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/vscode/webview/api/bridge.ts

@@ -17,11 +17,6 @@ function getVSCodeAPI(): VSCodeAPI {
   return vscodeApi;
 }
 
-// Export vscode API for direct use
-export const vscode = {
-  postMessage: (message: unknown) => getVSCodeAPI().postMessage(message),
-};
-
 interface BridgeRequest {
   id: string;
   type: string;

packages/vscode/webview/api/streamPerf.ts

@@ -19,7 +19,7 @@ declare global {
   }
 }
 
-export const vscodeStreamPerfEnabled = (): boolean => {
+const vscodeStreamPerfEnabled = (): boolean => {
   try {
     return window.localStorage.getItem(STREAM_PERF_STORAGE_KEY) === '1';
   } catch {