refactor(hachidori): drop the Docker management upload for character dictionaries

Every supported host now takes dictionary ZIPs over the link, so remove
the port 8780 upload, its hachidori.externalHostManagementUrl override and
the hachidori config section. A linked host without linked-import-v1 now
reports the update or manual-import fix.

docs/architecture/README.md

@@ -50,7 +50,7 @@ The dictionary backend is selected once at startup by `dictionaryBackend`. Yomit
 
 `setup-state.json` records one backend's status at a time plus `completedDictionaryBackends`, the backends that finished setup before. The app projects the file onto its active backend on startup and stamps that backend into the file. The launcher gates playback on the stamped backend when an app is already running, since a config edit takes effect only after restart.
 
-`vendor/hachidori/` is a submodule of `ksyasuda/hachidori`, tracking the `subminer` branch and pinned to a tested commit. Its nested HoshiDicts submodule and WASM binaries remain upstream versions. Initialize sources with `git submodule update --init --recursive`; merge upstream updates in the fork, test them, then update SubMiner's submodule commit. `SOURCE.json` records the upstream base and artifact checksums; the submodule commit identifies the integrated version. `build:hachidori` verifies recorded artifact checksums and stages the extension for development and packaging. It enables overlay mode, disables custom JavaScript, keeps the lookup highlight on in the overlay first-install options (SubMiner captures media from mpv, not the overlay viewport), removes the unsupported `userScripts` permission, and sets a fixed manifest `key` so the extension ID (and the storage origin holding its dictionaries and settings) does not depend on the userData path, only in that staged copy; the fork keeps upstream browser defaults. Before loading the extension, its session clears service worker registrations so Electron uses the current bundled code; dictionary databases and settings remain intact. First-run setup uses Hachidori sharing messages to link or unlink external dictionary hosts and checks their live inventory. Dictionary imports go through Hachidori's chunked upload requests (`hachidori-linked-import`): an unlinked install imports the ZIP itself and a linked one forwards it to its host. Hosts that do not advertise `linked-import-v1` (hachidori-docker, Hachidori before 0.2.3) get the ZIP from the main process over the Docker management API instead. Linked dictionaries and dictionary edits use the host, while Anki configuration, pronunciation sources, custom buttons, and mining stay local to SubMiner. The parser bridge adapts its runtime messages to the existing subtitle scanner and dictionary automation. Scanning retains term-entry frequencies, and only tokens without ranks need further frequency lookups through the existing term-entry API. This requires a matching definition entry and does not preserve the frequency source's reading provenance. SubMiner consumes native `hachidori-popup-shown` and `hachidori-popup-hidden` attention events for mouse handling, keyboard focus, and the subtitle sidebar. Attention also covers a left press anywhere on the overlay that may start a selection, and the host element only exists after the first lookup, so once a Hachidori event has been seen, popup auto-pause, popup key routing, controller lookup state, and the gate on imported mpv keys and mouse buttons require an unhidden popup pane in the host's shadow root. Auto-pause rechecks after each successful lookup. Hachidori's popup lives in the overlay document rather than an iframe, so wheel events over its host scroll the popup instead of forwarding to mpv. The fork retains host attributes, hover and successful-lookup notifications, and commands that need private reader state. The Anki proxy strips local duplicate/overwrite metadata before forwarding requests and enriches only confirmed writes.
+`vendor/hachidori/` is a submodule of `ksyasuda/hachidori`, tracking the `subminer` branch and pinned to a tested commit. Its nested HoshiDicts submodule and WASM binaries remain upstream versions. Initialize sources with `git submodule update --init --recursive`; merge upstream updates in the fork, test them, then update SubMiner's submodule commit. `SOURCE.json` records the upstream base and artifact checksums; the submodule commit identifies the integrated version. `build:hachidori` verifies recorded artifact checksums and stages the extension for development and packaging. It enables overlay mode, disables custom JavaScript, keeps the lookup highlight on in the overlay first-install options (SubMiner captures media from mpv, not the overlay viewport), removes the unsupported `userScripts` permission, and sets a fixed manifest `key` so the extension ID (and the storage origin holding its dictionaries and settings) does not depend on the userData path, only in that staged copy; the fork keeps upstream browser defaults. Before loading the extension, its session clears service worker registrations so Electron uses the current bundled code; dictionary databases and settings remain intact. First-run setup uses Hachidori sharing messages to link or unlink external dictionary hosts and checks their live inventory. Dictionary imports go through Hachidori's chunked upload requests (`hachidori-linked-import`): an unlinked install imports the ZIP itself and a linked one forwards it to its host. Linked hosts that do not advertise `linked-import-v1` (Hachidori before 0.2.3) cannot receive uploads, and the import reports where to import the ZIP by hand. Linked dictionaries and dictionary edits use the host, while Anki configuration, pronunciation sources, custom buttons, and mining stay local to SubMiner. The parser bridge adapts its runtime messages to the existing subtitle scanner and dictionary automation. Scanning retains term-entry frequencies, and only tokens without ranks need further frequency lookups through the existing term-entry API. This requires a matching definition entry and does not preserve the frequency source's reading provenance. SubMiner consumes native `hachidori-popup-shown` and `hachidori-popup-hidden` attention events for mouse handling, keyboard focus, and the subtitle sidebar. Attention also covers a left press anywhere on the overlay that may start a selection, and the host element only exists after the first lookup, so once a Hachidori event has been seen, popup auto-pause, popup key routing, controller lookup state, and the gate on imported mpv keys and mouse buttons require an unhidden popup pane in the host's shadow root. Auto-pause rechecks after each successful lookup. Hachidori's popup lives in the overlay document rather than an iframe, so wheel events over its host scroll the popup instead of forwarding to mpv. The fork retains host attributes, hover and successful-lookup notifications, and commands that need private reader state. The Anki proxy strips local duplicate/overwrite metadata before forwarding requests and enriches only confirmed writes.
 
 - Small units, explicit boundaries
 - Composition over monoliths