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/stores/usePluginsStore.ts

@@ -11,7 +11,7 @@ import { opencodeClient } from '@/lib/opencode/client';
 import { runtimeFetch } from '@/lib/runtime-fetch';
 
 export type PluginScope = 'user' | 'project';
-export type PluginParsedKind = 'npm' | 'path';
+type PluginParsedKind = 'npm' | 'path';
 
 export interface PluginEntry {
   id: string;
@@ -123,7 +123,7 @@ const getConfigDirectory = (): string | null => {
 };
 
 const CLIENT_RELOAD_DELAY_MS = 800;
-export const PLUGINS_LOAD_CACHE_TTL_MS = 5000;
+const PLUGINS_LOAD_CACHE_TTL_MS = 5000;
 const DEFAULT_PLUGINS_CACHE_KEY = '__default__';
 const pluginsLastLoadedAt = new Map<string, number>();
 const pluginsLoadInFlight = new Map<string, Promise<boolean>>();