chore: remove dead code (59 unused files + ~125 unused exports) (#1835)

* chore: remove dead/unreferenced files across ui, vscode

Remove 59 unused source files (components, hooks, lib utils, stores,
barrels, and orphaned vscode github modules) that are not imported by
any entry-reachable code. Also drop a stale test mock for the removed
execCommands module.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

* refactor: remove unused exported symbols (types, functions, consts, hooks)

Remove exported symbols whose identifier is referenced nowhere in the
repository (verified via repo-wide search), across ui types/contracts,
lib utilities, sync layer, stores, and components. Also drop the few
imports/private helpers orphaned by these removals.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

* refactor: remove more unused exports (desktop, shortcuts, worktree, vscode)

Continue removing repo-wide unreferenced exported functions, consts and
types across lib/desktop, shortcuts, worktreeSessionCreator, sync, and
vscode gitService, with cascading orphaned helpers/imports cleaned up.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

* chore: add dead-code cleanup tooling

* refactor: checkpoint dead-code cleanup

* refactor: remove dead-code suppressions

---------

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/voice/index.ts

@@ -1,36 +1,17 @@
 /**
  * Voice module barrel export
- * Provides clean import path for voice configuration and client tools
+ * Provides a clean import path for voice session hooks.
  *
  * @example
  * ```typescript
- * import { VOICE_CONFIG, realtimeClientTools, voiceHooks } from '@/lib/voice';
+ * import { voiceHooks } from '@/lib/voice';
  * ```
  */
 
-// Configuration
-export { VOICE_CONFIG } from "./voiceConfig";
-
-// Client tools for ElevenLabs voice agent
-export { realtimeClientTools } from "./realtimeClientTools";
-export type { RealtimeClientTools } from "./realtimeClientTools";
-
 // Voice session registry (from voiceSession.ts)
 export {
-    registerVoiceSession,
-    unregisterVoiceSession,
-    getVoiceSession,
     isVoiceSessionStarted,
 } from "./voiceSession";
 
 // Voice hooks for session-to-voice event routing (from voiceHooks.ts)
 export { voiceHooks } from "./voiceHooks";
-
-// Context formatters for voice-native output
-export {
-    formatMessage,
-    formatNewMessages,
-    formatPermissionRequest,
-    formatReadyEvent,
-    type VoiceMessage,
-} from "./contextFormatters";