docs: add complete NotebookLM MCP integration documentation

Added comprehensive documentation for NotebookLM MCP server integration
in Claude Code, covering all 16 tools across 3 profiles (minimal/standard/full).

## Changes

### guide/ai-ecosystem.md (~330 new lines)

**§ 4.1 - Enhanced installation section**:
- Detailed tool breakdown table (16 tools × 3 profiles)
- Profile comparison with recommended defaults
- Multi-account authentication workflow
- Share links library building pattern

**§ 4.2 - Advanced Features (Full Profile)** (~110 lines):
- remove_notebook: Library cleanup
- re_auth: Google account switching
- cleanup_data: Complete MCP reset with preserve_library option
- Manual browser control (3 functions): state inspection, actions, element waiting

**§ 4.3 - Browser Options** (~70 lines):
- Complete options reference (headless, timeout, viewport, stealth)
- Stealth mode configuration (typing speed, delays, mouse movements)
- Usage examples: debug visually, custom timeouts, disable stealth

**§ 4.4 - Session Management** (~60 lines):
- Session lifecycle and properties (15min timeout, 10 max concurrent)
- Automatic vs manual session control
- List/resume/force new session workflows

**§ 4.5 - Library Management Best Practices** (~90 lines):
- Naming conventions and topics strategy
- Metadata refinement workflow (add → use → refine → archive)
- Search and discovery patterns
- Notebook lifecycle management

### guide/ultimate-guide.md

- Updated Complementary Tools table: Added "MCP integration" mention
- Added redirect note to ai-ecosystem.md § 4.1

### README.md

- Template count updated (86 → 83) to reflect current state

## Coverage

- ✅ All 16 MCP tools documented
- ✅ 3 profiles explained (minimal/standard/full)
- ✅ Installation, auth, queries, advanced features
- ✅ Browser options, session management, best practices
- ✅ Troubleshooting and examples

## Testing

- Installation: Verified (standard profile)
- Authentication: Tested with multi-account setup (authuser=1)
- Library: 4 notebooks added and queried successfully
- Advanced features: Documented from API spec (not yet tested in practice)

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

guide/ultimate-guide.md

@@ -14225,7 +14225,7 @@ The goal isn't replacement—it's **chaining the right tool for each step**.
 | **[Perplexity](https://perplexity.ai)** | Research with verified sources | 5 Pro searches/day | $20/month |
 | **[Gemini](https://gemini.google.com)** | Image understanding → code | Generous | $19.99/month |
 | **[Kimi](https://kimi.ai)** | PPTX generation, 128K context | Generous | Free |
-| **[NotebookLM](https://notebooklm.google.com)** | Doc synthesis + audio | Full features | Free |
+| **[NotebookLM](https://notebooklm.google.com)** | Doc synthesis + audio + **MCP integration** | Full features | Free |
 | **[v0.dev](https://v0.dev)** | UI prototyping (Shadcn) | Limited | $20/month |
 | **[Cursor](https://cursor.sh)** | IDE with AI autocomplete | Limited | $20/month |
 | **[cc-copilot-bridge](https://github.com/FlorianBruniaux/cc-copilot-bridge)** | Multi-provider switching | Full | Copilot Pro+ $10/month |
@@ -14437,6 +14437,8 @@ Use when: You need to quickly understand a new codebase or create audio overview
 
 **When to use**: Joining new team, reviewing unfamiliar codebase, onboarding prep.
 
+> **💡 MCP Integration Available**: You can now query NotebookLM notebooks directly from Claude Code using the NotebookLM MCP server. See [ai-ecosystem.md § 4.1](./ai-ecosystem.md#41-notebooklm-mcp-integration) for installation and usage guide.
+
 ### Presentation Pipeline
 
 Use when: You need to communicate technical changes to stakeholders.