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/web/server/lib/quota/providers/google/index.js

@@ -1,30 +1,3 @@
-/**
- * Google Provider
- *
- * Google quota provider implementation.
- * @module quota/providers/google
- */
-
-export {
-  resolveGoogleOAuthClient,
-  resolveGeminiCliAuth,
-  resolveAntigravityAuth,
-  resolveGoogleAuthSources,
-  DEFAULT_PROJECT_ID
-} from './auth.js';
-
-export {
-  resolveGoogleWindow,
-  transformQuotaBucket,
-  transformModelData
-} from './transforms.js';
-
-export {
-  refreshGoogleAccessToken,
-  fetchGoogleQuotaBuckets,
-  fetchGoogleModels
-} from './api.js';
-
 import { buildResult } from '../../utils/index.js';
 import {
   resolveGoogleAuthSources,