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/server/src/routes/context/routes/describe-file.ts

@@ -22,6 +22,7 @@ import type { SettingsService } from '../../../services/settings-service.js';
 import {
   getAutoLoadClaudeMdSetting,
   getPromptCustomization,
+  getActiveClaudeApiProfile,
 } from '../../../lib/settings-helpers.js';
 
 const logger = createLogger('DescribeFile');
@@ -165,6 +166,13 @@ ${contentToAnalyze}`;
 
       logger.info(`Resolved model: ${model}, thinkingLevel: ${thinkingLevel}`);
 
+      // Get active Claude API profile for alternative endpoint configuration
+      const { profile: claudeApiProfile, credentials } = await getActiveClaudeApiProfile(
+        settingsService,
+        '[DescribeFile]',
+        cwd
+      );
+
       // Use simpleQuery - provider abstraction handles routing to correct provider
       const result = await simpleQuery({
         prompt,
@@ -175,6 +183,8 @@ ${contentToAnalyze}`;
         thinkingLevel,
         readOnly: true, // File description only reads, doesn't write
         settingSources: autoLoadClaudeMd ? ['user', 'project', 'local'] : undefined,
+        claudeApiProfile, // Pass active Claude API profile for alternative endpoint configuration
+        credentials, // Pass credentials for resolving 'credentials' apiKeySource
       });
 
       const description = result.text;

apps/server/src/routes/context/routes/describe-image.ts

@@ -22,6 +22,7 @@ import type { SettingsService } from '../../../services/settings-service.js';
 import {
   getAutoLoadClaudeMdSetting,
   getPromptCustomization,
+  getActiveClaudeApiProfile,
 } from '../../../lib/settings-helpers.js';
 
 const logger = createLogger('DescribeImage');
@@ -284,6 +285,13 @@ export function createDescribeImageHandler(
       // Get customized prompts from settings
       const prompts = await getPromptCustomization(settingsService, '[DescribeImage]');
 
+      // Get active Claude API profile for alternative endpoint configuration
+      const { profile: claudeApiProfile, credentials } = await getActiveClaudeApiProfile(
+        settingsService,
+        '[DescribeImage]',
+        cwd
+      );
+
       // Build the instruction text from centralized prompts
       const instructionText = prompts.contextDescription.describeImagePrompt;
 
@@ -325,6 +333,8 @@ export function createDescribeImageHandler(
         thinkingLevel,
         readOnly: true, // Image description only reads, doesn't write
         settingSources: autoLoadClaudeMd ? ['user', 'project', 'local'] : undefined,
+        claudeApiProfile, // Pass active Claude API profile for alternative endpoint configuration
+        credentials, // Pass credentials for resolving 'credentials' apiKeySource
       });
 
       logger.info(`[${requestId}] simpleQuery completed in ${Date.now() - queryStart}ms`);