feat: add support for Atomic Chat provider

- Introduced a new provider profile for Atomic Chat, allowing it to be used alongside existing providers.
- Updated `package.json` to include a new development script for launching Atomic Chat.
- Modified `smart_router.py` to recognize Atomic Chat as a local provider that does not require an API key.
- Enhanced provider discovery and launch scripts to handle Atomic Chat, including model listing and connection checks.
- Added tests to ensure proper environment setup and behavior for Atomic Chat profiles.

This update expands the functionality of the application to support local LLMs via Atomic Chat, improving versatility for users.

src/utils/providerProfile.test.ts

@@ -5,6 +5,7 @@ import { join } from 'node:path'
 import test from 'node:test'
 
 import {
+  buildAtomicChatProfileEnv,
   buildCodexProfileEnv,
   buildGeminiProfileEnv,
   buildLaunchEnv,
@@ -381,3 +382,72 @@ test('auto profile falls back to openai when no viable ollama model exists', ()
   assert.equal(selectAutoProfile(null), 'openai')
   assert.equal(selectAutoProfile('qwen2.5-coder:7b'), 'ollama')
 })
+
+// ── Atomic Chat profile tests ────────────────────────────────────────────────
+
+test('atomic-chat profiles never persist openai api keys', () => {
+  const env = buildAtomicChatProfileEnv('some-local-model', {
+    getAtomicChatChatBaseUrl: () => 'http://127.0.0.1:1337/v1',
+  })
+
+  assert.deepEqual(env, {
+    OPENAI_BASE_URL: 'http://127.0.0.1:1337/v1',
+    OPENAI_MODEL: 'some-local-model',
+  })
+  assert.equal('OPENAI_API_KEY' in env, false)
+})
+
+test('atomic-chat profiles respect custom base url', () => {
+  const env = buildAtomicChatProfileEnv('my-model', {
+    baseUrl: 'http://192.168.1.100:1337',
+    getAtomicChatChatBaseUrl: (baseUrl?: string) =>
+      baseUrl ? `${baseUrl}/v1` : 'http://127.0.0.1:1337/v1',
+  })
+
+  assert.equal(env.OPENAI_BASE_URL, 'http://192.168.1.100:1337/v1')
+  assert.equal(env.OPENAI_MODEL, 'my-model')
+})
+
+test('matching persisted atomic-chat env is reused for atomic-chat launch', async () => {
+  const env = await buildLaunchEnv({
+    profile: 'atomic-chat',
+    persisted: profile('atomic-chat', {
+      OPENAI_BASE_URL: 'http://127.0.0.1:1337/v1',
+      OPENAI_MODEL: 'llama-3.1-8b',
+    }),
+    goal: 'balanced',
+    processEnv: {},
+    getAtomicChatChatBaseUrl: () => 'http://127.0.0.1:1337/v1',
+    resolveAtomicChatDefaultModel: async () => 'other-model',
+  })
+
+  assert.equal(env.OPENAI_BASE_URL, 'http://127.0.0.1:1337/v1')
+  assert.equal(env.OPENAI_MODEL, 'llama-3.1-8b')
+  assert.equal(env.OPENAI_API_KEY, undefined)
+  assert.equal(env.CODEX_API_KEY, undefined)
+})
+
+test('atomic-chat launch ignores mismatched persisted openai env', async () => {
+  const env = await buildLaunchEnv({
+    profile: 'atomic-chat',
+    persisted: profile('openai', {
+      OPENAI_BASE_URL: 'https://api.openai.com/v1',
+      OPENAI_MODEL: 'gpt-4o',
+      OPENAI_API_KEY: 'sk-persisted',
+    }),
+    goal: 'balanced',
+    processEnv: {
+      OPENAI_API_KEY: 'sk-live',
+      CODEX_API_KEY: 'codex-live',
+      CHATGPT_ACCOUNT_ID: 'acct_live',
+    },
+    getAtomicChatChatBaseUrl: () => 'http://127.0.0.1:1337/v1',
+    resolveAtomicChatDefaultModel: async () => 'local-model',
+  })
+
+  assert.equal(env.OPENAI_BASE_URL, 'http://127.0.0.1:1337/v1')
+  assert.equal(env.OPENAI_MODEL, 'local-model')
+  assert.equal(env.OPENAI_API_KEY, undefined)
+  assert.equal(env.CODEX_API_KEY, undefined)
+  assert.equal(env.CHATGPT_ACCOUNT_ID, undefined)
+})