feat: enhance SDK options with thinking level support

- Introduced a new function, buildThinkingOptions, to handle the conversion of ThinkingLevel to maxThinkingTokens for the Claude SDK.
- Updated existing SDK option creation functions to incorporate thinking options, ensuring that maxThinkingTokens are included based on the specified thinking level.
- Enhanced the settings service to support migration of phase models to include thinking levels, improving compatibility with new configurations.
- Added comprehensive tests for thinking level integration and migration logic, ensuring robust functionality across the application.

This update significantly improves the SDK's configurability and performance by allowing for more nuanced control over reasoning capabilities.

apps/server/src/routes/suggestions/generate-suggestions.ts

@@ -9,7 +9,7 @@ import { query } from '@anthropic-ai/claude-agent-sdk';
 import type { EventEmitter } from '../../lib/events.js';
 import { createLogger } from '@automaker/utils';
 import { DEFAULT_PHASE_MODELS, isCursorModel } from '@automaker/types';
-import { resolveModelString } from '@automaker/model-resolver';
+import { resolvePhaseModel } from '@automaker/model-resolver';
 import { createSuggestionsOptions } from '../../lib/sdk-options.js';
 import { extractJsonWithArray } from '../../lib/json-extractor.js';
 import { ProviderFactory } from '../../providers/provider-factory.js';
@@ -173,9 +173,9 @@ The response will be automatically formatted as structured JSON.`;
 
   // Get model from phase settings (Feature Enhancement = enhancementModel)
   const settings = await settingsService?.getGlobalSettings();
-  const enhancementModel =
+  const phaseModelEntry =
     settings?.phaseModels?.enhancementModel || DEFAULT_PHASE_MODELS.enhancementModel;
-  const model = resolveModelString(enhancementModel);
+  const { model, thinkingLevel } = resolvePhaseModel(phaseModelEntry);
 
   logger.info('[Suggestions] Using model:', model);
 
@@ -247,6 +247,7 @@ Your entire response should be valid JSON starting with { and ending with }. No
       abortController,
       autoLoadClaudeMd,
       model, // Pass the model from settings
+      thinkingLevel, // Pass thinking level for extended thinking
       outputFormat: {
         type: 'json_schema',
         schema: suggestionsSchema,