Add FirePass provider support for Kimi K2.5 Turbo

- Add new 'firepass' provider type alongside anthropic, openai, openrouter
- FirePass uses Fireworks AI's endpoint for Kimi K2.5 Turbo model
- Subscription billing model ($7/week) with 256K context window
- Anthropic API compatible (uses Anthropic SDK with custom baseURL)

Changes:
- providers.ts: Add firepass detection and base URL handling
- auth.ts: Add FirePass API key management (FIREPASS_API_KEY or FIREWORKS_API_KEY)
- config.ts: Add firepassApiKey and firepass auth provider
- client.ts: Add firepass client creation with custom baseURL
- http.ts: Add firepass auth headers
- modelStrings.ts: Return Kimi K2.5 Turbo model ID for firepass
- model.ts: Add Kimi display name handling and default model logic
- modelOptions.ts: Simplified model picker for firepass (Kimi K2.5 Turbo only)
- status.tsx: Display FirePass in status bar
- login.tsx: Add FirePass option to provider selection
- FirepassLoginFlow.tsx: New component for FirePass login flow

Usage:
1. Run /login and select "FirePass"
2. Enter your Fireworks API key
3. Model picker shows Kimi K2.5 Turbo

src/utils/model/modelOptions.ts

@@ -45,6 +45,7 @@ export type ModelOption = {
 export function getDefaultOptionForUser(fastMode = false): ModelOption {
   const provider = getAPIProvider()
   const isOpenAI = provider === 'openai'
+  const isFirepass = provider === 'firepass'
   if (process.env.USER_TYPE === 'ant') {
     const currentModel = renderDefaultModelSetting(
       getDefaultMainLoopModelSetting(),
@@ -68,6 +69,14 @@ export function getDefaultOptionForUser(fastMode = false): ModelOption {
 
   // PAYG
   const is3P = provider !== 'firstParty'
+  if (isFirepass) {
+    return {
+      value: null,
+      label: 'Default (recommended)',
+      description: 'Use Kimi K2.5 Turbo (FirePass subscription)',
+      descriptionForModel: 'Kimi K2.5 Turbo - FirePass subscription with 256K context',
+    }
+  }
   return {
     value: null,
     label: 'Default (recommended)',
@@ -109,6 +118,16 @@ function getSonnet46Option(): ModelOption {
         'GPT-5.4 - recommended for most coding and agentic tasks on OpenAI',
     }
   }
+  if (provider === 'firepass') {
+    const firepassModel = getModelStrings().sonnet46
+    return {
+      value: firepassModel,
+      label: 'Kimi K2.5 Turbo',
+      description: 'Kimi K2.5 Turbo · FirePass subscription model',
+      descriptionForModel:
+        'Kimi K2.5 Turbo - FirePass subscription with 256K context, no per-token charges',
+    }
+  }
   return {
     value: is3P ? getModelStrings().sonnet46 : 'sonnet',
     label: 'Sonnet',
@@ -156,6 +175,16 @@ function getOpus46Option(fastMode = false): ModelOption {
         'GPT-5.4 - most capable OpenAI model for complex coding work',
     }
   }
+  if (provider === 'firepass') {
+    const firepassModel = getModelStrings().opus46
+    return {
+      value: firepassModel,
+      label: 'Kimi K2.5 Turbo',
+      description: 'Kimi K2.5 Turbo · FirePass subscription model',
+      descriptionForModel:
+        'Kimi K2.5 Turbo - FirePass subscription with 256K context, no per-token charges',
+    }
+  }
   return {
     value: is3P ? getModelStrings().opus46 : 'opus',
     label: 'Opus',
@@ -176,6 +205,17 @@ export function getSonnet46_1MOption(): ModelOption {
         'GPT-5.4 for long-running OpenAI sessions and large codebases',
     }
   }
+  if (provider === 'firepass') {
+    // FirePass Kimi has 256K context, no need for separate 1M option
+    const firepassModel = getModelStrings().sonnet46
+    return {
+      value: firepassModel,
+      label: 'Kimi K2.5 Turbo',
+      description: 'Kimi K2.5 Turbo · 256K context included',
+      descriptionForModel:
+        'Kimi K2.5 Turbo - 256K context window for long sessions',
+    }
+  }
   return {
     value: is3P ? getModelStrings().sonnet46 + '[1m]' : 'sonnet[1m]',
     label: 'Sonnet (1M context)',
@@ -197,6 +237,17 @@ export function getOpus46_1MOption(fastMode = false): ModelOption {
         'GPT-5.4 for long-running OpenAI sessions and large codebases',
     }
   }
+  if (provider === 'firepass') {
+    // FirePass Kimi has 256K context, no need for separate 1M option
+    const firepassModel = getModelStrings().opus46
+    return {
+      value: firepassModel,
+      label: 'Kimi K2.5 Turbo',
+      description: 'Kimi K2.5 Turbo · 256K context included',
+      descriptionForModel:
+        'Kimi K2.5 Turbo - 256K context window for long sessions',
+    }
+  }
   return {
     value: is3P ? getModelStrings().opus46 + '[1m]' : 'opus[1m]',
     label: 'Opus (1M context)',
@@ -234,6 +285,16 @@ function getHaiku45Option(): ModelOption {
         'GPT-5.4 Mini - fastest OpenAI option for quick answers and lightweight tasks',
     }
   }
+  if (provider === 'firepass') {
+    const firepassModel = getModelStrings().haiku45
+    return {
+      value: firepassModel,
+      label: 'Kimi K2.5 Turbo',
+      description: 'Kimi K2.5 Turbo · FirePass subscription model',
+      descriptionForModel:
+        'Kimi K2.5 Turbo - FirePass subscription with 256K context, no per-token charges',
+    }
+  }
   return {
     value: 'haiku',
     label: 'Haiku',
@@ -255,6 +316,16 @@ function getHaiku35Option(): ModelOption {
         'GPT-5.4 Mini - lower latency OpenAI model for simple tasks',
     }
   }
+  if (provider === 'firepass') {
+    const firepassModel = getModelStrings().haiku35
+    return {
+      value: firepassModel,
+      label: 'Kimi K2.5 Turbo',
+      description: 'Kimi K2.5 Turbo · FirePass subscription model',
+      descriptionForModel:
+        'Kimi K2.5 Turbo - FirePass subscription with 256K context, no per-token charges',
+    }
+  }
   return {
     value: 'haiku',
     label: 'Haiku',
@@ -405,6 +476,19 @@ function getModelOptionsBase(fastMode = false): ModelOption[] {
     return payg1POptions
   }
 
+  // FirePass: Simple list with just Kimi K2.5 Turbo
+  if (getAPIProvider() === 'firepass') {
+    const firepassModel = getModelStrings().sonnet46
+    return [
+      getDefaultOptionForUser(fastMode),
+      {
+        value: firepassModel,
+        label: 'Kimi K2.5 Turbo',
+        description: 'Kimi K2.5 Turbo · 256K context, subscription billing',
+      },
+    ]
+  }
+
   // PAYG 3P: Default (Sonnet 4.5) + Sonnet (3P custom) or Sonnet 4.6/1M + Opus (3P custom) or Opus 4.1/Opus 4.6/Opus1M + Haiku + Opus 4.1
   const payg3pOptions = [getDefaultOptionForUser(fastMode)]