feat: add Moonshot AI (Kimi) provider and update xAI Grok models (#1953)

- Add comprehensive Moonshot AI provider with 11 models including:
  * Legacy moonshot-v1 series (8k, 32k, 128k context)
  * Latest Kimi K2 models (K2 Preview, Turbo, Thinking)
  * Vision-enabled models for multimodal capabilities
  * Auto-selecting model variants

- Update xAI provider with latest Grok models:
  * Add Grok 4 (256K context) and Grok 4 (07-09) variant
  * Add Grok 3 Mini Beta and Mini Fast Beta variants
  * Update context limits to match actual model capabilities
  * Remove outdated grok-beta and grok-2-1212 models

- Add MOONSHOT_API_KEY to environment configuration
- Register Moonshot provider in service status monitoring
- Full OpenAI-compatible API integration via api.moonshot.ai
- Fix TypeScript errors in GitHub provider

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

app/lib/modules/llm/providers/perplexity.ts

@@ -14,20 +14,20 @@ export default class PerplexityProvider extends BaseProvider {
 
   staticModels: ModelInfo[] = [
     {
-      name: 'llama-3.1-sonar-small-128k-online',
-      label: 'Sonar Small Online',
+      name: 'sonar',
+      label: 'Sonar',
       provider: 'Perplexity',
       maxTokenAllowed: 8192,
     },
     {
-      name: 'llama-3.1-sonar-large-128k-online',
-      label: 'Sonar Large Online',
+      name: 'sonar-pro',
+      label: 'Sonar Pro',
       provider: 'Perplexity',
       maxTokenAllowed: 8192,
     },
     {
-      name: 'llama-3.1-sonar-huge-128k-online',
-      label: 'Sonar Huge Online',
+      name: 'sonar-reasoning-pro',
+      label: 'Sonar Reasoning Pro',
       provider: 'Perplexity',
       maxTokenAllowed: 8192,
     },