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/event-stream/global-hub.js

@@ -2,7 +2,7 @@ import { createUpstreamSseReader } from './upstream-reader.js';
 
 // Raised from 512 → 2048 to improve recovery after brief disconnects during
 // long-running agent sessions where many events accumulate quickly.
-export const MESSAGE_STREAM_GLOBAL_REPLAY_LIMIT = 2048;
+const MESSAGE_STREAM_GLOBAL_REPLAY_LIMIT = 2048;
 
 export function createGlobalMessageStreamHub({
   buildOpenCodeUrl,

packages/web/server/lib/event-stream/index.js

@@ -1,25 +1,13 @@
-export {
-  MESSAGE_STREAM_GLOBAL_WS_PATH,
-  MESSAGE_STREAM_DIRECTORY_WS_PATH,
-  MESSAGE_STREAM_WS_HEARTBEAT_INTERVAL_MS,
-  parseSseEventEnvelope,
-  sendMessageStreamWsFrame,
-  sendMessageStreamWsEvent,
-} from './protocol.js';
-
 export {
   createGlobalUiEventBroadcaster,
   createMessageStreamWsRuntime,
 } from './runtime.js';
 
 export {
-  MESSAGE_STREAM_GLOBAL_REPLAY_LIMIT,
   createGlobalMessageStreamHub,
 } from './global-hub.js';
 
 export {
-  DEFAULT_UPSTREAM_RECONNECT_DELAY_MS,
   DEFAULT_UPSTREAM_STALL_TIMEOUT_MS,
   UPSTREAM_STALL_TIMEOUT_CONCURRENT_MS,
-  createUpstreamSseReader,
 } from './upstream-reader.js';

packages/web/server/lib/event-stream/runtime.js

@@ -1,6 +1,6 @@
 import { WebSocketServer } from 'ws';
 
-import { parseRequestPathname } from '../terminal/index.js';
+import { parseRequestPathname } from '../terminal/terminal-ws-protocol.js';
 import {
   MESSAGE_STREAM_DIRECTORY_WS_PATH,
   MESSAGE_STREAM_GLOBAL_WS_PATH,