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/opencode/npm-registry.js

@@ -2,9 +2,9 @@ import fs from 'fs';
 import path from 'path';
 import { fileURLToPath } from 'url';
 
-export const NPM_CACHE_TTL_MS = 3_600_000;
-export const NPM_FETCH_TIMEOUT_MS = 5_000;
-export const NPM_REGISTRY_BASE = 'https://registry.npmjs.org';
+const NPM_CACHE_TTL_MS = 3_600_000;
+const NPM_FETCH_TIMEOUT_MS = 5_000;
+const NPM_REGISTRY_BASE = 'https://registry.npmjs.org';
 
 /**
  * @typedef {Object} NpmPackagePayload