feat(ui): add session list shortcut

packages/ui/src/lib/shortcuts/DOCUMENTATION.md

@@ -27,7 +27,7 @@ Component interaction keys that are not application commands, such as list navig
 
 Bindings remain persisted as `Record<string, string>`. Each binding has one chord or at most two space-separated chords, such as `mod+s p`. `normalizeCombo`, `parseShortcut`, `formatShortcutForDisplay`, and `getShortcutConflict` provide the shared parsing and validation behavior. A single chord conflicts with a sequence sharing its first chord; sibling sequences are valid.
 
-Contextual internal commands may deliberately share a sequence leader. The single-chord handler gets the first chance to handle the event; returning `false` lets the dispatcher start the sequence. The active file editor therefore owns `mod+s` for saving, while a mounted but unfocused editor yields `mod+s p` and `mod+s g` to the draft target pickers.
+Contextual internal commands may deliberately share a sequence leader. The single-chord handler gets the first chance to handle the event; returning `false` lets the dispatcher start the sequence. The active file editor therefore owns `mod+s` for saving, while a mounted but unfocused editor yields `mod+s p`, `mod+s g`, and `mod+s l` to the draft target pickers and session list.
 
 Runtime-specific commands may also share an exact binding when their handlers are mutually exclusive. `open_diff_panel` handles `mod+2` on desktop, while `switch_tab_2` handles it on mobile; each returns `false` outside its runtime so the dispatcher can try the next registered action.
 

packages/ui/src/lib/shortcuts/config.ts

@@ -55,6 +55,13 @@ const SHORTCUT_GROUPS = {
       settingsLabelKey:
         'settings.openchamber.keyboardShortcuts.action.open_draft_worktree_picker.label',
     },
+    {
+      id: 'open_session_list',
+      defaultBinding: 'mod+s l',
+      customizable: true,
+      settingsLabelKey:
+        'settings.openchamber.keyboardShortcuts.action.open_session_list.label',
+    },
     {
       id: 'new_chat_worktree',
       defaultBinding: 'mod+shift+n',

packages/ui/src/lib/shortcuts/schema.test.ts

@@ -48,9 +48,10 @@ describe('shortcut schema', () => {
     ))).toBe(true);
   });
 
-  test('includes draft prefix bindings and session metadata', () => {
+  test('includes session prefix bindings and metadata', () => {
     expect(getShortcutAction('open_draft_project_picker')?.defaultBinding).toBe('mod+s p');
     expect(getShortcutAction('open_draft_worktree_picker')?.defaultBinding).toBe('mod+s g');
+    expect(getShortcutAction('open_session_list')?.defaultBinding).toBe('mod+s l');
     expect(getShortcutAction('focus_input')?.category).toBe('session');
   });