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/providers/claude-provider.ts

@@ -8,6 +8,7 @@
 import { query, type Options } from '@anthropic-ai/claude-agent-sdk';
 import { BaseProvider } from './base-provider.js';
 import { classifyError, getUserFriendlyErrorMessage } from '@automaker/utils';
+import { getThinkingTokenBudget } from '@automaker/types';
 import type {
   ExecuteOptions,
   ProviderMessage,
@@ -60,8 +61,12 @@ export class ClaudeProvider extends BaseProvider {
       abortController,
       conversationHistory,
       sdkSessionId,
+      thinkingLevel,
     } = options;
 
+    // Convert thinking level to token budget
+    const maxThinkingTokens = getThinkingTokenBudget(thinkingLevel);
+
     // Build Claude SDK options
     // MCP permission logic - determines how to handle tool permissions when MCP servers are configured.
     // This logic mirrors buildMcpOptions() in sdk-options.ts but is applied here since
@@ -103,6 +108,8 @@ export class ClaudeProvider extends BaseProvider {
       ...(options.sandbox && { sandbox: options.sandbox }),
       // Forward MCP servers configuration
       ...(options.mcpServers && { mcpServers: options.mcpServers }),
+      // Extended thinking configuration
+      ...(maxThinkingTokens && { maxThinkingTokens }),
     };
 
     // Build prompt payload