feat(config): show default keybindings in generated example config

- Expand `keybindings` array in `config.example.jsonc` to list all built-in defaults instead of `[]`
- Inject `DEFAULT_KEYBINDINGS` into template when resolved config has an empty keybindings array
- Add regression tests for template parity, default binding compile/action mapping, overlay keyboard dispatch, and mpv plugin registration/dispatch
- Add fullscreen binding to docs shortcut tables and clarify keybindings can target mpv commands or session actions

docs-site/configuration.md

@@ -461,7 +461,7 @@ See `config.example.jsonc` for detailed configuration options.
 
 ### Keybindings
 
-Add a `keybindings` array to configure keyboard shortcuts that send commands to mpv:
+Add a `keybindings` array to configure keyboard shortcuts that send mpv commands or SubMiner session actions:
 
 See `config.example.jsonc` for detailed configuration options and more examples.
 
@@ -470,6 +470,7 @@ See `config.example.jsonc` for detailed configuration options and more examples.
 | Key                  | Command                       | Description                             |
 | -------------------- | ----------------------------- | --------------------------------------- |
 | `Space`              | `["cycle", "pause"]`          | Toggle pause                            |
+| `KeyF`               | `["cycle", "fullscreen"]`     | Toggle fullscreen                       |
 | `KeyJ`               | `["cycle", "sid"]`            | Cycle primary subtitle track            |
 | `Shift+KeyJ`         | `["cycle", "secondary-sid"]`  | Cycle secondary subtitle track          |
 | `Ctrl+Alt+KeyP`      | `["__playlist-browser-open"]` | Open playlist browser                   |

docs-site/public/config.example.jsonc

@@ -183,11 +183,130 @@
 
   // ==========================================
   // Keybindings (MPV Commands)
-  // Extra keybindings that are merged with built-in defaults.
+  // Default and custom keybindings that are merged with built-in defaults.
   // Set command to null to disable a default keybinding.
   // Hot-reload: keybinding changes apply live and update the session help modal on reopen.
   // ==========================================
-  "keybindings": [], // Extra keybindings that are merged with built-in defaults.
+  "keybindings": [
+    {
+      "key": "Space", // Key setting.
+      "command": [
+        "cycle",
+        "pause"
+      ] // Command setting.
+    },
+    {
+      "key": "KeyF", // Key setting.
+      "command": [
+        "cycle",
+        "fullscreen"
+      ] // Command setting.
+    },
+    {
+      "key": "KeyJ", // Key setting.
+      "command": [
+        "cycle",
+        "sid"
+      ] // Command setting.
+    },
+    {
+      "key": "Shift+KeyJ", // Key setting.
+      "command": [
+        "cycle",
+        "secondary-sid"
+      ] // Command setting.
+    },
+    {
+      "key": "ArrowRight", // Key setting.
+      "command": [
+        "seek",
+        5
+      ] // Command setting.
+    },
+    {
+      "key": "ArrowLeft", // Key setting.
+      "command": [
+        "seek",
+        -5
+      ] // Command setting.
+    },
+    {
+      "key": "ArrowUp", // Key setting.
+      "command": [
+        "seek",
+        60
+      ] // Command setting.
+    },
+    {
+      "key": "ArrowDown", // Key setting.
+      "command": [
+        "seek",
+        -60
+      ] // Command setting.
+    },
+    {
+      "key": "Shift+KeyH", // Key setting.
+      "command": [
+        "sub-seek",
+        -1
+      ] // Command setting.
+    },
+    {
+      "key": "Shift+KeyL", // Key setting.
+      "command": [
+        "sub-seek",
+        1
+      ] // Command setting.
+    },
+    {
+      "key": "Shift+BracketRight", // Key setting.
+      "command": [
+        "__sub-delay-next-line"
+      ] // Command setting.
+    },
+    {
+      "key": "Shift+BracketLeft", // Key setting.
+      "command": [
+        "__sub-delay-prev-line"
+      ] // Command setting.
+    },
+    {
+      "key": "Ctrl+Alt+KeyC", // Key setting.
+      "command": [
+        "__youtube-picker-open"
+      ] // Command setting.
+    },
+    {
+      "key": "Ctrl+Alt+KeyP", // Key setting.
+      "command": [
+        "__playlist-browser-open"
+      ] // Command setting.
+    },
+    {
+      "key": "Ctrl+Shift+KeyH", // Key setting.
+      "command": [
+        "__replay-subtitle"
+      ] // Command setting.
+    },
+    {
+      "key": "Ctrl+Shift+KeyL", // Key setting.
+      "command": [
+        "__play-next-subtitle"
+      ] // Command setting.
+    },
+    {
+      "key": "KeyQ", // Key setting.
+      "command": [
+        "quit"
+      ] // Command setting.
+    },
+    {
+      "key": "Ctrl+KeyW", // Key setting.
+      "command": [
+        "quit"
+      ] // Command setting.
+    }
+  ], // Default and custom keybindings that are merged with built-in defaults.
 
   // ==========================================
   // Secondary Subtitles

docs-site/shortcuts.md

@@ -38,6 +38,7 @@ These control playback and subtitle display. They require overlay window focus.
 | Shortcut             | Action                                              |
 | -------------------- | --------------------------------------------------- |
 | `Space`              | Toggle mpv pause                                    |
+| `F`                  | Toggle fullscreen                                   |
 | `V`                  | Toggle primary subtitle bar visibility              |
 | `J`                  | Cycle primary subtitle track                        |
 | `Shift+J`            | Cycle secondary subtitle track                      |