigana?: StatsMiningRouteOptions['generateSentenceFurigana'];
   resolveAnkiNoteId?: (noteId: number) => number;
   resolveSentenceSearchHeadwords?: (term: string) => Promise<string[]> | string[];
 }
@@ -155,6 +157,7 @@ export function createStatsApp(
     anilistRateLimiter?: AnilistRateLimiter;
     tmdbClient?: TmdbClient;
     addYomitanNote?: (word: string) => Promise<number | null>;
+    generateSentenceFurigana?: StatsMiningRouteOptions['generateSentenceFurigana'];
     resolveAnkiNoteId?: (noteId: number) => number;
     resolveSentenceSearchHeadwords?: (term: string) => Promise<string[]> | string[];
     createMediaGenerator?: () => StatsServerMediaGenerator;
@@ -191,6 +194,7 @@ export async function startStatsServerWithRuntime(
     anilistRateLimiter: config.anilistRateLimiter,
     tmdbClient: config.tmdbClient,
     addYomitanNote: config.addYomitanNote,
+    generateSentenceFurigana: config.generateSentenceFurigana,
     resolveAnkiNoteId: config.resolveAnkiNoteId,
     resolveSentenceSearchHeadwords: config.resolveSentenceSearchHeadwords,
   });

src/core/services/stats-server/mining-routes.ts

@@ -17,7 +17,6 @@ import {
   getStatsDirectMiningAudioFieldNames,
   getStatsWordMiningAudioFieldName,
   resolveStatsNoteFieldName,
-  shouldUseStatsLapisKikuCardFields,
   statsMiningLogger,
   type StatsMiningRouteOptions,
   type StatsServerNoteInfo,
@@ -228,19 +227,11 @@ export function registerStatsMiningRoutes(app: Hono, options?: StatsMiningRouteO
 
       let imageBuffer = imageResult.status === 'fulfilled' ? imageResult.value : null;
       let noteInfo: StatsServerNoteInfo | null = null;
-      if (
-        audioBuffer ||
-        (syncAnimatedImageToWordAudio && generateImage) ||
-        shouldUseStatsLapisKikuCardFields(ankiConfig)
-      ) {
       try {
         const noteInfoResult = (await client.notesInfo([noteId])) as StatsServerNoteInfo[];
         noteInfo = noteInfoResult[0] ?? null;
-        } catch (err) {
-          if (syncAnimatedImageToWordAudio && generateImage) {
-            errors.push(`image: ${(err as Error).message}`);
-          }
-        }
+      } catch (error) {
+        errors.push(`note fields: ${error instanceof Error ? error.message : String(error)}`);
       }
       if (syncAnimatedImageToWordAudio && generateImage) {
         try {
@@ -272,6 +263,24 @@ export function registerStatsMiningRoutes(app: Hono, options?: StatsMiningRouteO
       const imageFieldName = ankiConfig.fields?.image ?? 'Picture';
 
       mediaFields[sentenceFieldName] = highlightedSentence;
+      const furiganaFieldName = noteInfo
+        ? resolveStatsNoteFieldName(noteInfo, 'SentenceFurigana')
+        : null;
+      if (furiganaFieldName) {
+        let furigana: string | null = null;
+        try {
+          furigana =
+            (await options?.generateSentenceFurigana?.(
+              sentence,
+              ankiConfig.behavior?.highlightWord === false ? undefined : word,
+            )) ?? null;
+        } catch (error) {
+          statsMiningLogger.warn('Failed to generate sentence furigana:', error);
+        }
+        mediaFields[furiganaFieldName] = furigana ?? '';
+        if (furigana === null)
+          errors.push('furigana: unavailable; using the full sentence without readings');
+      }
       applyStatsWordCardFields(mediaFields, noteInfo, ankiConfig);
 
       if (audioBuffer) {

src/core/services/stats-server/mining-support.ts

@@ -39,6 +39,7 @@ export type StatsMiningRouteOptions = {
     input: RetimedSecondarySubtitleInput,
   ) => Promise<string> | string;
   addYomitanNote?: (word: string) => Promise<number | null>;
+  generateSentenceFurigana?: (text: string, highlightedText?: string) => Promise<string | null>;
   createMediaGenerator?: () => StatsServerMediaGenerator;
   onMiningTiming?: (event: StatsMiningTimingEvent) => void;
   nowMs?: () => number;

src/core/services/tokenizer/sentence-furigana.test.ts

@@ -0,0 +1,46 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { generateSentenceFurigana } from './sentence-furigana';
+import { createDeps, runInjectedYomitanScript } from './yomitan-scan-test-harness';
+
+test('generates sentence readings through the parser runtime bridge', async () => {
+  const requests: string[] = [];
+  const deps = createDeps((script) =>
+    runInjectedYomitanScript(script, (action, params) => {
+      requests.push(action);
+      if (action === 'optionsGetFull')
+        return { profileCurrent: 0, profiles: [{ options: { scanning: { length: 20 } } }] };
+      assert.equal(action, 'parseText');
+      assert.ok(typeof params === 'object' && params !== null && 'text' in params);
+      assert.equal(params.text, '猫がいる。');
+      return [
+        {
+          source: 'scanning-parser',
+          content: [[{ text: '猫', reading: 'ねこ' }], [{ text: 'がいる。', reading: '' }]],
+        },
+      ];
+    }),
+  );
+  assert.equal(
+    await generateSentenceFurigana('猫がいる。', '猫', deps, { error: assert.fail }),
+    '<b> 猫[ねこ]</b>がいる。',
+  );
+  assert.ok(requests.includes('parseText'));
+});
+
+test(
+  'a stalled parser cannot indefinitely block sentence and media updates',
+  { timeout: 15_000 },
+  async () => {
+    const warnings: string[] = [];
+    const deps = createDeps(() => new Promise<never>(() => {}));
+    assert.equal(
+      await generateSentenceFurigana('猫', undefined, deps, {
+        error: () => undefined,
+        warn: (message) => warnings.push(message),
+      }),
+      null,
+    );
+    assert.equal(warnings.length, 1);
+  },
+);

src/core/services/tokenizer/sentence-furigana.ts

@@ -0,0 +1,28 @@
+import { formatSentenceFurigana } from '../../../anki-integration/sentence-furigana';
+import { requestYomitanParseResults } from './yomitan-parser-runtime';
+
+export async function generateSentenceFurigana(
+  text: string,
+  highlightedText: string | undefined,
+  deps: Parameters<typeof requestYomitanParseResults>[1],
+  logger: Parameters<typeof requestYomitanParseResults>[2],
+): Promise<string | null> {
+  let timer: ReturnType<typeof setTimeout> | undefined;
+  try {
+    const results = await Promise.race([
+      requestYomitanParseResults(text, deps, logger),
+      new Promise<never>((_, reject) => {
+        timer = setTimeout(
+          () => reject(new Error('Sentence furigana generation timed out')),
+          10_000,
+        );
+      }),
+    ]);
+    return formatSentenceFurigana(text, results, highlightedText);
+  } catch (error) {
+    logger.warn?.('Failed to generate sentence furigana:', error);
+    return null;
+  } finally {
+    clearTimeout(timer);
+  }
+}

src/core/utils/shortcut-config.ts

@@ -16,6 +16,7 @@ export interface ConfiguredShortcuts {
   openRuntimeOptions: string | null | undefined;
   openJimaku: string | null | undefined;
   openTsukihime: string | null | undefined;
+  openSubtitleSelection: string | null | undefined;
   openSubtitleGeneration: string | null | undefined;
   openSessionHelp: string | null | undefined;
   openControllerSelect: string | null | undefined;
@@ -68,6 +69,10 @@ export function resolveConfiguredShortcuts(
     openRuntimeOptions: normalizeShortcut(shortcutValue('openRuntimeOptions')),
     openJimaku: normalizeShortcut(shortcutValue('openJimaku')),
     openTsukihime: normalizeShortcut(shortcutValue('openTsukihime')),
+    openSubtitleSelection:
+      config.subtitleSelection?.enabled === true
+        ? normalizeShortcut(shortcutValue('openSubtitleSelection'))
+        : null,
     openSubtitleGeneration: normalizeShortcut(shortcutValue('openSubtitleGeneration')),
     openSessionHelp: normalizeShortcut(shortcutValue('openSessionHelp')),
     openControllerSelect: normalizeShortcut(shortcutValue('openControllerSelect')),

src/main.ts

@@ -15,6 +15,7 @@
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
+import { generateSentenceFurigana } from './core/services/tokenizer/sentence-furigana';
 import {
   app,
   BrowserWindow,
@@ -75,7 +76,6 @@ protocol.registerSchemesAsPrivileged([
 ]);
 
 import * as fs from 'fs';
-import { spawn } from 'node:child_process';
 import * as os from 'os';
 import * as path from 'path';
 import { MecabTokenizer } from './mecab-tokenizer';
@@ -122,11 +122,6 @@ import {
 import { printHelp } from './cli/help';
 import { IPC_CHANNELS, type OverlayHostedModal } from './shared/ipc/contracts';
 import { buildMpvLoggingArgs } from './shared/mpv-logging-args';
-import {
-  MPV_X11_BACKEND_ARGS,
-  applyX11EnvOverrides,
-  shouldForceX11WaylandSession,
-} from './shared/mpv-x11-backend';
 import { AnkiConnectClient } from './anki-connect';
 import {
   getStartupModeFlags,
@@ -393,6 +388,7 @@ import {
   getConfiguredWindowsMpvPathStatus,
   launchWindowsMpv,
 } from './main/runtime/windows-mpv-launch';
+import { resolveMpvExecutablePath, spawnMpvProcess } from './main/runtime/mpv-process';
 import { createWaitForMpvConnectedHandler } from './main/runtime/jellyfin-remote-connection';
 import {
   DEFAULT_JELLYFIN_CLIENT_NAME,
@@ -466,6 +462,11 @@ import { handleMpvCommandFromIpcRuntime } from './main/ipc-mpv-command';
 import { registerIpcRuntimeServices } from './main/ipc-runtime';
 import { createSubtitleGenerationRuntime } from './main/runtime/subtitle-generation-runtime';
 import { registerSubtitleGenerationIpc } from './main/runtime/subtitle-generation-ipc';
+import {
+  createSubtitleSelectionRuntime,
+  openSubtitleSelectionModal,
+  registerSubtitleSelectionIpc,
+} from './main/runtime/subtitle-selection';
 import { openSubtitleGenerationModal } from './main/runtime/subtitle-generation-open';
 import { createAnkiJimakuIpcRuntimeServiceDeps } from './main/dependencies';
 import { createMainBootServices, type MainBootServicesResult } from './main/boot/services';
@@ -677,22 +678,6 @@ const MPV_JELLYFIN_DEFAULT_ARGS = [
   '--slang=ja,jp,jpn,japanese,en,eng,english,enus,en-us',
 ] as const;
 
-/**
- * Spawn a SubMiner-managed mpv (Jellyfin/YouTube) detached. On unsupported Wayland
- * sessions it is pinned to XWayland — Wayland-hint env stripped and an X11 GPU context
- * appended — so the XWayland overlay can stay above it, matching the `subminer` launcher.
- */
-function spawnManagedMpvProcess(args: string[]): ReturnType<typeof spawn> {
-  if (!shouldForceX11WaylandSession(process.env)) {
-    return spawn('mpv', args, { detached: true, stdio: 'ignore' });
-  }
-  return spawn('mpv', [...args, ...MPV_X11_BACKEND_ARGS], {
-    detached: true,
-    stdio: 'ignore',
-    env: applyX11EnvOverrides({ ...process.env }),
-  });
-}
-
 let activeJellyfinRemotePlayback: ActiveJellyfinRemotePlaybackState | null = null;
 let jellyfinRemoteLastProgressAtMs = 0;
 let jellyfinMpvAutoLaunchInFlight: Promise<boolean> | null = null;
@@ -3179,18 +3164,20 @@ const {
     sleep: (delayMs) => new Promise((resolve) => setTimeout(resolve, delayMs)),
   },
   launchMpvIdleForJellyfinPlaybackMainDeps: {
+    getMpvExecutablePath: () =>
+      resolveMpvExecutablePath(configService.getConfig().mpv.executablePath),
     getSocketPath: () => appState.mpvSocketPath,
     getLaunchMode: () => configService.getConfig().mpv.launchMode,
     platform: process.platform,
     execPath: process.execPath,
     getRuntimePluginEntrypoint: () => resolveBundledMpvRuntimePluginEntrypoint(),
-    getInstalledPluginDetection: () =>
+    getInstalledPluginDetection: (mpvExecutablePath) =>
       detectInstalledMpvPlugin({
         platform: process.platform,
         homeDir: os.homedir(),
         xdgConfigHome: process.env.XDG_CONFIG_HOME,
         appDataDir: app.getPath('appData'),
-        mpvExecutablePath: configService.getConfig().mpv.executablePath,
+        mpvExecutablePath,
       }),
     getPluginRuntimeConfig: () => getMpvPluginRuntimeConfig(),
     getDefaultMpvLogPath: () => (isLogFileEnabled('mpv') ? DEFAULT_MPV_LOG_PATH : ''),
@@ -3198,7 +3185,7 @@ const {
     removeSocketPath: (socketPath) => {
       fs.rmSync(socketPath, { force: true });
     },
-    spawnMpv: (args) => spawnManagedMpvProcess(args),
+    spawnMpv: spawnMpvProcess,
     logWarn: (message, error) => logger.warn(message, error),
     logInfo: (message) => logger.info(message),
   },
@@ -4583,6 +4570,7 @@ const {
       maybeStartOverlayLoadingOsd();
       flushQueuedMpvOsdNotifications();
       secondarySubtitleTrackController.scheduleRefresh(0);
+      void refreshMpvSessionBindings();
       if (appState.sessionBindingsInitialized) {
         sendMpvCommandRuntime(appState.mpvClient, [
           'script-message',
@@ -5144,6 +5132,13 @@ function createMainWindow(): BrowserWindow {
   return window;
 }
 
+function generateMiningSentenceFurigana(
+  text: string,
+  highlightedText?: string,
+): Promise<string | null> {
+  return generateSentenceFurigana(text, highlightedText, getYomitanParserRuntimeDeps(), logger);
+}
+
 function initializeOverlayRuntime(): void {
   initializeOverlayRuntimeHandler();
   if (!(appState.initialArgs && isHeadlessInitialCommand(appState.initialArgs))) {
@@ -5153,6 +5148,7 @@ function initializeOverlayRuntime(): void {
   appState.ankiIntegration?.setKnownWordCacheUpdatedCallback(refreshCurrentSubtitleAnnotations);
   appState.ankiIntegration?.setSubtitleMiningContextConsumer(consumePendingSubtitleMiningContext);
   appState.ankiIntegration?.setMediaTimingReviewCallback(mediaTimingReviewRuntime.requestReview);
+  appState.ankiIntegration?.setSentenceFuriganaGenerator(generateMiningSentenceFurigana);
   syncOverlayMpvSubtitleSuppression();
 }
 
@@ -5235,7 +5231,8 @@ const {
   },
 });
 
-const { persistSessionBindings, refreshCurrentSessionBindings } = createSessionBindingsRuntime({
+const { persistSessionBindings, refreshCurrentSessionBindings, refreshMpvSessionBindings } =
+  createSessionBindingsRuntime({
     configDir: CONFIG_DIR,
     getKeybindings: () => appState.keybindings,
     getConfiguredShortcuts: () => getConfiguredShortcuts(),
@@ -5248,6 +5245,17 @@ const { persistSessionBindings, refreshCurrentSessionBindings } = createSessionB
       appState.sessionBindingsInitialized = initialized;
     },
     logWarn: (message) => logger.warn(message),
+    onBindingsChanged: (bindings) =>
+      overlayManager.broadcastToOverlayWindows(IPC_CHANNELS.event.sessionBindingsChanged, bindings),
+    onWarning: (warning) => {
+      if (warning.kind !== 'conflict') return;
+      overlayNotificationsRuntime.showOverlayNotification({
+        id: `session-binding-conflict:${warning.path}`,
+        title: 'Shortcut conflict',
+        body: warning.message,
+        variant: 'warning',
+      });
+    },
   });
 
 const { flushMpvLog, showMpvOsd } = createMpvOsdRuntimeHandlers({
@@ -5503,6 +5511,14 @@ async function dispatchSessionAction(request: SessionActionDispatchRequest): Pro
     openJimaku: () => openJimakuOverlay(),
     openTsukihime: () => openTsukihimeOverlay(),
     openSessionHelp: () => openSessionHelpOverlay(),
+    openSubtitleSelection: () => {
+      if (!configService.getConfig().subtitleSelection.enabled) return;
+      openOverlayHostedModalWithOsd(
+        openSubtitleSelectionModal,
+        'Subtitle selection overlay unavailable.',
+        'Failed to open subtitle selection overlay.',
+      );
+    },
     openSubtitleGeneration: () => openSubtitleGenerationOverlay(),
     openCharacterDictionaryManager: () => openCharacterDictionaryManagerOverlay(),
     openControllerSelect: () => openControllerSelectOverlay(),
@@ -5855,8 +5871,9 @@ const { registerIpcRuntimeHandlers } = composeIpcRuntimeHandlers({
       saveSubtitlePosition: (position) => saveSubtitlePosition(position),
       getMecabTokenizer: () => appState.mecabTokenizer,
       getKeybindings: () => appState.keybindings,
-      getMpvInputBindings: () =>
-        readMpvInputBindings({
+      getMpvInputBindings: async () => {
+        await refreshMpvSessionBindings();
+        return readMpvInputBindings({
           getMpvClient: () => appState.mpvClient,
           getConfiguredKeybindings: () => configService.getConfig().keybindings ?? [],
           platform:
@@ -5865,8 +5882,12 @@ const { registerIpcRuntimeHandlers } = composeIpcRuntimeHandlers({
               : process.platform === 'win32'
                 ? 'win32'
                 : 'linux',
-        }),
-      getSessionBindings: () => appState.sessionBindings,
+        });
+      },
+      getSessionBindings: async () => {
+        await refreshMpvSessionBindings();
+        return appState.sessionBindings;
+      },
       getConfiguredShortcuts: () => getConfiguredShortcuts(),
       dispatchSessionAction: (request) => dispatchSessionAction(request),
       getStatsToggleKey: () => configService.getConfig().stats.toggleKey,
@@ -6003,6 +6024,7 @@ const { registerIpcRuntimeHandlers } = composeIpcRuntimeHandlers({
         appState.ankiIntegration?.setMediaTimingReviewCallback(
           mediaTimingReviewRuntime.requestReview,
         );
+        appState.ankiIntegration?.setSentenceFuriganaGenerator(generateMiningSentenceFurigana);
       },
       getKnownWordCacheStatePath: () => path.join(USER_DATA_PATH, 'known-words-cache.json'),
       getCachedMediaPath: (currentVideoPath, kind) =>
@@ -6649,6 +6671,17 @@ function setOverlayVisible(visible: boolean): void {
 }
 
 registerIpcRuntimeHandlers();
+registerSubtitleSelectionIpc({
+  ipc: ipcMain,
+  isAllowedSender: (sender) =>
+    [overlayManager.getMainWindow(), overlayManager.getModalWindow()].some(
+      (window) => window && !window.isDestroyed() && window.webContents === sender,
+    ),
+  runtime: createSubtitleSelectionRuntime({
+    isEnabled: () => configService.getConfig().subtitleSelection.enabled,
+    getMpvClient: () => appState.mpvClient,
+  }),
+});
 const subtitleGenerationRuntime = createSubtitleGenerationRuntime({
   getConfig: () => configService.getConfig().subtitleGeneration,
   getModelDirectory: () =>

src/main/runtime/composers/jellyfin-runtime-composer.test.ts

@@ -54,6 +54,7 @@ test('composeJellyfinRuntimeHandlers returns callable jellyfin runtime handlers'
       sleep: async () => {},
     },
     launchMpvIdleForJellyfinPlaybackMainDeps: {
+      getMpvExecutablePath: () => 'mpv',
       getSocketPath: () => '/tmp/test-mpv.sock',
       getLaunchMode: () => 'normal',
       platform: 'linux',

src/main/runtime/config-hot-reload-handlers.ts

@@ -163,7 +163,10 @@ export function createConfigHotReloadAppliedHandler(deps: ConfigHotReloadApplied
     deps.setKeybindings(payload.keybindings);
     deps.setSessionBindings(payload.sessionBindings, payload.sessionBindingWarnings);
 
-    if (diff.hotReloadFields.includes('shortcuts')) {
+    if (
+      diff.hotReloadFields.includes('shortcuts') ||
+      diff.hotReloadFields.includes('subtitleSelection')
+    ) {
       deps.refreshGlobalAndOverlayShortcuts();
     }
 

src/main/runtime/global-shortcuts-runtime-handlers.test.ts

@@ -20,6 +20,7 @@ function createShortcuts(): ConfiguredShortcuts {
     openRuntimeOptions: null,
     openJimaku: null,
     openTsukihime: null,
+    openSubtitleSelection: null,
     openSubtitleGeneration: null,
     openSessionHelp: null,
     openControllerSelect: null,

src/main/runtime/global-shortcuts.test.ts

@@ -24,6 +24,7 @@ function createShortcuts(): ConfiguredShortcuts {
     openRuntimeOptions: null,
     openJimaku: null,
     openTsukihime: null,
+    openSubtitleSelection: null,
     openSubtitleGeneration: null,
     openSessionHelp: null,
     openControllerSelect: null,

src/main/runtime/jellyfin-playback-launch.ts

@@ -165,7 +165,7 @@ export function createPlayJellyfinItemInMpvHandler(deps: {
     const mpvClient = deps.getMpvClient();
     if (!connected || !mpvClient) {
       throw new Error(
-        'MPV not connected and auto-launch failed. Ensure mpv is installed and available in PATH.',
+        'MPV not connected and auto-launch failed. Check mpv.executablePath or ensure mpv is available in PATH.',
       );
     }
 

src/main/runtime/jellyfin-remote-connection-main-deps.test.ts

@@ -32,6 +32,7 @@ test('launch mpv for jellyfin main deps builder maps callbacks', () => {
     },
   };
   const deps = createBuildLaunchMpvIdleForJellyfinPlaybackMainDepsHandler({
+    getMpvExecutablePath: () => '/usr/local/bin/mpv',
     getSocketPath: () => '/tmp/mpv.sock',
     getLaunchMode: () => 'fullscreen',
     platform: 'darwin',
@@ -47,8 +48,8 @@ test('launch mpv for jellyfin main deps builder maps callbacks', () => {
     getDefaultMpvLogPath: () => '/tmp/mpv.log',
     defaultMpvArgs: ['--no-config'],
     removeSocketPath: (socketPath) => calls.push(`rm:${socketPath}`),
-    spawnMpv: (args) => {
-      calls.push(`spawn:${args.join(' ')}`);
+    spawnMpv: (executablePath, args) => {
+      calls.push(`spawn:${executablePath} ${args.join(' ')}`);
       return proc;
     },
     logWarn: (message) => calls.push(`warn:${message}`),
@@ -60,14 +61,20 @@ test('launch mpv for jellyfin main deps builder maps callbacks', () => {
   assert.equal(deps.platform, 'darwin');
   assert.equal(deps.execPath, '/tmp/subminer');
   assert.equal(deps.getRuntimePluginEntrypoint?.(), '/tmp/plugin/subminer/main.lua');
-  assert.equal(deps.getInstalledPluginDetection?.().installed, false);
+  assert.equal(deps.getMpvExecutablePath(), '/usr/local/bin/mpv');
+  assert.equal(deps.getInstalledPluginDetection?.('/usr/local/bin/mpv').installed, false);
   assert.equal(deps.getDefaultMpvLogPath(), '/tmp/mpv.log');
   assert.deepEqual(deps.defaultMpvArgs, ['--no-config']);
   deps.removeSocketPath('/tmp/mpv.sock');
-  deps.spawnMpv(['--idle=yes']);
+  deps.spawnMpv('/usr/local/bin/mpv', ['--idle=yes']);
   deps.logInfo('launched');
   deps.logWarn('bad', null);
-  assert.deepEqual(calls, ['rm:/tmp/mpv.sock', 'spawn:--idle=yes', 'info:launched', 'warn:bad']);
+  assert.deepEqual(calls, [
+    'rm:/tmp/mpv.sock',
+    'spawn:/usr/local/bin/mpv --idle=yes',
+    'info:launched',
+    'warn:bad',
+  ]);
 });
 
 test('ensure mpv connected for jellyfin main deps builder maps callbacks', async () => {

src/main/runtime/jellyfin-remote-connection-main-deps.ts

@@ -16,6 +16,7 @@ export function createBuildLaunchMpvIdleForJellyfinPlaybackMainDepsHandler(
   deps: LaunchMpvForJellyfinDeps,
 ) {
   return (): LaunchMpvForJellyfinDeps => ({
+    getMpvExecutablePath: () => deps.getMpvExecutablePath(),
     getSocketPath: () => deps.getSocketPath(),
     getLaunchMode: () => deps.getLaunchMode(),
     platform: deps.platform,
@@ -26,7 +27,7 @@ export function createBuildLaunchMpvIdleForJellyfinPlaybackMainDepsHandler(
     getDefaultMpvLogPath: () => deps.getDefaultMpvLogPath(),
     defaultMpvArgs: deps.defaultMpvArgs,
     removeSocketPath: (socketPath: string) => deps.removeSocketPath(socketPath),
-    spawnMpv: (args: string[]) => deps.spawnMpv(args),
+    spawnMpv: (executablePath, args) => deps.spawnMpv(executablePath, args),
     logWarn: (message: string, error: unknown) => deps.logWarn(message, error),
     logInfo: (message: string) => deps.logInfo(message),
   });

src/main/runtime/jellyfin-remote-connection.test.ts

@@ -1,5 +1,7 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
+import { detectInstalledMpvPlugin } from './first-run-setup-plugin';
+import { resolveWindowsMpvPath } from './mpv-process';
 import {
   createEnsureMpvConnectedForJellyfinPlaybackHandler,
   createLaunchMpvIdleForJellyfinPlaybackHandler,
@@ -30,6 +32,7 @@ test('createLaunchMpvIdleForJellyfinPlaybackHandler builds expected mpv args', (
   const spawnedArgs: string[][] = [];
   const logs: string[] = [];
   const launch = createLaunchMpvIdleForJellyfinPlaybackHandler({
+    getMpvExecutablePath: () => 'mpv',
     getSocketPath: () => '/tmp/subminer.sock',
     getLaunchMode: () => 'maximized',
     platform: 'darwin',
@@ -39,7 +42,7 @@ test('createLaunchMpvIdleForJellyfinPlaybackHandler builds expected mpv args', (
     getDefaultMpvLogPath: () => ' /tmp/mp.log ',
     defaultMpvArgs: ['--sid=auto'],
     removeSocketPath: () => {},
-    spawnMpv: (args) => {
+    spawnMpv: (_executable, args) => {
       spawnedArgs.push(args);
       return {
         on: () => {},
@@ -67,6 +70,7 @@ test('createLaunchMpvIdleForJellyfinPlaybackHandler builds expected mpv args', (
 test('createLaunchMpvIdleForJellyfinPlaybackHandler forwards runtime plugin config', () => {
   const spawnedArgs: string[][] = [];
   const launch = createLaunchMpvIdleForJellyfinPlaybackHandler({
+    getMpvExecutablePath: () => 'mpv',
     getSocketPath: () => '/tmp/subminer.sock',
     getLaunchMode: () => 'normal',
     platform: 'linux',
@@ -84,7 +88,7 @@ test('createLaunchMpvIdleForJellyfinPlaybackHandler forwards runtime plugin conf
     getDefaultMpvLogPath: () => '/tmp/mp.log',
     defaultMpvArgs: ['--sid=auto'],
     removeSocketPath: () => {},
-    spawnMpv: (args) => {
+    spawnMpv: (_executable, args) => {
       spawnedArgs.push(args);
       return {
         on: () => {},
@@ -108,41 +112,53 @@ test('createLaunchMpvIdleForJellyfinPlaybackHandler forwards runtime plugin conf
   assert.doesNotMatch(scriptOpts ?? '', /subminer-aniskip_button_key=/);
 });
 
-test('createLaunchMpvIdleForJellyfinPlaybackHandler skips bundled script when installed plugin exists', () => {
-  const spawnedArgs: string[][] = [];
+test('Jellyfin detects portable plugins beside the executable selected for launch', () => {
+  const mpvPath = 'C:\\portable player\\mpv.exe';
+  const pluginPath = 'C:\\portable player\\portable_config\\scripts\\subminer\\main.lua';
+  for (const source of ['environment', 'PATH']) {
+    let resolutions = 0;
+    const spawned: Array<{ executable: string; args: string[] }> = [];
     const launch = createLaunchMpvIdleForJellyfinPlaybackHandler({
-    getSocketPath: () => '/tmp/subminer.sock',
+      getMpvExecutablePath: () => {
+        resolutions += 1;
+        return resolveWindowsMpvPath({
+          getEnv: () => (source === 'environment' ? mpvPath : undefined),
+          runWhere: () => ({ status: 0, stdout: mpvPath }),
+          fileExists: (candidate) => candidate === mpvPath,
+        });
+      },
+      getSocketPath: () => '\\\\.\\pipe\\subminer-test',
       getLaunchMode: () => 'normal',
-    platform: 'linux',
-    execPath: '/opt/SubMiner/SubMiner.AppImage',
-    getRuntimePluginEntrypoint: () => '/opt/SubMiner/plugin/subminer/main.lua',
-    getInstalledPluginDetection: () => ({
-      installed: true,
-      path: '/home/tester/.config/mpv/scripts/subminer/main.lua',
-      version: '0.1.0',
-      source: 'default-config',
-      message: null,
+      platform: 'win32',
+      execPath: 'C:\\SubMiner\\SubMiner.exe',
+      getRuntimePluginEntrypoint: () => 'C:\\SubMiner\\plugin\\subminer\\main.lua',
+      getInstalledPluginDetection: (mpvExecutablePath) =>
+        detectInstalledMpvPlugin({
+          platform: 'win32',
+          homeDir: 'C:\\Users\\test',
+          mpvExecutablePath,
+          existsSync: (candidate) => candidate === pluginPath,
         }),
-    getDefaultMpvLogPath: () => '/tmp/mp.log',
-    defaultMpvArgs: ['--sid=auto'],
+      getDefaultMpvLogPath: () => '',
+      defaultMpvArgs: [],
       removeSocketPath: () => {},
-    spawnMpv: (args) => {
-      spawnedArgs.push(args);
-      return {
-        on: () => {},
-        unref: () => {},
-      };
+      spawnMpv: (executable, args) => {
+        spawned.push({ executable, args });
+        return { on: () => {}, unref: () => {} };
       },
       logWarn: () => {},
       logInfo: () => {},
     });
 
     launch();
+    assert.equal(resolutions, 1, source);
+    assert.equal(spawned.length, 1);
+    assert.equal(spawned[0]!.executable, mpvPath);
     assert.equal(
-    spawnedArgs[0]?.some((arg) => arg.startsWith('--script=/opt/SubMiner/plugin/subminer')),
+      spawned[0]!.args.some((arg) => arg.startsWith('--script=')),
       false,
     );
-  assert.ok(spawnedArgs[0]?.some((arg) => arg.startsWith('--script-opts=')));
+  }
 });
 
 test('createEnsureMpvConnectedForJellyfinPlaybackHandler auto-launches once', async () => {

src/main/runtime/jellyfin-remote-connection.ts

@@ -41,23 +41,25 @@ export function createWaitForMpvConnectedHandler(deps: WaitForMpvConnectedDeps)
 }
 
 export type LaunchMpvForJellyfinDeps = {
+  getMpvExecutablePath: () => string;
   getSocketPath: () => string;
   getLaunchMode: () => MpvLaunchMode;
   platform: NodeJS.Platform;
   execPath: string;
   getRuntimePluginEntrypoint?: () => string | null | undefined;
-  getInstalledPluginDetection?: () => InstalledMpvPluginDetection;
+  getInstalledPluginDetection?: (mpvExecutablePath: string) => InstalledMpvPluginDetection;
   getPluginRuntimeConfig?: () => SubminerPluginRuntimeScriptOptConfig;
   getDefaultMpvLogPath: () => string;
   defaultMpvArgs: readonly string[];
   removeSocketPath: (socketPath: string) => void;
-  spawnMpv: (args: string[]) => SpawnedProcessLike;
+  spawnMpv: (executablePath: string, args: string[]) => SpawnedProcessLike;
   logWarn: (message: string, error: unknown) => void;
   logInfo: (message: string) => void;
 };
 
 export function createLaunchMpvIdleForJellyfinPlaybackHandler(deps: LaunchMpvForJellyfinDeps) {
   return (): void => {
+    const executablePath = deps.getMpvExecutablePath();
     const socketPath = deps.getSocketPath();
     if (deps.platform !== 'win32') {
       try {
@@ -78,7 +80,7 @@ export function createLaunchMpvIdleForJellyfinPlaybackHandler(deps: LaunchMpvFor
         )
       : [`subminer-binary_path=${deps.execPath}`, `subminer-socket_path=${socketPath}`];
     const scriptOpts = `--script-opts=${scriptOptParts.join(',')}`;
-    const installedPlugin = deps.getInstalledPluginDetection?.();
+    const installedPlugin = deps.getInstalledPluginDetection?.(executablePath);
     const runtimePluginEntrypoint = installedPlugin?.installed
       ? ''
       : (deps.getRuntimePluginEntrypoint?.()?.trim() ?? '');
@@ -95,7 +97,7 @@ export function createLaunchMpvIdleForJellyfinPlaybackHandler(deps: LaunchMpvFor
       ...(defaultMpvLogPath ? [`--log-file=${defaultMpvLogPath}`] : []),
       `--input-ipc-server=${socketPath}`,
     ];
-    const proc = deps.spawnMpv(mpvArgs);
+    const proc = deps.spawnMpv(executablePath, mpvArgs);
     proc.on('error', (error) => {
       deps.logWarn('Failed to launch mpv for Jellyfin remote playback', error);
     });

src/main/runtime/mpv-process.test.ts

@@ -0,0 +1,39 @@
+import assert from 'node:assert/strict';
+import { once } from 'node:events';
+import test from 'node:test';
+import { resolveMpvExecutablePath, spawnMpvProcess } from './mpv-process';
+
+const testWindows = process.platform === 'win32' ? test : test.skip;
+
+test('mpv process launcher forwards arguments and environment to the child', async () => {
+  const child = spawnMpvProcess(
+    process.execPath,
+    ['-e', 'process.exit(Number(process.env.SUBMINER_TEST_EXIT))'],
+    { ...process.env, DISPLAY: '', SUBMINER_TEST_EXIT: '17' },
+  );
+  try {
+    const [code] = await once(child, 'exit');
+    assert.equal(code, 17);
+  } finally {
+    if (child.exitCode === null) child.kill();
+  }
+});
+
+testWindows('managed Windows playback launches the configured executable', async () => {
+  const executable = resolveMpvExecutablePath(`  ${process.execPath}  `);
+  const child = spawnMpvProcess(executable, ['-e', 'process.exit(17)']);
+  try {
+    assert.equal(child.spawnfile, process.execPath);
+    const [code] = await once(child, 'exit');
+    assert.equal(code, 17);
+  } finally {
+    if (child.exitCode === null) child.kill();
+  }
+});
+
+testWindows('managed Windows playback rejects an invalid configured executable', () => {
+  assert.throws(
+    () => resolveMpvExecutablePath(`${process.execPath}/missing-mpv.exe`),
+    /Could not find mpv.exe/,
+  );
+});

src/main/runtime/mpv-process.ts

@@ -0,0 +1,112 @@
+import fs from 'node:fs';
+import { spawn, spawnSync } from 'node:child_process';
+import {
+  MPV_X11_BACKEND_ARGS,
+  applyX11EnvOverrides,
+  shouldForceX11WaylandSession,
+} from '../../shared/mpv-x11-backend';
+
+export interface WindowsMpvPathDeps {
+  getEnv: (name: string) => string | undefined;
+  runWhere: () => { status: number | null; stdout: string; error?: Error };
+  fileExists: (candidate: string) => boolean;
+}
+
+export type ConfiguredWindowsMpvPathStatus = 'blank' | 'configured' | 'invalid';
+
+function fileExists(candidate: string): boolean {
+  try {
+    return fs.statSync(candidate).isFile();
+  } catch {
+    return false;
+  }
+}
+
+export function getConfiguredWindowsMpvPathStatus(
+  configuredMpvPath = '',
+  exists: (candidate: string) => boolean = fileExists,
+): ConfiguredWindowsMpvPathStatus {
+  const configPath = configuredMpvPath.trim();
+  if (!configPath) {
+    return 'blank';
+  }
+  return exists(configPath) ? 'configured' : 'invalid';
+}
+
+export function createWindowsMpvPathDeps(
+  overrides: Partial<WindowsMpvPathDeps> = {},
+): WindowsMpvPathDeps {
+  return {
+    getEnv: overrides.getEnv ?? ((name) => process.env[name]),
+    fileExists: overrides.fileExists ?? fileExists,
+    runWhere:
+      overrides.runWhere ??
+      (() => {
+        const result = spawnSync('where.exe', ['mpv.exe'], {
+          encoding: 'utf8',
+          windowsHide: true,
+        });
+        return {
+          status: result.status,
+          stdout: result.stdout ?? '',
+          error: result.error ?? undefined,
+        };
+      }),
+  };
+}
+
+export function resolveWindowsMpvPath(deps: WindowsMpvPathDeps, configuredMpvPath = ''): string {
+  const configPath = configuredMpvPath.trim();
+  const configuredPathStatus = getConfiguredWindowsMpvPathStatus(configPath, deps.fileExists);
+  if (configuredPathStatus === 'configured') {
+    return configPath;
+  }
+  if (configuredPathStatus === 'invalid') {
+    return '';
+  }
+
+  const envPath = deps.getEnv('SUBMINER_MPV_PATH')?.trim();
+  if (envPath && deps.fileExists(envPath)) {
+    return envPath;
+  }
+
+  const whereResult = deps.runWhere();
+  if (whereResult.status === 0) {
+    const firstPath = whereResult.stdout
+      .split(/\r?\n/)
+      .map((line) => line.trim())
+      .find((line) => line.length > 0 && deps.fileExists(line));
+    if (firstPath) {
+      return firstPath;
+    }
+  }
+
+  return '';
+}
+
+export function spawnMpvProcess(
+  executablePath: string,
+  args: string[],
+  env: NodeJS.ProcessEnv = process.env,
+): ReturnType<typeof spawn> {
+  const forceX11 = shouldForceX11WaylandSession(env);
+  return spawn(executablePath, forceX11 ? [...args, ...MPV_X11_BACKEND_ARGS] : args, {
+    detached: true,
+    stdio: 'ignore',
+    windowsHide: true,
+    env: forceX11 ? applyX11EnvOverrides({ ...env }) : env,
+  });
+}
+
+export function resolveMpvExecutablePath(configuredMpvPath = ''): string {
+  const executablePath =
+    process.platform === 'win32'
+      ? resolveWindowsMpvPath(createWindowsMpvPathDeps(), configuredMpvPath)
+      : 'mpv';
+  if (!executablePath) {
+    throw new Error(
+      'Could not find mpv.exe. Check mpv.executablePath, SUBMINER_MPV_PATH, or PATH.',
+    );
+  }
+  return executablePath;
+}

src/main/runtime/session-bindings-runtime.test.ts

@@ -70,3 +70,69 @@ test('persistSessionBindings keeps saved bindings when mpv reload notification f
     fs.rmSync(root, { recursive: true, force: true });
   }
 });
+
+test('native prefix conflicts publish the same effective bindings to the overlay and plugin and recover', async () => {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-session-conflict-'));
+  const sequence: CompiledSessionBinding = {
+    sourcePath: 'shortcuts.openSubtitleSelection',
+    originalKey: 'g-s',
+    key: { code: 'KeyG-KeyS', modifiers: [] },
+    actionType: 'session-action',
+    actionId: 'openSubtitleSelection',
+  };
+  let nativeKeys: unknown = [];
+  let failDiscovery = false;
+  let published: CompiledSessionBinding[] = [];
+  const events: CompiledSessionBinding[][] = [];
+  const warnings: string[] = [];
+  const client = {
+    connected: true,
+    send: () => {},
+    requestProperty: async () => {
+      if (failDiscovery) throw new Error('temporarily unavailable');
+      return nativeKeys;
+    },
+  };
+  const runtime = createSessionBindingsRuntime({
+    configDir: root,
+    getKeybindings: () => [],
+    getConfiguredShortcuts: () => ({ multiCopyTimeoutMs: 1500 }) as never,
+    getResolvedConfig: () => ({ stats: { toggleKey: 's', markWatchedKey: 'w' } }) as ResolvedConfig,
+    getMpvClient: () => client,
+    setSessionBindings: (bindings) => {
+      published = bindings;
+    },
+    setSessionBindingsInitialized: () => {},
+    logWarn: () => {},
+    onBindingsChanged: (bindings) => events.push(bindings),
+    onWarning: (warning) => warnings.push(warning.message),
+  });
+  const readArtifact = () =>
+    JSON.parse(fs.readFileSync(path.join(root, 'session-bindings.json'), 'utf8'));
+  try {
+    runtime.persistSessionBindings([sequence]);
+    nativeKeys = [{ key: 'g', cmd: 'show-text single', priority: 1 }];
+    await runtime.refreshMpvSessionBindings();
+    assert.deepEqual(published, []);
+    assert.deepEqual(events.at(-1), readArtifact().bindings);
+    assert.equal(warnings.length, 1);
+    assert.match(warnings[0]!, /mpv input binding "g"/);
+    await runtime.refreshMpvSessionBindings();
+    assert.equal(events.length, 2, 'unchanged discovery must not create a reload loop');
+    assert.equal(warnings.length, 1);
+    failDiscovery = true;
+    await runtime.refreshMpvSessionBindings();
+    assert.deepEqual(published, [], 'failed discovery retains the known conflict');
+    failDiscovery = false;
+    nativeKeys = [{ key: 'Shift+g', cmd: 'show-text shifted', priority: 1 }];
+    await runtime.refreshMpvSessionBindings();
+    assert.deepEqual(published, [sequence]);
+    assert.equal(readArtifact().bindings[0].key.code, 'KeyG-KeyS');
+    assert.deepEqual(readArtifact().warnings, []);
+    client.connected = false;
+    await runtime.refreshMpvSessionBindings();
+    assert.deepEqual(published, [sequence]);
+  } finally {
+    fs.rmSync(root, { recursive: true, force: true });
+  }
+});

src/main/runtime/session-bindings-runtime.ts

@@ -6,16 +6,26 @@ import {
 import type { ConfiguredShortcuts } from '../../core/utils/shortcut-config';
 import type { CompiledSessionBinding, Keybinding, ResolvedConfig } from '../../types';
 import { writeSessionBindingsArtifact } from './session-bindings-artifact';
+import { parseMpvInputBindingKeys } from '../../shared/mpv-input-bindings';
+import {
+  reserveMpvSequencePrefixes,
+  resolveSessionSequenceConflicts,
+} from '../../shared/session-key-sequences';
+import type { SessionBindingWarning } from '../../types/session-bindings';
 
 export interface SessionBindingsRuntimeDeps {
   configDir: string;
   getKeybindings: () => Keybinding[];
   getConfiguredShortcuts: () => ConfiguredShortcuts;
   getResolvedConfig: () => ResolvedConfig;
-  getMpvClient: () => MpvRuntimeClientLike | null;
+  getMpvClient: () =>
+    | (MpvRuntimeClientLike & { requestProperty: (name: string) => Promise<unknown> })
+    | null;
   setSessionBindings: (bindings: CompiledSessionBinding[]) => void;
   setSessionBindingsInitialized: (initialized: boolean) => void;
   logWarn: (message: string, details?: unknown) => void;
+  onBindingsChanged?: (bindings: CompiledSessionBinding[]) => void;
+  onWarning?: (warning: SessionBindingWarning) => void;
 }
 
 export function createSessionBindingsRuntime(deps: SessionBindingsRuntimeDeps): {
@@ -24,7 +34,20 @@ export function createSessionBindingsRuntime(deps: SessionBindingsRuntimeDeps):
     warnings?: ReturnType<typeof compileSessionBindings>['warnings'],
   ) => void;
   refreshCurrentSessionBindings: () => void;
+  refreshMpvSessionBindings: () => Promise<void>;
 } {
+  let sourceBindings: CompiledSessionBinding[] = [];
+  let sourceWarnings: SessionBindingWarning[] = [];
+  let nativeSnapshot: {
+    client: ReturnType<SessionBindingsRuntimeDeps['getMpvClient']>;
+    keys: string[];
+  } | null = null;
+  let pending: {
+    client: ReturnType<SessionBindingsRuntimeDeps['getMpvClient']>;
+    promise: Promise<void>;
+  } | null = null;
+  let publishedSignature: string | null = null;
+  let reportedWarnings = new Set<string>();
   function resolveSessionBindingPlatform(): 'darwin' | 'win32' | 'linux' {
     if (process.platform === 'darwin') return 'darwin';
     if (process.platform === 'win32') return 'win32';
@@ -49,8 +72,27 @@ export function createSessionBindingsRuntime(deps: SessionBindingsRuntimeDeps):
     bindings: CompiledSessionBinding[],
     warnings: ReturnType<typeof compileSessionBindings>['warnings'] = [],
   ): void {
+    sourceBindings = bindings;
+    sourceWarnings = warnings;
+    publishBindings();
+  }
+
+  function publishBindings(): void {
+    const client = deps.getMpvClient();
+    const keys = client?.connected && nativeSnapshot?.client === client ? nativeSnapshot.keys : [];
+    const result = resolveSessionSequenceConflicts(
+      sourceBindings,
+      reserveMpvSequencePrefixes(keys),
+    );
+    const warnings = [...sourceWarnings, ...result.warnings];
+    const signature = JSON.stringify([
+      result.bindings,
+      warnings,
+      deps.getConfiguredShortcuts().multiCopyTimeoutMs,
+    ]);
+    if (signature === publishedSignature) return;
     const artifact = buildPluginSessionBindingsArtifact({
-      bindings,
+      bindings: result.bindings,
       warnings,
       numericSelectionTimeoutMs: deps.getConfiguredShortcuts().multiCopyTimeoutMs,
     });
@@ -60,8 +102,16 @@ export function createSessionBindingsRuntime(deps: SessionBindingsRuntimeDeps):
       deps.logWarn('[session-bindings] Failed to write session bindings artifact');
       throw error;
     }
-    deps.setSessionBindings(bindings);
+    publishedSignature = signature;
+    deps.setSessionBindings(result.bindings);
     deps.setSessionBindingsInitialized(true);
+    const nextWarnings = new Set(warnings.map((warning) => warning.message));
+    for (const warning of warnings) {
+      if (reportedWarnings.has(warning.message)) continue;
+      deps.logWarn(`[session-bindings] ${warning.message}`);
+      deps.onWarning?.(warning);
+    }
+    reportedWarnings = nextWarnings;
     const mpvClient = deps.getMpvClient();
     if (mpvClient?.connected) {
       try {
@@ -70,15 +120,41 @@ export function createSessionBindingsRuntime(deps: SessionBindingsRuntimeDeps):
         deps.logWarn('[session-bindings] Failed to notify mpv to reload session bindings', error);
       }
     }
+    deps.onBindingsChanged?.(result.bindings);
+  }
+
+  async function refreshMpvSessionBindings(): Promise<void> {
+    const client = deps.getMpvClient();
+    if (!client?.connected) {
+      nativeSnapshot = null;
+      publishBindings();
+      return;
+    }
+    if (pending?.client === client) return pending.promise;
+    const promise = (async () => {
+      try {
+        const raw = await client.requestProperty('input-bindings');
+        if (client !== deps.getMpvClient() || !client.connected) return;
+        nativeSnapshot = { client, keys: parseMpvInputBindingKeys(raw, { includeIgnored: false }) };
+        publishBindings();
+      } catch {
+        // Keep the last successful snapshot if discovery is temporarily unavailable.
+      }
+    })();
+    const request = { client, promise };
+    pending = request;
+    try {
+      await promise;
+    } finally {
+      if (pending === request) pending = null;
+    }
   }
 
   function refreshCurrentSessionBindings(): void {
     const compiled = compileCurrentSessionBindings();
-    for (const warning of compiled.warnings) {
-      deps.logWarn(`[session-bindings] ${warning.message}`);
-    }
     persistSessionBindings(compiled.bindings, compiled.warnings);
+    void refreshMpvSessionBindings();
   }
 
-  return { persistSessionBindings, refreshCurrentSessionBindings };
+  return { persistSessionBindings, refreshCurrentSessionBindings, refreshMpvSessionBindings };
 }

src/main/runtime/stats-server-runtime.ts

@@ -1,3 +1,4 @@
+import { generateSentenceFurigana } from '../../core/services/tokenizer/sentence-furigana';
 import path from 'node:path';
 import type { BrowserWindow } from 'electron';
 import {
@@ -166,6 +167,8 @@ export function createStatsServerRuntime(deps: StatsServerRuntimeDeps): {
       }),
       resolveAnkiNoteId: (noteId: number) => deps.resolveAnkiNoteId(noteId),
       resolveSentenceSearchHeadwords: (term: string) => deps.resolveSentenceSearchHeadwords(term),
+      generateSentenceFurigana: (text, highlightedText) =>
+        generateSentenceFurigana(text, highlightedText, yomitanDeps, yomitanLogger),
       addYomitanNote: async (word: string) => {
         const ankiConnectConfig = deps.getResolvedConfig().ankiConnect;
         const ankiUrl = ankiConnectConfig.url || 'http://127.0.0.1:8765';

src/main/runtime/subtitle-selection.test.ts

@@ -0,0 +1,101 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { createSubtitleSelectionRuntime } from './subtitle-selection';
+
+function setup() {
+  let enabled = true;
+  const properties = new Map<string, unknown>([
+    ['path', '/video.mkv'],
+    [
+      'track-list',
+      [
+        { id: 1, type: 'audio' },
+        { id: 2, type: 'sub', title: 'Japanese', lang: 'ja', codec: 'ass' },
+        { id: 3, type: 'sub', title: 'English', lang: 'en', external: true },
+        { id: '4', type: 'sub' },
+      ],
+    ],
+    ['sid', 2],
+    ['secondary-sid', 3],
+  ]);
+  const commands: unknown[][] = [];
+  const client = {
+    connected: true,
+    requestProperty: async (name: string) => properties.get(name),
+    request: async (command: unknown[]) => {
+      commands.push(command);
+      return { error: 'success' };
+    },
+  };
+  const runtime = createSubtitleSelectionRuntime({
+    isEnabled: () => enabled,
+    getMpvClient: () => client,
+  });
+  return {
+    runtime,
+    properties,
+    commands,
+    client,
+    disable: () => {
+      enabled = false;
+    },
+  };
+}
+
+test('subtitle selector lists only valid subtitle tracks and current selections', async () => {
+  const { runtime, properties } = setup();
+  assert.deepEqual(await runtime.getState(), {
+    mediaPath: '/video.mkv',
+    primary: 2,
+    secondary: 3,
+    tracks: [
+      { id: 2, label: '#2 · Japanese · ja · ass' },
+      { id: 3, label: '#3 · English · en · external' },
+    ],
+  });
+  properties.set('sid', 'no');
+  properties.set('secondary-sid', false);
+  const state = await runtime.getState();
+  assert.equal(state.primary, null);
+  assert.equal(state.secondary, null);
+});
+
+test('subtitle selector swaps tracks and supports disabling both tracks', async () => {
+  const { runtime, commands } = setup();
+  await runtime.apply({ mediaPath: '/video.mkv', primary: 3, secondary: 2 });
+  assert.deepEqual(commands, [
+    ['set_property', 'secondary-sid', 'no'],
+    ['set_property', 'sid', 3],
+    ['set_property', 'secondary-sid', 2],
+  ]);
+  commands.length = 0;
+  await runtime.apply({ mediaPath: '/video.mkv', primary: null, secondary: null });
+  assert.ok(commands.every((command) => command[2] === 'no'));
+});
+
+test('subtitle selector rejects stale media, unavailable tracks, duplicate tracks and malformed requests without mutation', async () => {
+  const { runtime, commands } = setup();
+  for (const request of [
+    { mediaPath: '/other.mkv', primary: 2, secondary: 3 },
+    { mediaPath: '/video.mkv', primary: 99, secondary: null },
+    { mediaPath: '/video.mkv', primary: 2, secondary: 2 },
+    { mediaPath: '/video.mkv', primary: '2', secondary: null },
+    { mediaPath: '/video.mkv', primary: -1, secondary: null },
+    null,
+  ])
+    await assert.rejects(runtime.apply(request));
+  assert.deepEqual(commands, []);
+});
+
+test('subtitle selector gates access on config and connection and propagates mpv failures', async () => {
+  const { runtime, client, disable } = setup();
+  client.request = async () => ({ error: 'property unavailable' });
+  await assert.rejects(
+    runtime.apply({ mediaPath: '/video.mkv', primary: 3, secondary: 2 }),
+    /property unavailable/,
+  );
+  client.connected = false;
+  await assert.rejects(runtime.getState(), /Connect to mpv/);
+  disable();
+  await assert.rejects(runtime.getState(), /Enable subtitle selection/);
+});

src/main/runtime/subtitle-selection.ts

@@ -0,0 +1,117 @@
+import type { IpcMain, WebContents } from 'electron';
+import { IPC_CHANNELS } from '../../shared/ipc/contracts';
+import {
+  parseSubtitleSelectionRequest,
+  type SubtitleSelectionState,
+} from '../../shared/subtitle-selection';
+import { openOverlayHostedModal, retryOverlayModalOpen } from './overlay-hosted-modal-open';
+
+interface SelectionMpvClient {
+  connected: boolean;
+  requestProperty: (name: string) => Promise<unknown>;
+  request: (command: unknown[]) => Promise<{ error?: string }>;
+}
+
+export function openSubtitleSelectionModal(
+  deps: Parameters<typeof openOverlayHostedModal>[0] & Parameters<typeof retryOverlayModalOpen>[0],
+): Promise<boolean> {
+  return retryOverlayModalOpen(deps, {
+    modal: 'subtitle-selection',
+    timeoutMs: 1500,
+    retryWarning: 'Subtitle selection modal did not acknowledge opening; retrying.',
+    sendOpen: () =>
+      openOverlayHostedModal(deps, {
+        channel: IPC_CHANNELS.event.subtitleSelectionOpen,
+        modal: 'subtitle-selection',
+        preferModalWindow: true,
+      }),
+  });
+}
+
+export function createSubtitleSelectionRuntime(deps: {
+  isEnabled: () => boolean;
+  getMpvClient: () => SelectionMpvClient | null;
+}) {
+  function getClient(): SelectionMpvClient {
+    if (!deps.isEnabled()) throw new Error('Enable subtitle selection in Settings first.');
+    const client = deps.getMpvClient();
+    if (!client?.connected) throw new Error('Connect to mpv first.');
+    return client;
+  }
+
+  async function readState(client: SelectionMpvClient): Promise<SubtitleSelectionState> {
+    const mediaPath = await client.requestProperty('path');
+    if (typeof mediaPath !== 'string' || !mediaPath) throw new Error('Open a video first.');
+    const [rawTracks, primary, secondary] = await Promise.all([
+      client.requestProperty('track-list'),
+      client.requestProperty('sid'),
+      client.requestProperty('secondary-sid'),
+    ]);
+    const tracks: SubtitleSelectionState['tracks'] = [];
+    const candidates: unknown[] = Array.isArray(rawTracks) ? rawTracks : [];
+    for (const track of candidates) {
+      if (
+        typeof track !== 'object' ||
+        track === null ||
+        !('type' in track) ||
+        track.type !== 'sub' ||
+        !('id' in track) ||
+        typeof track.id !== 'number' ||
+        !Number.isSafeInteger(track.id) ||
+        track.id <= 0
+      )
+        continue;
+      const details = [
+        'title' in track ? track.title : undefined,
+        'lang' in track ? track.lang : undefined,
+        'codec' in track ? track.codec : undefined,
+      ].filter((value): value is string => typeof value === 'string' && value.length > 0);
+      if ('external' in track && track.external === true) details.push('external');
+      tracks.push({ id: track.id, label: `#${track.id} · ${details.join(' · ') || 'Subtitle'}` });
+    }
+    if ((await client.requestProperty('path')) !== mediaPath)
+      throw new Error('The video changed. Reopen subtitle selection.');
+    const selected = (value: unknown): number | null =>
+      tracks.find((track) => track.id === value)?.id ?? null;
+    return { mediaPath, tracks, primary: selected(primary), secondary: selected(secondary) };
+  }
+
+  async function apply(value: unknown): Promise<void> {
+    const selection = parseSubtitleSelectionRequest(value);
+    const client = getClient();
+    const current = await readState(client);
+    if (current.mediaPath !== selection.mediaPath)
+      throw new Error('The video changed. Reopen subtitle selection.');
+    for (const id of [selection.primary, selection.secondary]) {
+      if (id !== null && !current.tracks.some((track) => track.id === id))
+        throw new Error('A selected track is no longer available. Reopen subtitle selection.');
+    }
+    const set = async (property: string, id: number | null): Promise<void> => {
+      const response = await client.request(['set_property', property, id ?? 'no']);
+      if (response.error && response.error !== 'success') throw new Error(response.error);
+    };
+    // Clear secondary first so swapping the two tracks works in mpv.
+    await set('secondary-sid', null);
+    await set('sid', selection.primary);
+    await set('secondary-sid', selection.secondary);
+  }
+
+  return { getState: async () => readState(getClient()), apply };
+}
+
+export function registerSubtitleSelectionIpc(deps: {
+  ipc: Pick<IpcMain, 'handle'>;
+  isAllowedSender: (sender: WebContents) => boolean;
+  runtime: ReturnType<typeof createSubtitleSelectionRuntime>;
+}): void {
+  deps.ipc.handle(IPC_CHANNELS.request.getSubtitleSelection, (event) => {
+    if (!deps.isAllowedSender(event.sender))
+      throw new Error('Subtitle selection requires the overlay.');
+    return deps.runtime.getState();
+  });
+  deps.ipc.handle(IPC_CHANNELS.request.applySubtitleSelection, (event, value: unknown) => {
+    if (!deps.isAllowedSender(event.sender))
+      throw new Error('Subtitle selection requires the overlay.');
+    return deps.runtime.apply(value);
+  });
+}

src/main/runtime/windows-mpv-launch.test.ts

@@ -29,12 +29,12 @@ test('resolveWindowsMpvPath prefers SUBMINER_MPV_PATH', () => {
   assert.equal(resolved, 'C:\\mpv\\mpv.exe');
 });
 
-test('resolveWindowsMpvPath prefers configured executable path before PATH', () => {
+test('resolveWindowsMpvPath prefers configured executable path before environment and PATH', () => {
   const resolved = resolveWindowsMpvPath(
     createDeps({
-      getEnv: () => undefined,
+      getEnv: () => 'C:\\other\\mpv.exe',
       runWhere: () => ({ status: 0, stdout: 'C:\\tools\\mpv.exe\r\n' }),
-      fileExists: (candidate) => candidate === 'C:\\mpv\\mpv.exe',
+      fileExists: (candidate) => ['C:\\mpv\\mpv.exe', 'C:\\other\\mpv.exe'].includes(candidate),
     }),
     '  C:\\mpv\\mpv.exe  ',
   );
@@ -53,6 +53,16 @@ test('resolveWindowsMpvPath falls back to where.exe output', () => {
   assert.equal(resolved, 'C:\\tools\\mpv.exe');
 });
 
+test('resolveWindowsMpvPath ignores an invalid environment override but keeps config authoritative', () => {
+  const deps = createDeps({
+    getEnv: () => 'C:\\missing\\mpv.exe',
+    runWhere: () => ({ status: 0, stdout: 'C:\\tools\\mpv.exe\r\n' }),
+    fileExists: (candidate) => candidate === 'C:\\tools\\mpv.exe',
+  });
+  assert.equal(resolveWindowsMpvPath(deps), 'C:\\tools\\mpv.exe');
+  assert.equal(resolveWindowsMpvPath(deps, 'C:\\missing\\mpv.exe'), '');
+});
+
 test('buildWindowsMpvLaunchArgs uses explicit SubMiner defaults and targets', () => {
   assert.deepEqual(
     buildWindowsMpvLaunchArgs(

src/main/runtime/windows-mpv-launch.ts

@@ -1,5 +1,3 @@
-import fs from 'node:fs';
-import { spawn, spawnSync } from 'node:child_process';
 import { isLogFileEnabled } from '../../shared/log-files';
 import { canConnectSocket } from '../../shared/socket-probe';
 import { buildMpvLaunchModeArgs } from '../../shared/mpv-launch-mode';
@@ -8,11 +6,19 @@ import { buildSubminerPluginRuntimeScriptOptParts } from '../../shared/subminer-
 import type { MpvLaunchMode } from '../../types/config';
 import type { SubminerPluginRuntimeScriptOptConfig } from '../../shared/subminer-plugin-script-opts';
 import type { InstalledMpvPluginDetection } from './first-run-setup-plugin';
+import {
+  createWindowsMpvPathDeps,
+  resolveWindowsMpvPath,
+  spawnMpvProcess,
+  type WindowsMpvPathDeps,
+} from './mpv-process';
+export {
+  getConfiguredWindowsMpvPathStatus,
+  resolveWindowsMpvPath,
+  type ConfiguredWindowsMpvPathStatus,
+} from './mpv-process';
 
-export interface WindowsMpvLaunchDeps {
-  getEnv: (name: string) => string | undefined;
-  runWhere: () => { status: number | null; stdout: string; error?: Error };
-  fileExists: (candidate: string) => boolean;
+export interface WindowsMpvLaunchDeps extends WindowsMpvPathDeps {
   spawnDetached: (command: string, args: string[], env?: NodeJS.ProcessEnv) => Promise<void>;
   isAppControlServerAvailable?: () => Promise<boolean>;
   sendAppControlCommand?: (
@@ -23,8 +29,6 @@ export interface WindowsMpvLaunchDeps {
   logInfo?: (message: string) => void;
 }
 
-export type ConfiguredWindowsMpvPathStatus = 'blank' | 'configured' | 'invalid';
-
 export interface WindowsMpvRuntimePluginPolicy {
   detectInstalledMpvPlugin?: (mpvPath: string) => InstalledMpvPluginDetection;
   notifyInstalledPluginDetected?: (detection: InstalledMpvPluginDetection) => void;
@@ -38,54 +42,6 @@ function normalizeCandidate(candidate: string | undefined): string {
   return typeof candidate === 'string' ? candidate.trim() : '';
 }
 
-function defaultWindowsMpvFileExists(candidate: string): boolean {
-  try {
-    return fs.statSync(candidate).isFile();
-  } catch {
-    return false;
-  }
-}
-
-export function getConfiguredWindowsMpvPathStatus(
-  configuredMpvPath = '',
-  fileExists: (candidate: string) => boolean = defaultWindowsMpvFileExists,
-): ConfiguredWindowsMpvPathStatus {
-  const configPath = normalizeCandidate(configuredMpvPath);
-  if (!configPath) {
-    return 'blank';
-  }
-  return fileExists(configPath) ? 'configured' : 'invalid';
-}
-
-export function resolveWindowsMpvPath(deps: WindowsMpvLaunchDeps, configuredMpvPath = ''): string {
-  const configPath = normalizeCandidate(configuredMpvPath);
-  const configuredPathStatus = getConfiguredWindowsMpvPathStatus(configPath, deps.fileExists);
-  if (configuredPathStatus === 'configured') {
-    return configPath;
-  }
-  if (configuredPathStatus === 'invalid') {
-    return '';
-  }
-
-  const envPath = normalizeCandidate(deps.getEnv('SUBMINER_MPV_PATH'));
-  if (envPath && deps.fileExists(envPath)) {
-    return envPath;
-  }
-
-  const whereResult = deps.runWhere();
-  if (whereResult.status === 0) {
-    const firstPath = whereResult.stdout
-      .split(/\r?\n/)
-      .map((line) => line.trim())
-      .find((line) => line.length > 0 && deps.fileExists(line));
-    if (firstPath) {
-      return firstPath;
-    }
-  }
-
-  return '';
-}
-
 const DEFAULT_WINDOWS_MPV_SOCKET = '\\\\.\\pipe\\subminer-socket';
 const RUNNING_APP_ATTACH_SOCKET_WAIT_MS = 10000;
 
@@ -332,19 +288,7 @@ export function createWindowsMpvLaunchDeps(options: {
   logInfo?: (message: string) => void;
 }): WindowsMpvLaunchDeps {
   return {
-    getEnv: options.getEnv ?? ((name) => process.env[name]),
-    runWhere: () => {
-      const result = spawnSync('where.exe', ['mpv.exe'], {
-        encoding: 'utf8',
-        windowsHide: true,
-      });
-      return {
-        status: result.status,
-        stdout: result.stdout ?? '',
-        error: result.error ?? undefined,
-      };
-    },
-    fileExists: options.fileExists ?? defaultWindowsMpvFileExists,
+    ...createWindowsMpvPathDeps(options),
     isAppControlServerAvailable: options.isAppControlServerAvailable,
     sendAppControlCommand: options.sendAppControlCommand,
     waitForSocketReady,
@@ -352,12 +296,11 @@ export function createWindowsMpvLaunchDeps(options: {
     spawnDetached: (command, args, env) =>
       new Promise((resolve, reject) => {
         try {
-          const child = spawn(command, args, {
-            detached: true,
-            stdio: 'ignore',
-            windowsHide: true,
-            env: env ? { ...process.env, ...env } : process.env,
-          });
+          const child = spawnMpvProcess(
+            command,
+            args,
+            env ? { ...process.env, ...env } : process.env,
+          );
           let settled = false;
           child.once('error', (error) => {
             if (settled) return;

src/preload.ts

@@ -81,6 +81,7 @@ import { IPC_CHANNELS } from './shared/ipc/contracts';
 import type { SubtitleGenerationProgress } from './shared/subtitle-generation';
 
 const overlayLayer = resolveOverlayLayerFromArgv(process.argv);
+const onSubtitleSelectionOpen = createQueuedIpcListener(IPC_CHANNELS.event.subtitleSelectionOpen);
 const onSubtitleGenerationOpen = createQueuedIpcListener(IPC_CHANNELS.event.subtitleGenerationOpen);
 
 type EmptyListener = () => void;
@@ -463,6 +464,11 @@ const electronAPI: ElectronAPI = {
     ) as Promise<boolean>,
   getSubtitleStyle: (): Promise<SubtitleStyleConfig | null> =>
     ipcRenderer.invoke(IPC_CHANNELS.request.getSubtitleStyle),
+  onSubtitleSelectionOpen,
+  getSubtitleSelection: () => ipcRenderer.invoke(IPC_CHANNELS.request.getSubtitleSelection),
+  applySubtitleSelection: (
+    request: import('./shared/subtitle-selection').SubtitleSelectionRequest,
+  ) => ipcRenderer.invoke(IPC_CHANNELS.request.applySubtitleSelection, request),
   onSubsyncManualOpen: onSubsyncManualOpenEvent,
   runSubsyncManual: (request: SubsyncManualRunRequest): Promise<SubsyncResult> =>
     ipcRenderer.invoke(IPC_CHANNELS.request.runSubsyncManual, request),
@@ -580,6 +586,14 @@ const electronAPI: ElectronAPI = {
   reportOverlayContentBounds: (measurement: OverlayContentMeasurement) => {
     ipcRenderer.send(IPC_CHANNELS.command.reportOverlayContentBounds, measurement);
   },
+  onSessionBindingsChanged: (
+    callback: (bindings: import('./types').CompiledSessionBinding[]) => void,
+  ) => {
+    ipcRenderer.on(
+      IPC_CHANNELS.event.sessionBindingsChanged,
+      (_event, bindings: import('./types').CompiledSessionBinding[]) => callback(bindings),
+    );
+  },
   onConfigHotReload: (callback: (payload: ConfigHotReloadPayload) => void) => {
     ipcRenderer.on(
       IPC_CHANNELS.event.configHotReload,

src/renderer/controller-interaction-blocking.ts

@@ -4,6 +4,7 @@ type ControllerInteractionModalState = {
   jimakuModalOpen: boolean;
   kikuModalOpen: boolean;
   runtimeOptionsModalOpen: boolean;
+  subtitleSelectionModalOpen?: boolean;
   subsyncModalOpen: boolean;
   subtitleGenerationModalOpen?: boolean;
   youtubePickerModalOpen: boolean;
@@ -18,6 +19,7 @@ export function isControllerInteractionBlocked(state: ControllerInteractionModal
     state.jimakuModalOpen ||
     state.kikuModalOpen ||
     state.runtimeOptionsModalOpen ||
+    state.subtitleSelectionModalOpen ||
     state.subsyncModalOpen ||
     Boolean(state.subtitleGenerationModalOpen) ||
     state.youtubePickerModalOpen ||

src/renderer/handlers/keyboard.test.ts

@@ -92,6 +92,7 @@ function createEmptyShortcuts(): ConfiguredShortcuts {
     openRuntimeOptions: null,
     openJimaku: null,
     openTsukihime: null,
+    openSubtitleSelection: null,
     openSubtitleGeneration: null,
     openSessionHelp: null,
     openControllerSelect: null,
@@ -2404,3 +2405,86 @@ test('stalled mpv discovery does not delay configured overlay controls', async (
     testGlobals.restore();
   }
 });
+
+test('session binding: g-s opens subtitle selection only after the complete sequence', async () => {
+  const { handlers, testGlobals } = createKeyboardHandlerHarness();
+  try {
+    await handlers.setupMpvInputForwarding();
+    handlers.updateSessionBindings([
+      {
+        sourcePath: 'shortcuts.openSubtitleSelection',
+        originalKey: 'g-s',
+        key: { code: 'KeyG-KeyS', modifiers: [] },
+        actionType: 'session-action',
+        actionId: 'openSubtitleSelection',
+      },
+    ]);
+    testGlobals.dispatchKeydown({ key: 's', code: 'KeyS' });
+    testGlobals.dispatchKeydown({ key: 'g', code: 'KeyG' });
+    assert.deepEqual(testGlobals.sessionActions, []);
+    testGlobals.dispatchKeydown({ key: 's', code: 'KeyS' });
+    assert.deepEqual(testGlobals.sessionActions, [
+      { actionId: 'openSubtitleSelection', payload: undefined },
+    ]);
+    testGlobals.dispatchKeydown({ key: 'g', code: 'KeyG' });
+    handlers.updateSessionBindings([]);
+    testGlobals.dispatchKeydown({ key: 's', code: 'KeyS' });
+    assert.equal(testGlobals.sessionActions.length, 1);
+  } finally {
+    testGlobals.restore();
+  }
+});
+
+test('single-key actions run immediately even if a conflicting sequence reaches the renderer', async () => {
+  const { handlers, testGlobals } = createKeyboardHandlerHarness();
+  try {
+    await handlers.setupMpvInputForwarding();
+    handlers.updateSessionBindings([
+      {
+        sourcePath: 'sequence',
+        originalKey: 'g-s',
+        key: { code: 'KeyG-KeyS', modifiers: [] },
+        actionType: 'session-action',
+        actionId: 'openSubtitleSelection',
+      },
+      {
+        sourcePath: 'single',
+        originalKey: 'g',
+        key: { code: 'KeyG', modifiers: [] },
+        actionType: 'mpv-command',
+        command: ['show-text', 'single'],
+      },
+    ]);
+    testGlobals.dispatchKeydown({ key: 'g', code: 'KeyG' });
+    assert.deepEqual(testGlobals.mpvCommands, [['show-text', 'single']]);
+    testGlobals.dispatchKeydown({ key: 's', code: 'KeyS' });
+    assert.deepEqual(testGlobals.sessionActions, []);
+  } finally {
+    testGlobals.restore();
+  }
+});
+
+test('an unfinished built-in y chord cannot start a configured sequence', async () => {
+  const { handlers, testGlobals } = createKeyboardHandlerHarness();
+  try {
+    await handlers.setupMpvInputForwarding();
+    handlers.updateSessionBindings([
+      {
+        sourcePath: 'sequence',
+        originalKey: 'g-s',
+        key: { code: 'KeyG-KeyS', modifiers: [] },
+        actionType: 'session-action',
+        actionId: 'openSubtitleSelection',
+      },
+    ]);
+    testGlobals.dispatchKeydown({ key: 'y', code: 'KeyY' });
+    testGlobals.dispatchKeydown({ key: 'g', code: 'KeyG' });
+    testGlobals.dispatchKeydown({ key: 's', code: 'KeyS' });
+    assert.deepEqual(testGlobals.sessionActions, []);
+    testGlobals.dispatchKeydown({ key: 'g', code: 'KeyG' });
+    testGlobals.dispatchKeydown({ key: 's', code: 'KeyS' });
+    assert.equal(testGlobals.sessionActions.length, 1);
+  } finally {
+    testGlobals.restore();
+  }
+});

src/renderer/handlers/keyboard.ts

@@ -15,6 +15,7 @@ export function createKeyboardHandlers(
     handleRuntimeOptionsKeydown: (e: KeyboardEvent) => boolean;
     handleCharacterDictionaryKeydown: (e: KeyboardEvent) => boolean;
     handleSubsyncKeydown: (e: KeyboardEvent) => boolean;
+    handleSubtitleSelectionKeydown?: (e: KeyboardEvent) => boolean;
     handleSubtitleGenerationKeydown?: (e: KeyboardEvent) => boolean;
     handleKikuKeydown: (e: KeyboardEvent) => boolean;
     handleJimakuKeydown: (e: KeyboardEvent) => boolean;
@@ -133,7 +134,10 @@ export function createKeyboardHandlers(
     updateConfiguredShortcuts(shortcuts, statsToggleKey, markWatchedKey);
   }
 
+  let pendingSequence: { prefix: string; expires: number } | null = null;
+
   function updateSessionBindings(bindings: CompiledSessionBinding[]): void {
+    pendingSequence = null;
     ctx.state.sessionBindings = bindings;
     ctx.state.sessionBindingMap = new Map(
       bindings.map((binding) => [keyEventToStringFromBinding(binding), binding]),
@@ -1049,7 +1053,10 @@ export function createKeyboardHandlers(
     window.addEventListener('focus', () => {
       void importedMpvBindings.refresh();
     });
-    window.addEventListener('blur', importedMpvBindings.releaseAll);
+    window.addEventListener('blur', () => {
+      pendingSequence = null;
+      importedMpvBindings.releaseAll();
+    });
     window.addEventListener('beforeunload', () => {
       clearTimeout(lateScriptRefresh);
       importedMpvBindings.dispose();
@@ -1103,6 +1110,13 @@ export function createKeyboardHandlers(
     );
 
     document.addEventListener('keydown', (e: KeyboardEvent) => {
+      const sequence = pendingSequence;
+      pendingSequence = null;
+      if (ctx.state.subtitleSelectionModalOpen) {
+        pendingSequence = null;
+        options.handleSubtitleSelectionKeydown?.(e);
+        return;
+      }
       if (ctx.state.subtitleGenerationModalOpen) {
         options.handleSubtitleGenerationKeydown?.(e);
         return;
@@ -1187,6 +1201,7 @@ export function createKeyboardHandlers(
       }
 
       if (isTextEntryTarget(e.target)) {
+        pendingSequence = null;
         return;
       }
 
@@ -1194,6 +1209,16 @@ export function createKeyboardHandlers(
         return;
       }
 
+      const sequenceKey = keyEventToString(e);
+      if (sequence && !ctx.state.chordPending && Date.now() <= sequence.expires && !e.repeat) {
+        const binding = ctx.state.sessionBindingMap.get(`${sequence.prefix}-${sequenceKey}`);
+        if (binding) {
+          e.preventDefault();
+          dispatchSessionBinding(binding);
+          return;
+        }
+      }
+
       if (isStatsOverlayToggle(e)) {
         e.preventDefault();
         window.electronAPI.toggleStatsOverlay();
@@ -1276,6 +1301,16 @@ export function createKeyboardHandlers(
         dispatchSessionBinding(binding);
         return;
       }
+      if (
+        !e.repeat &&
+        ctx.state.sessionBindings.some((binding) =>
+          keyEventToStringFromBinding(binding).startsWith(`${sequenceKey}-`),
+        )
+      ) {
+        pendingSequence = { prefix: sequenceKey, expires: Date.now() + 1000 };
+        e.preventDefault();
+        return;
+      }
       if (
         keyboardConfigLoaded &&
         !ctx.state.playlistBrowserModalOpen &&

src/renderer/index.html

@@ -833,6 +833,43 @@
           </div>
         </div>
       </div>
+      <div id="subtitleSelectionModal" class="modal hidden" aria-hidden="true">
+        <div
+          class="modal-content subsync-modal-content"
+          role="dialog"
+          aria-modal="true"
+          aria-labelledby="subtitleSelectionTitle"
+        >
+          <div class="modal-header">
+            <h2 id="subtitleSelectionTitle">Select subtitles</h2>
+            <button id="subtitleSelectionClose" class="modal-close" type="button">Close</button>
+          </div>
+          <div class="modal-body">
+            <div class="subsync-form">
+              <label class="subsync-field">
+                <span>Primary subtitle</span>
+                <select id="subtitleSelectionPrimary"></select>
+              </label>
+              <label class="subsync-field">
+                <span>Secondary subtitle</span>
+                <select id="subtitleSelectionSecondary"></select>
+              </label>
+            </div>
+            <div
+              id="subtitleSelectionStatus"
+              class="runtime-options-status"
+              role="status"
+              aria-live="polite"
+            ></div>
+            <div class="subsync-footer">
+              <button id="subtitleSelectionApply" class="kiku-confirm-button" type="button">
+                Apply
+              </button>
+            </div>
+          </div>
+        </div>
+      </div>
+
       <div id="subsyncModal" class="modal hidden" aria-hidden="true">
         <div class="modal-content subsync-modal-content">
           <div class="modal-header">

src/renderer/modals/session-help-sections.ts

@@ -225,6 +225,8 @@ function describeSessionAction(
       return 'Open jimaku';
     case 'openTsukihime':
       return 'Open TsukiHime';
+    case 'openSubtitleSelection':
+      return 'Select subtitle tracks';
     case 'openSubtitleGeneration':
       return 'Generate Japanese subtitles';
     case 'openYoutubePicker':
@@ -268,6 +270,7 @@ function sectionForSessionBinding(binding: CompiledSessionBinding): string {
     case 'openJimaku':
     case 'openTsukihime':
     case 'openCharacterDictionaryManager':
+    case 'openSubtitleSelection':
     case 'openSubtitleGeneration':
     case 'openControllerSelect':
     case 'openControllerDebug':

src/renderer/modals/subtitle-selection.ts

@@ -0,0 +1,172 @@
+import type { SubtitleSelectionState } from '../../shared/subtitle-selection';
+import type { RendererContext } from '../context';
+import { syncOverlayMouseIgnoreState } from '../overlay-mouse-ignore';
+import { createModalFocusGuard } from './modal-focus-guard';
+
+function element<T extends HTMLElement>(id: string, constructor: new () => T): T {
+  const node = document.getElementById(id);
+  if (!(node instanceof constructor)) throw new Error(`Missing subtitle selection element: ${id}`);
+  return node;
+}
+
+export function createSubtitleSelectionModal(
+  ctx: RendererContext,
+  options: { syncSettingsModalSubtitleSuppression: () => void },
+) {
+  const dom = {
+    modal: element('subtitleSelectionModal', HTMLDivElement),
+    primary: element('subtitleSelectionPrimary', HTMLSelectElement),
+    secondary: element('subtitleSelectionSecondary', HTMLSelectElement),
+    status: element('subtitleSelectionStatus', HTMLDivElement),
+    apply: element('subtitleSelectionApply', HTMLButtonElement),
+    close: element('subtitleSelectionClose', HTMLButtonElement),
+  };
+  let snapshot: SubtitleSelectionState | null = null;
+  let generation = 0;
+  let pending = false;
+  let priorFocus: Element | null = null;
+  const focus = createModalFocusGuard({
+    isOpen: () => ctx.state.subtitleSelectionModalOpen,
+    getModalRoot: () => dom.modal,
+    getPreferredFocusTargets: () => [dom.primary, dom.secondary, dom.apply],
+    getFallbackFocusTarget: () => dom.close,
+    isModalLayer: ctx.platform.isModalLayer,
+  });
+
+  function status(message: string, error = false): void {
+    dom.status.textContent = message;
+    dom.status.classList.toggle('error', error);
+  }
+
+  function updateControls(): void {
+    const disabled = pending || !snapshot;
+    dom.primary.disabled = disabled;
+    dom.secondary.disabled = disabled;
+    const duplicate = dom.primary.value !== 'no' && dom.primary.value === dom.secondary.value;
+    dom.apply.disabled = disabled || duplicate;
+    for (const option of dom.secondary.options)
+      option.disabled = option.value !== 'no' && option.value === dom.primary.value;
+  }
+
+  function populate(select: HTMLSelectElement, selected: number | null): void {
+    select.replaceChildren();
+    for (const track of [{ id: null, label: 'None' }, ...(snapshot?.tracks ?? [])]) {
+      const option = document.createElement('option');
+      option.value = track.id === null ? 'no' : String(track.id);
+      option.textContent = track.label;
+      select.append(option);
+    }
+    select.value = selected === null ? 'no' : String(selected);
+  }
+
+  async function refresh(openGeneration: number): Promise<void> {
+    try {
+      const next = await window.electronAPI.getSubtitleSelection();
+      if (generation !== openGeneration || !ctx.state.subtitleSelectionModalOpen) return;
+      snapshot = next;
+      populate(dom.primary, next.primary);
+      populate(dom.secondary, next.secondary);
+      status(
+        next.tracks.length
+          ? 'Choose subtitle tracks, then apply.'
+          : 'No subtitle tracks loaded in this video.',
+      );
+    } catch (cause) {
+      if (generation !== openGeneration || !ctx.state.subtitleSelectionModalOpen) return;
+      status(cause instanceof Error ? cause.message : 'Could not read subtitle tracks.', true);
+    } finally {
+      if (generation === openGeneration && ctx.state.subtitleSelectionModalOpen) {
+        pending = false;
+        updateControls();
+        focus.focusFallbackTarget();
+      }
+    }
+  }
+
+  function open(): void {
+    if (ctx.state.subtitleSelectionModalOpen) return;
+    priorFocus = document.activeElement;
+    snapshot = null;
+    pending = true;
+    generation += 1;
+    populate(dom.primary, null);
+    populate(dom.secondary, null);
+    status('Loading subtitle tracks...');
+    updateControls();
+    ctx.state.subtitleSelectionModalOpen = true;
+    options.syncSettingsModalSubtitleSuppression();
+    dom.modal.classList.remove('hidden');
+    dom.modal.setAttribute('aria-hidden', 'false');
+    syncOverlayMouseIgnoreState(ctx);
+    focus.attach();
+    focus.focusFallbackTarget();
+    window.electronAPI.notifyOverlayModalOpened('subtitle-selection');
+    void refresh(generation);
+  }
+
+  function close(): void {
+    if (!ctx.state.subtitleSelectionModalOpen) return;
+    generation += 1;
+    ctx.state.subtitleSelectionModalOpen = false;
+    options.syncSettingsModalSubtitleSuppression();
+    dom.modal.classList.add('hidden');
+    dom.modal.setAttribute('aria-hidden', 'true');
+    focus.detach();
+    window.electronAPI.notifyOverlayModalClosed('subtitle-selection');
+    syncOverlayMouseIgnoreState(ctx);
+    if (priorFocus instanceof HTMLElement) priorFocus.focus({ preventScroll: true });
+    priorFocus = null;
+  }
+
+  async function apply(): Promise<void> {
+    if (dom.apply.disabled || pending || !snapshot) return;
+    const openGeneration = generation;
+    pending = true;
+    updateControls();
+    status('Applying subtitle tracks...');
+    try {
+      await window.electronAPI.applySubtitleSelection({
+        mediaPath: snapshot.mediaPath,
+        primary: dom.primary.value === 'no' ? null : Number(dom.primary.value),
+        secondary: dom.secondary.value === 'no' ? null : Number(dom.secondary.value),
+      });
+      if (generation === openGeneration) close();
+    } catch (cause) {
+      if (generation === openGeneration)
+        status(cause instanceof Error ? cause.message : 'Could not select subtitle tracks.', true);
+    } finally {
+      if (generation === openGeneration) {
+        pending = false;
+        updateControls();
+      }
+    }
+  }
+
+  function handleKeydown(event: KeyboardEvent): boolean {
+    if (event.key === 'Escape') {
+      event.preventDefault();
+      close();
+    } else if (
+      event.key === 'Enter' &&
+      !(event.target instanceof HTMLSelectElement) &&
+      event.target !== dom.close
+    ) {
+      event.preventDefault();
+      void apply();
+    }
+    return true;
+  }
+
+  function wireDomEvents(): void {
+    dom.close.addEventListener('click', close);
+    dom.apply.addEventListener('click', () => void apply());
+    dom.primary.addEventListener('change', () => {
+      if (dom.primary.value !== 'no' && dom.primary.value === dom.secondary.value)
+        dom.secondary.value = 'no';
+      updateControls();
+    });
+    dom.secondary.addEventListener('change', updateControls);
+  }
+
+  return { open, close, handleKeydown, wireDomEvents, dispose: () => focus.detach() };
+}

src/renderer/overlay-mouse-ignore.ts

@@ -10,6 +10,7 @@ function isBlockingOverlayModalOpen(state: RendererState): boolean {
     state.youtubePickerModalOpen ||
     state.kikuModalOpen ||
     state.runtimeOptionsModalOpen ||
+    state.subtitleSelectionModalOpen ||
     state.subsyncModalOpen ||
     state.subtitleGenerationModalOpen ||
     state.sessionHelpModalOpen,

src/renderer/renderer.ts

@@ -44,6 +44,7 @@ import { wireSubtitleSidebarSelection } from './modals/subtitle-sidebar-selectio
 import { isControllerInteractionBlocked } from './controller-interaction-blocking.js';
 import { createCharacterDictionaryModal } from './modals/character-dictionary.js';
 import { createRuntimeOptionsModal } from './modals/runtime-options.js';
+import { createSubtitleSelectionModal } from './modals/subtitle-selection';
 import { createSubsyncModal } from './modals/subsync.js';
 import { createSubtitleGenerationModal } from './modals/subtitle-generation.js';
 import { createYoutubeTrackPickerModal } from './modals/youtube-track-picker.js';
@@ -153,6 +154,12 @@ const modalDescriptors = [
     close: () => characterDictionaryModal.closeCharacterDictionaryModal(),
     suppressesSubtitles: true,
   },
+  {
+    id: 'subtitle-selection',
+    isOpen: () => ctx.state.subtitleSelectionModalOpen,
+    close: () => subtitleSelectionModal.close(),
+    suppressesSubtitles: true,
+  },
   {
     id: 'subsync',
     isOpen: () => ctx.state.subsyncModalOpen,
@@ -216,6 +223,9 @@ const characterDictionaryModal = createCharacterDictionaryModal(ctx, {
   modalStateReader: { isAnyModalOpen },
   syncSettingsModalSubtitleSuppression,
 });
+const subtitleSelectionModal = createSubtitleSelectionModal(ctx, {
+  syncSettingsModalSubtitleSuppression,
+});
 const subsyncModal = createSubsyncModal(ctx, {
   modalStateReader: { isAnyModalOpen },
   syncSettingsModalSubtitleSuppression,
@@ -293,6 +303,7 @@ const mediaTimingReviewModal = createMediaTimingReviewModal(ctx, {
 const keyboardHandlers = createKeyboardHandlers(ctx, {
   handleRuntimeOptionsKeydown: runtimeOptionsModal.handleRuntimeOptionsKeydown,
   handleCharacterDictionaryKeydown: characterDictionaryModal.handleCharacterDictionaryKeydown,
+  handleSubtitleSelectionKeydown: subtitleSelectionModal.handleKeydown,
   handleSubsyncKeydown: subsyncModal.handleSubsyncKeydown,
   handleSubtitleGenerationKeydown: subtitleGenerationModal.handleKeydown,
   handleKikuKeydown: kikuModal.handleKikuKeydown,
@@ -624,6 +635,9 @@ function registerModalOpenHandlers(): void {
       youtubePickerModal.closeYoutubePickerModal();
     });
   });
+  window.electronAPI.onSubtitleSelectionOpen(() => {
+    runGuarded('subtitle-selection:open', () => subtitleSelectionModal.open());
+  });
   window.electronAPI.onSubsyncManualOpen((payload: SubsyncManualPayload) => {
     runGuarded('subsync:manual-open', () => {
       subsyncModal.openSubsyncModal(payload);
@@ -849,6 +863,7 @@ async function init(): Promise<void> {
   playlistBrowserModal.wireDomEvents();
   kikuModal.wireDomEvents();
   runtimeOptionsModal.wireDomEvents();
+  subtitleSelectionModal.wireDomEvents();
   subsyncModal.wireDomEvents();
   subtitleGenerationModal.wireDomEvents();
   controllerSelectModal.wireDomEvents();
@@ -858,6 +873,7 @@ async function init(): Promise<void> {
   subtitleSidebarModal.wireDomEvents();
   characterDictionaryModal.wireDomEvents();
   window.addEventListener('beforeunload', () => {
+    subtitleSelectionModal.dispose();
     subtitleGenerationModal.dispose();
     subtitleSidebarModal.disposeDomEvents();
   });
@@ -867,9 +883,13 @@ async function init(): Promise<void> {
       runtimeOptionsModal.updateRuntimeOptions(options);
     });
   });
+  window.electronAPI.onSessionBindingsChanged(keyboardHandlers.updateSessionBindings);
   window.electronAPI.onConfigHotReload((payload: ConfigHotReloadPayload) => {
     runGuarded('config:hot-reload', () => {
-      keyboardHandlers.updateSessionBindings(payload.sessionBindings);
+      void window.electronAPI
+        .getSessionBindings()
+        .then(keyboardHandlers.updateSessionBindings)
+        .catch((error: unknown) => console.error('Could not refresh session bindings', error));
       void keyboardHandlers.refreshConfiguredShortcuts();
       subtitleRenderer.applySubtitleStyle(payload.subtitleStyle);
       subtitleRenderer.updatePrimarySubMode(payload.primarySubMode);

src/renderer/state.ts

@@ -89,6 +89,7 @@ export type RendererState = {
   characterDictionaryStatus: string;
 
   subsyncModalOpen: boolean;
+  subtitleSelectionModalOpen: boolean;
   subtitleGenerationModalOpen: boolean;
   subsyncSubtitleTracks: SubsyncSubtitleTrack[];
   subsyncSubmitting: boolean;
@@ -223,6 +224,7 @@ export function createRendererState(): RendererState {
     characterDictionaryStatus: '',
 
     subsyncModalOpen: false,
+    subtitleSelectionModalOpen: false,
     subtitleGenerationModalOpen: false,
     subsyncSubtitleTracks: [],
     subsyncSubmitting: false,

src/renderer/style.css

@@ -3228,6 +3228,16 @@ iframe[id^='yomitan-popup'],
   padding: 8px 10px;
 }
 
+.subsync-field select:focus-visible {
+  outline: 2px solid var(--ctp-blue);
+  outline-offset: 2px;
+}
+
+#subtitleSelectionModal .kiku-confirm-button:disabled {
+  opacity: 0.5;
+  cursor: default;
+}
+
 .subsync-footer {
   display: flex;
   justify-content: flex-end;

src/shared/ipc/contracts.ts

@@ -4,6 +4,7 @@ import type { RuntimeOptionId, RuntimeOptionValue } from '../../types/runtime-op
 export const OVERLAY_HOSTED_MODALS = [
   'runtime-options',
   'subsync',
+  'subtitle-selection',
   'subtitle-generation',
   'jimaku',
   'tsukihime',
@@ -51,6 +52,8 @@ export const IPC_CHANNELS = {
     dispatchSessionAction: 'session-action:dispatch',
   },
   request: {
+    getSubtitleSelection: 'subtitle-selection:get',
+    applySubtitleSelection: 'subtitle-selection:apply',
     requestSubtitleGenerationOpen: 'subtitle-generation:open',
     getSubtitleGenerationStatus: 'subtitle-generation:status',
     startSubtitleGeneration: 'subtitle-generation:start',
@@ -143,6 +146,7 @@ export const IPC_CHANNELS = {
     mediaTimingReviewResolve: 'media-timing-review:resolve',
   },
   event: {
+    subtitleSelectionOpen: 'subtitle-selection:opened',
     subtitleGenerationOpen: 'subtitle-generation:opened',
     subtitleGenerationProgress: 'subtitle-generation:progress',
     subtitleSet: 'subtitle:set',
@@ -174,6 +178,7 @@ export const IPC_CHANNELS = {
     controllerDebugOpen: 'controller-debug:open',
     subtitleSidebarToggle: 'subtitle-sidebar:toggle',
     primarySubtitleBarToggle: 'primary-subtitle-bar:toggle',
+    sessionBindingsChanged: 'session-bindings:changed',
     configHotReload: 'config:hot-reload',
     overlayNotification: 'overlay:notification',
     notificationHistoryToggle: 'notification-history:toggle',

src/shared/ipc/validators.ts

@@ -44,6 +44,7 @@ const SESSION_ACTION_IDS: SessionActionId[] = [
   'openControllerDebug',
   'openJimaku',
   'openTsukihime',
+  'openSubtitleSelection',
   'openSubtitleGeneration',
   'openYoutubePicker',
   'openPlaylistBrowser',

src/shared/mpv-input-bindings.test.ts

@@ -103,3 +103,13 @@ test('SubMiner ownership recognizes leading mpv prefixes without matching comman
     ['d', 'e', 'f', 'g'],
   );
 });
+
+test('sequence conflict discovery allows winning ignore bindings used by mpv sequence prefixes', () => {
+  const bindings = [
+    { key: 'g', cmd: 'show-text old', priority: 0 },
+    { key: 'g', cmd: 'no-osd ignore', priority: 1 },
+    { key: 'h', cmd: 'show-text action', priority: 0 },
+  ];
+  assert.deepEqual(parseMpvInputBindingKeys(bindings), ['g', 'h']);
+  assert.deepEqual(parseMpvInputBindingKeys(bindings, { includeIgnored: false }), ['h']);
+});

src/shared/mpv-input-bindings.ts

@@ -59,9 +59,12 @@ export function keyboardEventToMpvKey(
   return normalizeMpvInputKey([...modifiers, key].join('+'));
 }
 
-export function parseMpvInputBindingKeys(value: unknown): string[] {
+export function parseMpvInputBindingKeys(
+  value: unknown,
+  { includeIgnored = true }: { includeIgnored?: boolean } = {},
+): string[] {
   if (!Array.isArray(value)) return [];
-  const bindings = new Map<string, { priority: number; owned: boolean }>();
+  const bindings = new Map<string, { priority: number; owned: boolean; ignored: boolean }>();
   for (const candidate of value) {
     const entry: unknown = candidate;
     if (
@@ -94,8 +97,14 @@ export function parseMpvInputBindingKeys(value: unknown): string[] {
       entry.priority > previous.priority ||
       (entry.priority === previous.priority && owned)
     ) {
-      bindings.set(key, { priority: entry.priority, owned });
+      bindings.set(key, {
+        priority: entry.priority,
+        owned,
+        ignored: entry.cmd.trim().replace(MPV_COMMAND_PREFIXES, '') === 'ignore',
+      });
     }
   }
-  return [...bindings].filter(([, binding]) => !binding.owned).map(([key]) => key);
+  return [...bindings]
+    .filter(([, binding]) => !binding.owned && (includeIgnored || !binding.ignored))
+    .map(([key]) => key);
 }

src/shared/session-key-sequences.ts

@@ -0,0 +1,71 @@
+import type {
+  CompiledSessionBinding,
+  SessionBindingWarning,
+  SessionKeySpec,
+} from '../types/session-bindings';
+
+export interface SessionKeyReservation {
+  key: SessionKeySpec;
+  path: string;
+}
+
+export function getSessionSequencePrefix(key: SessionKeySpec): SessionKeySpec | null {
+  const match = /^(Key[A-Z])-Key[A-Z]$/.exec(key.code);
+  return match?.[1] ? { code: match[1], modifiers: key.modifiers } : null;
+}
+
+function signature(key: SessionKeySpec): string {
+  return [...key.modifiers, key.code].join('+');
+}
+
+export function resolveSessionSequenceConflicts(
+  bindings: CompiledSessionBinding[],
+  reservations: SessionKeyReservation[] = [],
+): { bindings: CompiledSessionBinding[]; warnings: SessionBindingWarning[] } {
+  const singles = new Map<string, string[]>();
+  for (const { key, path } of [
+    ...bindings.map((binding) => ({ key: binding.key, path: binding.sourcePath })),
+    ...reservations,
+  ]) {
+    if (getSessionSequencePrefix(key)) continue;
+    const id = signature(key);
+    singles.set(id, [...(singles.get(id) ?? []), path]);
+  }
+  const warnings: SessionBindingWarning[] = [];
+  const effective = bindings.filter((binding) => {
+    const prefix = getSessionSequencePrefix(binding.key);
+    if (!prefix) return true;
+    const conflicts = singles.get(signature(prefix));
+    if (!conflicts?.length) return true;
+    const paths = [...new Set(conflicts)];
+    warnings.push({
+      kind: 'conflict',
+      path: binding.sourcePath,
+      value: binding.originalKey,
+      conflictingPaths: paths,
+      message: `Disabled sequence "${binding.originalKey}" (${binding.sourcePath}): its first key is reserved by ${paths.join(', ')}. Single-key bindings take priority; remap the sequence or its conflicting binding.`,
+    });
+    return false;
+  });
+  return { bindings: effective, warnings };
+}
+
+// Imported mpv keys preserve case: g and G are different strokes.
+export function reserveMpvSequencePrefixes(keys: string[]): SessionKeyReservation[] {
+  return keys.flatMap((value) => {
+    const parts = value.split('+');
+    const letter = parts.pop();
+    if (!letter || !/^[a-z]$/i.test(letter)) return [];
+    const modifiers: SessionKeySpec['modifiers'] = [];
+    if (parts.includes('ctrl')) modifiers.push('ctrl');
+    if (parts.includes('alt')) modifiers.push('alt');
+    if (parts.includes('shift') || /^[A-Z]$/.test(letter)) modifiers.push('shift');
+    if (parts.includes('meta')) modifiers.push('meta');
+    return [
+      {
+        key: { code: `Key${letter.toUpperCase()}`, modifiers },
+        path: `mpv input binding "${value}"`,
+      },
+    ];
+  });
+}

src/shared/subtitle-selection.ts

@@ -0,0 +1,33 @@
+export interface SubtitleSelectionState {
+  mediaPath: string;
+  tracks: { id: number; label: string }[];
+  primary: number | null;
+  secondary: number | null;
+}
+
+export type SubtitleSelectionRequest = Pick<
+  SubtitleSelectionState,
+  'mediaPath' | 'primary' | 'secondary'
+>;
+
+export function parseSubtitleSelectionRequest(value: unknown): SubtitleSelectionRequest {
+  if (
+    typeof value !== 'object' ||
+    value === null ||
+    !('mediaPath' in value) ||
+    typeof value.mediaPath !== 'string' ||
+    !value.mediaPath ||
+    !('primary' in value) ||
+    !isTrackSelection(value.primary) ||
+    !('secondary' in value) ||
+    !isTrackSelection(value.secondary)
+  )
+    throw new Error('Invalid subtitle selection.');
+  if (value.primary !== null && value.primary === value.secondary)
+    throw new Error('Choose different primary and secondary tracks.');
+  return { mediaPath: value.mediaPath, primary: value.primary, secondary: value.secondary };
+}
+
+function isTrackSelection(value: unknown): value is number | null {
+  return value === null || (typeof value === 'number' && Number.isSafeInteger(value) && value > 0);
+}

src/types/config.ts

@@ -126,6 +126,7 @@ export interface ShortcutsConfig {
   openRuntimeOptions?: string | null;
   openJimaku?: string | null;
   openTsukihime?: string | null;
+  openSubtitleSelection?: string | null;
   openSubtitleGeneration?: string | null;
   openSessionHelp?: string | null;
   openControllerSelect?: string | null;
@@ -152,6 +153,7 @@ export interface Config {
   shortcuts?: RawShortcutsConfig;
   secondarySub?: SecondarySubConfig;
   subsync?: SubsyncConfig;
+  subtitleSelection?: { enabled?: boolean };
   subtitleGeneration?: Partial<SubtitleGenerationConfig>;
   startupWarmups?: StartupWarmupsConfig;
   subtitleStyle?: SubtitleStyleConfig;
@@ -304,6 +306,7 @@ export interface ResolvedConfig {
   shortcuts: Required<ShortcutsConfig>;
   secondarySub: Required<SecondarySubConfig>;
   subsync: Required<SubsyncConfig>;
+  subtitleSelection: { enabled: boolean };
   subtitleGeneration: SubtitleGenerationConfig;
   startupWarmups: {
     lowPowerMode: boolean;

src/types/runtime.ts

@@ -525,6 +525,13 @@ export interface ElectronAPI {
   focusMainWindow: () => Promise<void>;
   activatePlaybackWindowForOverlayInteraction: () => Promise<boolean>;
   getSubtitleStyle: () => Promise<SubtitleRendererStyleConfig | null>;
+  onSubtitleSelectionOpen: (callback: () => void) => void;
+  getSubtitleSelection: () => Promise<
+    import('../shared/subtitle-selection').SubtitleSelectionState
+  >;
+  applySubtitleSelection: (
+    request: import('../shared/subtitle-selection').SubtitleSelectionRequest,
+  ) => Promise<void>;
   onSubsyncManualOpen: (callback: (payload: SubsyncManualPayload) => void) => void;
   runSubsyncManual: (request: SubsyncManualRunRequest) => Promise<SubsyncResult>;
   onKikuFieldGroupingRequest: (callback: (data: KikuFieldGroupingRequestData) => void) => void;
@@ -604,6 +611,7 @@ export interface ElectronAPI {
     modal:
       | 'runtime-options'
       | 'subsync'
+      | 'subtitle-selection'
       | 'subtitle-generation'
       | 'jimaku'
       | 'tsukihime'
@@ -622,6 +630,7 @@ export interface ElectronAPI {
     modal:
       | 'runtime-options'
       | 'subsync'
+      | 'subtitle-selection'
       | 'subtitle-generation'
       | 'jimaku'
       | 'tsukihime'
@@ -637,6 +646,7 @@ export interface ElectronAPI {
       | 'changelog',
   ) => void;
   reportOverlayContentBounds: (measurement: OverlayContentMeasurement) => void;
+  onSessionBindingsChanged: (callback: (bindings: CompiledSessionBinding[]) => void) => void;
   onConfigHotReload: (callback: (payload: ConfigHotReloadPayload) => void) => void;
 }
 

src/types/session-bindings.ts

@@ -23,6 +23,7 @@ export type SessionActionId =
   | 'openControllerDebug'
   | 'openJimaku'
   | 'openTsukihime'
+  | 'openSubtitleSelection'
   | 'openSubtitleGeneration'
   | 'openYoutubePicker'
   | 'openPlaylistBrowser'