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/terminal/runtime.js

@@ -1,18 +1,20 @@
 import { WebSocketServer } from 'ws';
 import {
-  TERMINAL_INPUT_WS_MAX_PAYLOAD_BYTES,
-  TERMINAL_INPUT_WS_PATH,
+  TERMINAL_WS_MAX_PAYLOAD_BYTES as TERMINAL_INPUT_WS_MAX_PAYLOAD_BYTES,
+  TERMINAL_WS_PATH as TERMINAL_INPUT_WS_PATH,
+  createTerminalWsControlFrame as createTerminalInputWsControlFrame,
+  isRebindRateLimited,
+  normalizeTerminalWsMessageToText as normalizeTerminalInputWsMessageToText,
+  parseRequestPathname,
+  pruneRebindTimestamps,
+  readTerminalWsControlFrame as readTerminalInputWsControlFrame,
+} from './terminal-ws-protocol.js';
+import {
   TERMINAL_OUTPUT_REPLAY_MAX_BYTES,
   appendTerminalOutputReplayChunk,
   createTerminalOutputReplayBuffer,
-  createTerminalInputWsControlFrame,
-  isRebindRateLimited,
   listTerminalOutputReplayChunksSince,
-  normalizeTerminalInputWsMessageToText,
-  parseRequestPathname,
-  pruneRebindTimestamps,
-  readTerminalInputWsControlFrame,
-} from './index.js';
+} from './output-replay-buffer.js';
 
 export function createTerminalRuntime({
   app,