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/package-manager.js

@@ -483,7 +483,7 @@ export function detectPackageManagerDetails() {
   };
 }
 
-export function detectPackageManager() {
+function detectPackageManager() {
   return detectPackageManagerDetails().packageManager;
 }
 
@@ -621,7 +621,7 @@ export function getUpdateCommand(pm = detectPackageManager()) {
 /**
  * Get current installed version from package.json
  */
-export function getCurrentVersion() {
+function getCurrentVersion() {
   try {
     const pkgPath = path.resolve(__dirname, '..', '..', 'package.json');
     const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf8'));
@@ -634,7 +634,7 @@ export function getCurrentVersion() {
 /**
  * Fetch latest version from npm registry
  */
-export async function getLatestVersion() {
+async function getLatestVersion() {
   try {
     const response = await fetch(NPM_REGISTRY_URL, {
       headers: { Accept: 'application/json' },
@@ -690,7 +690,7 @@ function compareVersions(left, right) {
 /**
  * Fetch changelog notes between versions
  */
-export async function fetchChangelogNotes(fromVersion, toVersion) {
+async function fetchChangelogNotes(fromVersion, toVersion) {
   try {
     const response = await fetch(CHANGELOG_URL, {
       signal: AbortSignal.timeout(10000),
@@ -769,7 +769,7 @@ export async function checkForUpdates(options = {}) {
 /**
  * Execute the update (used by CLI)
  */
-export function executeUpdate(pm = detectPackageManager(), options = {}) {
+function executeUpdate(pm = detectPackageManager(), options = {}) {
   const command = getUpdateCommand(pm);
   if (!options?.silent) {
     console.log(`Updating ${PACKAGE_NAME} using ${pm}...`);