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/config-setup.test.ts

@@ -161,9 +161,11 @@ describe('config setup wizard', () => {
 
   describe('provider: anthropic', () => {
     it('prompts for API key and saves to secret store', async () => {
-      // Answers: select provider, enter API key, select model
+      // Flow: simple → anthropic → (no existing key) → whichBinary('claude') returns null →
+      //   log tip → password prompt → select model
       const deps = buildDeps({
         answers: ['simple', 'anthropic', 'sk-ant-new-key', 'claude-haiku-3-5-20241022'],
+        whichBinary: vi.fn(async () => null),
       });
       await runSetup(deps);
 
@@ -194,15 +196,84 @@ describe('config setup wizard', () => {
 
     it('allows replacing existing key', async () => {
       // Answers: select provider, confirm change=true, enter new key, select model
+      // Change=true → promptForAnthropicKey → whichBinary returns null → password prompt
       const deps = buildDeps({
         secrets: { 'anthropic-api-key': 'sk-ant-old' },
         answers: ['simple', 'anthropic', true, 'sk-ant-new', 'claude-haiku-3-5-20241022'],
+        whichBinary: vi.fn(async () => null),
       });
       await runSetup(deps);
 
       expect(deps.secretStore.set).toHaveBeenCalledWith('anthropic-api-key', 'sk-ant-new');
       cleanup();
     });
+
+    it('detects claude binary and prompts for OAuth token', async () => {
+      // Flow: simple → anthropic → (no existing key) → whichBinary finds claude →
+      //   confirm OAuth=true → password prompt → select model
+      const deps = buildDeps({
+        answers: ['simple', 'anthropic', true, 'sk-ant-oat01-test-token', 'claude-haiku-3-5-20241022'],
+        whichBinary: vi.fn(async () => '/usr/bin/claude'),
+      });
+      await runSetup(deps);
+
+      expect(deps.secretStore.set).toHaveBeenCalledWith('anthropic-api-key', 'sk-ant-oat01-test-token');
+      expect(logs.some((l) => l.includes('Found Claude CLI at'))).toBe(true);
+      expect(logs.some((l) => l.includes('claude setup-token'))).toBe(true);
+      const config = readConfig();
+      const llm = config.llm as Record<string, unknown>;
+      expect(llm.provider).toBe('anthropic');
+      expect(llm.model).toBe('claude-haiku-3-5-20241022');
+      cleanup();
+    });
+
+    it('falls back to API key when claude binary not found', async () => {
+      // Flow: simple → anthropic → (no existing key) → whichBinary returns null →
+      //   password prompt (API key) → select model
+      const deps = buildDeps({
+        answers: ['simple', 'anthropic', 'sk-ant-api03-test', 'claude-sonnet-4-20250514'],
+        whichBinary: vi.fn(async () => null),
+      });
+      await runSetup(deps);
+
+      expect(deps.secretStore.set).toHaveBeenCalledWith('anthropic-api-key', 'sk-ant-api03-test');
+      expect(logs.some((l) => l.includes('Tip: Install Claude CLI'))).toBe(true);
+      const config = readConfig();
+      const llm = config.llm as Record<string, unknown>;
+      expect(llm.model).toBe('claude-sonnet-4-20250514');
+      cleanup();
+    });
+
+    it('shows OAuth label when existing token is OAuth', async () => {
+      // Flow: simple → anthropic → existing OAuth key → confirm change=false → select model
+      const deps = buildDeps({
+        secrets: { 'anthropic-api-key': 'sk-ant-oat01-existing-token' },
+        answers: ['simple', 'anthropic', false, 'claude-haiku-3-5-20241022'],
+      });
+      await runSetup(deps);
+
+      // Should NOT have called set (kept existing key)
+      expect(deps.secretStore.set).not.toHaveBeenCalled();
+      // Confirm prompt should have received an OAuth label
+      expect(deps.prompt.confirm).toHaveBeenCalledWith(
+        expect.stringContaining('OAuth token stored'),
+        false,
+      );
+      cleanup();
+    });
+
+    it('declines OAuth and enters API key instead', async () => {
+      // Flow: simple → anthropic → (no existing key) → whichBinary finds claude →
+      //   confirm OAuth=false → password prompt (API key) → select model
+      const deps = buildDeps({
+        answers: ['simple', 'anthropic', false, 'sk-ant-api03-manual', 'claude-sonnet-4-20250514'],
+        whichBinary: vi.fn(async () => '/usr/bin/claude'),
+      });
+      await runSetup(deps);
+
+      expect(deps.secretStore.set).toHaveBeenCalledWith('anthropic-api-key', 'sk-ant-api03-manual');
+      cleanup();
+    });
   });
 
   describe('provider: vllm', () => {
@@ -273,6 +344,44 @@ describe('config setup wizard', () => {
     });
   });
 
+  describe('advanced mode: duplicate names', () => {
+    it('generates unique default name when same provider added to both tiers', async () => {
+      // Flow: advanced →
+      //   add fast? yes → anthropic → name "anthropic" (default) → whichBinary null → key → model → add more? no →
+      //   add heavy? yes → anthropic → name "anthropic-2" (deduped default) → existing key, keep → model → add more? no
+      const deps = buildDeps({
+        answers: [
+          'advanced',
+          // fast tier
+          true,                          // add fast?
+          'anthropic',                   // fast provider type
+          'anthropic',                   // provider name (default)
+          'sk-ant-oat01-token',          // API key (whichBinary returns null → password prompt)
+          'claude-haiku-3-5-20241022',   // model
+          false,                         // add another fast?
+          // heavy tier
+          true,                          // add heavy?
+          'anthropic',                   // heavy provider type
+          'anthropic-2',                 // provider name (deduped default)
+          false,                         // keep existing key
+          'claude-opus-4-20250514',      // model
+          false,                         // add another heavy?
+        ],
+        whichBinary: vi.fn(async () => null),
+      });
+      await runSetup(deps);
+
+      const config = readConfig();
+      const llm = config.llm as { providers: Array<{ name: string; type: string; model: string; tier: string }> };
+      expect(llm.providers).toHaveLength(2);
+      expect(llm.providers[0].name).toBe('anthropic');
+      expect(llm.providers[0].tier).toBe('fast');
+      expect(llm.providers[1].name).toBe('anthropic-2');
+      expect(llm.providers[1].tier).toBe('heavy');
+      cleanup();
+    });
+  });
+
   describe('output messages', () => {
     it('shows restart instruction', async () => {
       const deps = buildDeps({ answers: ['simple', 'gemini-cli', 'gemini-2.5-flash'] });