feat: unified Claude API key and profile system with z.AI, MiniMax, OpenRouter support (#600)

* feat: add Claude API provider profiles for alternative endpoints

Add support for managing multiple Claude-compatible API endpoints
(z.AI GLM, AWS Bedrock, etc.) through provider profiles in settings.

Features:
- New ClaudeApiProfile type with base URL, API key, model mappings
- Pre-configured z.AI GLM template with correct model names
- Profile selector in Settings > Claude > API Profiles
- Clean switching between profiles and direct Anthropic API
- Immediate persistence to prevent data loss on restart

Profile support added to all execution paths:
- Agent service (chat)
- Ideation service
- Auto-mode service (feature agents, enhancements)
- Simple query service (title generation, descriptions, etc.)
- Backlog planning, commit messages, spec generation
- GitHub issue validation, suggestions

Environment variables set when profile is active:
- ANTHROPIC_BASE_URL, ANTHROPIC_AUTH_TOKEN/API_KEY
- ANTHROPIC_DEFAULT_HAIKU/SONNET/OPUS_MODEL
- API_TIMEOUT_MS, CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC

apps/ui/src/components/views/project-settings-view/config/navigation.ts

@@ -1,5 +1,5 @@
 import type { LucideIcon } from 'lucide-react';
-import { User, GitBranch, Palette, AlertTriangle } from 'lucide-react';
+import { User, GitBranch, Palette, AlertTriangle, Bot } from 'lucide-react';
 import type { ProjectSettingsViewId } from '../hooks/use-project-settings-view';
 
 export interface ProjectNavigationItem {
@@ -12,5 +12,6 @@ export const PROJECT_SETTINGS_NAV_ITEMS: ProjectNavigationItem[] = [
   { id: 'identity', label: 'Identity', icon: User },
   { id: 'worktrees', label: 'Worktrees', icon: GitBranch },
   { id: 'theme', label: 'Theme', icon: Palette },
+  { id: 'claude', label: 'Claude', icon: Bot },
   { id: 'danger', label: 'Danger Zone', icon: AlertTriangle },
 ];