feat: expand keybinding system with vim motions, media keys, and inspector improvements (#3161)

Addresses the keybinding audit (#3157):

- Add missing vim-normal bindings: 0, $, w, b, e, x, dd, D, C
- Add new CursorWordEnd action for vim 'e' motion
- Add VimChangeToEnd action for vim 'C' motion
- Add Media key support (play, pause, stop, volume, etc.)
- Refactor inspector keymap to be minimal but respect enter_accept
  and provide vim-style j/k navigation for vim users
- Add $ to special character parsing
- Replace eprintln! with tracing::warn! for config errors
- Document shifted punctuation keys and media keys

To be rebased once #3158 is merged

2 files changed, 52 insertions, 9 deletions

diff --git a/docs/docs/configuration/advanced-key-binding.md b/docs/docs/configuration/advanced-key-binding.md
index 9183ca8b..5027c5a2 100644
--- a/docs/docs/configuration/advanced-key-binding.md
+++ b/docs/docs/configuration/advanced-key-binding.md
@@ -69,7 +69,34 @@ An uppercase letter represents itself without needing a `shift` modifier. For ex
 Some special characters are written out directly:
 
 ```
-"?", "/", "[", "]"
+"?", "/", "[", "]", "$"
+```
+
+### Shifted and punctuation keys
+
+When you press a key like `Shift+1`, your terminal sends the resulting character (`!`) rather than "shift-1". To bind shifted punctuation keys, use the character directly:
+
+```toml
+[keymap.emacs]
+"!" = "some-action"    # Binds to Shift+1
+"@" = "some-action"    # Binds to Shift+2
+"#" = "some-action"    # Binds to Shift+3
+"$" = "cursor-end"     # Binds to Shift+4 (vim $ motion)
+```
+
+Any single character can be used as a key binding.
+
+!!! note
+    The `shift` modifier is still valid for non-character keys like `"shift-tab"` or `"shift-up"`.
+
+### Media keys
+
+Media keys are supported on terminals that implement the kitty keyboard protocol with `DISAMBIGUATE_ESCAPE_CODES` enabled:
+
+```
+"play", "pause", "playpause", "stop"
+"fastforward", "rewind", "tracknext", "trackprevious"
+"record", "lowervolume", "raisevolume", "mutevolume", "mute"
 ```
 
 ### Multi-key sequences
@@ -127,6 +154,7 @@ Actions are specified as kebab-case strings.
 | `cursor-right` | Move cursor one character right |
 | `cursor-word-left` | Move cursor one word left |
 | `cursor-word-right` | Move cursor one word right |
+| `cursor-word-end` | Move cursor to end of current/next word (vim `e` motion) |
 | `cursor-start` | Move cursor to start of line |
 | `cursor-end` | Move cursor to end of line |
 
@@ -191,6 +219,7 @@ The difference between `accept` and `return-selection`: `accept` runs the comman
 | `vim-enter-insert-at-start` | Move to start of line and enter vim insert mode (like vim `I`) |
 | `vim-enter-insert-at-end` | Move to end of line and enter vim insert mode (like vim `A`) |
 | `vim-search-insert` | Clear the search input and enter vim insert mode (like vim `?` or `/`) |
+| `vim-change-to-end` | Delete to end of line and enter vim insert mode (like vim `C`) |
 | `enter-prefix-mode` | Enter prefix mode (waits for one more key, e.g. `d` for delete) |
 
 ### Inspector
diff --git a/docs/docs/configuration/key-binding.md b/docs/docs/configuration/key-binding.md
index b3ae7aa2..f292999f 100644
--- a/docs/docs/configuration/key-binding.md
+++ b/docs/docs/configuration/key-binding.md
@@ -238,6 +238,15 @@ If [vim is enabled in the config](config.md#keymap_mode), the following keybindi
 | j        | Normal | Selects the previous item on the list      |
 | h        | Normal | Move cursor left                           |
 | l        | Normal | Move cursor right                          |
+| 0        | Normal | Move cursor to start of line               |
+| $        | Normal | Move cursor to end of line                 |
+| w        | Normal | Move cursor to next word                   |
+| b        | Normal | Move cursor to previous word               |
+| e        | Normal | Move cursor to end of current/next word    |
+| x        | Normal | Delete character under cursor              |
+| dd       | Normal | Clear the entire line                      |
+| D        | Normal | Delete to end of line                      |
+| C        | Normal | Delete to end of line and enter insert     |
 | i        | Normal | Enters insert mode                         |
 | I        | Normal | Move to start of line and enter insert     |
 | a        | Normal | Move right and enter insert mode           |
@@ -253,17 +262,22 @@ If [vim is enabled in the config](config.md#keymap_mode), the following keybindi
 | L        | Normal | Jump to bottom of visible screen           |
 | ? or /   | Normal | Clear input and enter insert mode          |
 | 1-9      | Normal | Select item by number                      |
+| enter    | Normal | Execute selected item (respects enter_accept) |
 | Esc      | Insert | Enters normal mode                         |
 
 
 ### Inspector
 Open the inspector with ctrl + o
 
-| Shortcut | Action                                        |
-| -------- | --------------------------------------------- |
-| Esc      | Close the inspector, returning to the shell   |
-| ctrl + o | Close the inspector, returning to search view |
-| ctrl + d | Delete the inspected item from the history    |
-| ↑        | Inspect the previous item in the history      |
-| ↓        | Inspect the next item in the history          |
-| tab      | Select current item and edit                  |
+| Shortcut  | Action                                        |
+| --------- | --------------------------------------------- |
+| Esc       | Close the inspector, returning to the shell   |
+| ctrl + o  | Close the inspector, returning to search view |
+| ctrl + d  | Delete the inspected item from the history    |
+| ↑         | Inspect the previous item in the history      |
+| ↓         | Inspect the next item in the history          |
+| page up   | Inspect the previous item in the history      |
+| page down | Inspect the next item in the history          |
+| j / k     | Navigate items (when vim mode is enabled)     |
+| enter     | Execute selected item (respects enter_accept) |
+| tab       | Select current item and edit                  |