chore: Fix all lint errors and remove unused code

- Fix 75 ESLint errors by updating eslint.config.mjs:
  - Add missing browser globals (MouseEvent, AbortController, Response, etc.)
  - Add Vite define global (__APP_VERSION__)
  - Configure @ts-nocheck to require descriptions
  - Add no-unused-vars rule for .mjs scripts

- Fix runtime bug in agent-output-modal.tsx (setOutput -> setStreamedContent)

- Remove ~120 unused variable warnings across 97 files:
  - Remove unused imports (React hooks, lucide icons, types)
  - Remove unused constants and variables
  - Remove unused function definitions
  - Prefix intentionally unused parameters with underscore

- Add descriptions to all @ts-nocheck comments (25 files)

- Clean up misc issues:
  - Remove invalid deprecation plugin comments
  - Fix eslint-disable comment placement
  - Add missing RefreshCw import in code-view.tsx

Reduces lint warnings from ~300 to 67 (all remaining are no-explicit-any)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/components/views/board-view/dialogs/follow-up-dialog.tsx

@@ -1,5 +1,3 @@
-import { useState } from 'react';
-import { createLogger } from '@automaker/utils/logger';
 import {
   Dialog,
   DialogContent,
@@ -18,14 +16,7 @@ import {
 } from '@/components/ui/description-image-dropzone';
 import { MessageSquare } from 'lucide-react';
 import { Feature } from '@/store/app-store';
-import {
-  EnhanceWithAI,
-  EnhancementHistoryButton,
-  type EnhancementMode,
-  type BaseHistoryEntry,
-} from '../shared';
-
-const logger = createLogger('FollowUpDialog');
+import { EnhanceWithAI, EnhancementHistoryButton, type BaseHistoryEntry } from '../shared';
 
 /**
  * A single entry in the follow-up prompt history