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/lib/messages/agentMentions.ts

@@ -1,12 +1,12 @@
 import type { Agent } from "@opencode-ai/sdk/v2";
 
-export interface AgentMentionSource {
+interface AgentMentionSource {
   value: string;
   start: number;
   end: number;
 }
 
-export interface ParsedAgentMention {
+interface ParsedAgentMention {
   name: string;
   source?: AgentMentionSource;
 }

packages/ui/src/lib/messages/executionMeta.ts

@@ -1,9 +1,3 @@
-export const EXECUTION_FORK_META_TEXT =
-    "This message comes from an AI assistant in another session. The user wants you to respond according to its content: " +
-    "if it is an implementation plan, your task is to implement that plan; " +
-    "if it is a conclusion or summary, your task is to verify it, explain whether you agree or disagree, and correct it if needed. " +
-    "Always clearly state what you understand your task to be, and wait for the user's approval of your conclusions before taking any further actions.";
-
 export const MULTIRUN_EXECUTION_FORK_PROMPT_META_TEXT =
     "This message bellow comes from an AI agent in another session. I want you to act according to its content: " +
     "if it is an implementation plan, your task is to implement that plan; " +
@@ -12,9 +6,6 @@ export const MULTIRUN_EXECUTION_FORK_PROMPT_META_TEXT =
     "Proceed with actions right away based on your understanding of the task. " +
     "Here is the content of the message: ";
 
-export const isExecutionForkMetaText = (text: string | null | undefined): boolean =>
-    typeof text === 'string' && text.trim() === EXECUTION_FORK_META_TEXT.trim();
-
 // Default, user-editable instructions prefilled in the "Start new session from
 // this answer" dialog. Mirrors the previous fixed fork instruction so existing
 // behavior is preserved unless the user edits it.
@@ -26,7 +17,7 @@ export const EXECUTION_FORK_DEFAULT_INSTRUCTIONS =
 
 // Fixed connective that opens the forked assistant content. Not editable by the
 // user — it sits between the user's instructions and the assistant message.
-export const EXECUTION_FORK_CONTENT_PREFACE =
+const EXECUTION_FORK_CONTENT_PREFACE =
     "This message below comes from an AI agent in another session. Here is the content of the message:";
 
 // Builds the final message sent to the new session:

packages/ui/src/lib/messages/inlineComments.ts

@@ -4,7 +4,7 @@ import type { InlineCommentDraft } from '@/stores/useInlineCommentDraftStore';
  * Format a single inline comment draft into the standard message format
  * used by diff, plan, and file viewers
  */
-export function formatInlineCommentDraft(draft: InlineCommentDraft): string {
+function formatInlineCommentDraft(draft: InlineCommentDraft): string {
   const { fileLabel, startLine, endLine, side, language, code, text } = draft;
   
   // Diff format includes side (original/modified)
@@ -28,7 +28,7 @@ export function formatInlineCommentDraft(draft: InlineCommentDraft): string {
  * Format multiple inline comment drafts into a single string
  * with each comment separated by a blank line
  */
-export function formatInlineCommentDrafts(drafts: InlineCommentDraft[]): string {
+function formatInlineCommentDrafts(drafts: InlineCommentDraft[]): string {
   if (drafts.length === 0) return '';
 
   if (drafts.every((draft) => draft.source === 'preview-annotation')) {
@@ -55,16 +55,3 @@ export function appendInlineComments(text: string, drafts: InlineCommentDraft[])
   return `${text}\n\n${formattedComments}`;
 }
 
-/**
- * Check if a message text contains inline comments (for validation purposes)
- */
-export function hasInlineComments(text: string): boolean {
-  return text.includes('Comment on `') && text.includes('```');
-}
-
-/**
- * Extract the file label from a draft for display purposes
- */
-export function getDraftDisplayLabel(draft: InlineCommentDraft): string {
-  return `${draft.fileLabel}:${draft.startLine}-${draft.endLine}`;
-}

packages/ui/src/lib/messages/inlineMessageLinks.ts

@@ -1,5 +1,5 @@
-export const SKILL_LINK_PREFIX = '#openchamber-skill:';
-export const AGENT_LINK_PREFIX = '#openchamber-agent:';
+const SKILL_LINK_PREFIX = '#openchamber-skill:';
+const AGENT_LINK_PREFIX = '#openchamber-agent:';
 
 export const buildAgentMentionUrl = (name: string): string => {
     const encoded = encodeURIComponent(name);