feat: add Gemini and Bedrock model providers

Add native GeminiClient using @google/generative-ai SDK and BedrockClient
using @aws-sdk/client-bedrock-runtime. Replace the previous Gemini fallback
(OpenAI-compatible shim) with the real implementation. Add OpenRouter as a
provider option (OpenAI-compatible with custom baseURL). Update model costs,
doctor CLI checks, and client factory tests.

src/daemon/clientFactory.test.ts

@@ -4,6 +4,8 @@ import { AnthropicClient } from '../models/anthropic.js';
 import { OpenAIClient } from '../models/openai.js';
 import { OllamaClient } from '../models/local/ollama.js';
 import { LlamaCppClient } from '../models/local/llamacpp.js';
+import { GeminiClient } from '../models/gemini.js';
+import { BedrockClient } from '../models/bedrock.js';
 
 describe('createClientFromConfig', () => {
   it('creates AnthropicClient for anthropic provider', () => {
@@ -59,14 +61,13 @@ describe('createClientFromConfig', () => {
     expect(client).toBeInstanceOf(LlamaCppClient);
   });
 
-  it('creates OpenAI-compatible client for gemini provider (with warning)', () => {
+  it('creates GeminiClient for gemini provider', () => {
     const client = createClientFromConfig({
       provider: 'gemini',
       model: 'gemini-2.5-pro',
       api_key: 'test-key',
     });
-    // Gemini falls back to OpenAI-compatible client
-    expect(client).toBeInstanceOf(OpenAIClient);
+    expect(client).toBeInstanceOf(GeminiClient);
   });
 
   it('throws for unknown provider', () => {
@@ -75,4 +76,21 @@ describe('createClientFromConfig', () => {
       model: 'test',
     })).toThrow('Unknown model provider: unknown');
   });
+
+  it('creates OpenAIClient with OpenRouter baseURL for openrouter provider', () => {
+    const client = createClientFromConfig({
+      provider: 'openrouter',
+      model: 'meta-llama/llama-3.1-70b',
+      api_key: 'test-key',
+    });
+    expect(client).toBeInstanceOf(OpenAIClient);
+  });
+
+  it('creates BedrockClient for bedrock provider', () => {
+    const client = createClientFromConfig({
+      provider: 'bedrock',
+      model: 'anthropic.claude-3-sonnet',
+    });
+    expect(client).toBeInstanceOf(BedrockClient);
+  });
 });