feat: eager vLLM warmup and smart page titles in paginate stage

- Add warmup() to LlmProvider interface for eager subprocess startup
- ManagedVllmProvider.warmup() starts vLLM in background on project load
- ProviderRegistry.warmupAll() triggers all managed providers
- NamedProvider proxies warmup() to inner provider
- paginate stage generates LLM-powered descriptive page titles when
  available, cached by content hash, falls back to generic "Page N"
- project-mcp-endpoint calls warmupAll() on router creation so vLLM
  is loading while the session initializes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/tests/commands/claude.test.ts

@@ -96,7 +96,7 @@ describe('config claude', () => {
     const written = JSON.parse(readFileSync(outPath, 'utf-8'));
     expect(written.mcpServers['mcpctl-inspect']).toEqual({
       command: 'mcpctl',
-      args: ['console', '--inspect', '--stdin-mcp'],
+      args: ['console', '--stdin-mcp'],
     });
     expect(output.join('\n')).toContain('1 server(s)');
   });