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/terminal-view.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect, useCallback, useMemo, useRef } from 'react';
+import React, { useState, useEffect, useCallback, useRef } from 'react';
 import { useNavigate } from '@tanstack/react-router';
 import { createLogger } from '@automaker/utils/logger';
 import {
@@ -58,7 +58,7 @@ import {
   defaultDropAnimationSideEffects,
 } from '@dnd-kit/core';
 import { cn } from '@/lib/utils';
-import { apiFetch, apiGet, apiPost, apiDeleteRaw, getAuthHeaders } from '@/lib/api-fetch';
+import { apiFetch, apiGet, apiPost, apiDeleteRaw } from '@/lib/api-fetch';
 import { getApiKey } from '@/lib/http-api-client';
 
 const logger = createLogger('Terminal');
@@ -244,7 +244,6 @@ export function TerminalView({ initialCwd, initialBranch, initialMode, nonce }:
     reorderTerminalTabs,
     moveTerminalToTab,
     setTerminalPanelFontSize,
-    setTerminalTabLayout,
     toggleTerminalMaximized,
     saveTerminalLayout,
     getPersistedTerminalLayout,