feat: v0.0.1 - Groq provider, timezone, journal context, test connection, task logging

Added:
- Groq AI provider (free, fast with llama-3.3-70b-versatile)
- Timezone setting (22 timezones)
- Journal context: include previous journals (3/7/14/30 days)
- Test connection button for AI providers
- Per-provider settings (API key, model, base URL remembered)
- Detailed task logging (full prompts and responses)
- Tasks page with expandable details
- Progress modal with steps and AI output details

Fixed:
- Groq API endpoint (https://api.groq.com/openai/v1/chat/completions)
- Ollama baseUrl leaking to other providers
- Database schema references
- Proper Prisma migrations (data-safe)

Changed:
- Default AI: OpenAI → Groq
- Project renamed: TotalRecall → DearDiary
- Strict anti-hallucination prompt
- Docker uses prisma migrate deploy (non-destructive)

backend/src/services/ai/provider.ts

@@ -1,11 +1,11 @@
 export interface AIProvider {
-  provider: 'openai' | 'anthropic' | 'ollama' | 'lmstudio';
+  provider: 'openai' | 'anthropic' | 'ollama' | 'lmstudio' | 'groq';
   generate(prompt: string, systemPrompt?: string): Promise<string>;
   validate?(): Promise<boolean>;
 }
 
 export interface AIProviderConfig {
-  provider: 'openai' | 'anthropic' | 'ollama' | 'lmstudio';
+  provider: 'openai' | 'anthropic' | 'ollama' | 'lmstudio' | 'groq';
   apiKey: string;
   model?: string;
   baseUrl?: string;
@@ -15,6 +15,7 @@ import { OpenAIProvider } from './openai';
 import { AnthropicProvider } from './anthropic';
 import { OllamaProvider } from './ollama';
 import { LMStudioProvider } from './lmstudio';
+import { GroqProvider } from './groq';
 
 export function createAIProvider(config: AIProviderConfig): AIProvider {
   switch (config.provider) {
@@ -26,6 +27,8 @@ export function createAIProvider(config: AIProviderConfig): AIProvider {
       return new OllamaProvider(config);
     case 'lmstudio':
       return new LMStudioProvider(config);
+    case 'groq':
+      return new GroqProvider(config);
     default:
       throw new Error(`Unknown AI provider: ${config.provider}`);
   }