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/components/multirun/BranchSelector.tsx

@@ -17,12 +17,6 @@ import { useI18n } from '@/lib/i18n';
 /** localStorage key matching NewWorktreeDialog */
 const LAST_SOURCE_BRANCH_KEY = 'oc:lastWorktreeSourceBranch';
 
-export type WorktreeBaseOption = {
-  value: string;
-  label: string;
-  group: 'special' | 'local' | 'remote';
-};
-
 export interface BranchSelectorProps {
   /** Current directory to check for git repository */
   directory: string | null;

packages/ui/src/components/multirun/ModelMultiSelect.tsx

@@ -22,14 +22,6 @@ export interface ModelSelectionWithId {
   instanceId: string;
 }
 
-/** Model selection without instanceId (for external use) */
-export interface ModelSelection {
-  providerID: string;
-  modelID: string;
-  displayName?: string;
-  variant?: string;
-}
-
 // eslint-disable-next-line react-refresh/only-export-components -- Utility is tightly coupled with ModelMultiSelect
 export const generateInstanceId = (): string => {
   return `${Date.now()}-${Math.random().toString(36).substring(2, 9)}`;
@@ -39,7 +31,7 @@ export const generateInstanceId = (): string => {
  * Model selection chip with remove button.
  * Shows instance index (e.g., "(2)") when same model is selected multiple times.
  */
-export const ModelChip: React.FC<{
+const ModelChip: React.FC<{
   model: ModelSelectionWithId;
   instanceIndex: number;
   totalSameModel: number;

packages/ui/src/components/multirun/index.ts

@@ -1,4 +1 @@
 export { MultiRunLauncher } from './MultiRunLauncher';
-export { ModelMultiSelect, ModelChip, generateInstanceId, type ModelSelectionWithId, type ModelSelection, type ModelMultiSelectProps } from './ModelMultiSelect';
-export { BranchSelector, useBranchOptions, type BranchSelectorProps, type BranchSelectorState, type WorktreeBaseOption } from './BranchSelector';
-export { AgentSelector, type AgentSelectorProps } from './AgentSelector';