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/mcplocal/vitest.smoke.config.ts

@@ -0,0 +1,13 @@
+import { defineProject } from 'vitest/config';
+
+export default defineProject({
+  test: {
+    name: 'smoke',
+    include: ['tests/smoke/**/*.test.ts'],
+    testTimeout: 60_000,
+    hookTimeout: 30_000,
+    // Stream console output directly — don't buffer behind vitest prefixes
+    disableConsoleIntercept: true,
+    reporters: ['default'],
+  },
+});