feat: Space Booking System - MVP complet

Sistem web pentru rezervarea de birouri și săli de ședință
cu flux de aprobare administrativă.

Stack: FastAPI + Vue.js 3 + SQLite + TypeScript

Features implementate:
- Autentificare JWT + Self-registration cu email verification
- CRUD Spații, Utilizatori, Settings (Admin)
- Calendar interactiv (FullCalendar) cu drag-and-drop
- Creare rezervări cu validare (durată, program, overlap, max/zi)
- Rezervări recurente (săptămânal)
- Admin: aprobare/respingere/anulare cereri
- Admin: creare directă rezervări (bypass approval)
- Admin: editare orice rezervare
- User: editare/anulare rezervări proprii
- Notificări in-app (bell icon + dropdown)
- Notificări email (async SMTP cu BackgroundTasks)
- Jurnal acțiuni administrative (audit log)
- Rapoarte avansate (utilizare, top users, approval rate)
- Șabloane rezervări (booking templates)
- Atașamente fișiere (upload/download)
- Conflict warnings (verificare disponibilitate real-time)
- Integrare Google Calendar (OAuth2)
- Suport timezone (UTC storage + user preference)
- 225+ teste backend

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/migrations/002_add_google_calendar.sql

@@ -0,0 +1,21 @@
+-- Migration: Add Google Calendar Integration
+-- Date: 2026-02-09
+
+-- Create google_calendar_tokens table
+CREATE TABLE IF NOT EXISTS google_calendar_tokens (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER NOT NULL UNIQUE,
+    access_token TEXT NOT NULL,
+    refresh_token TEXT NOT NULL,
+    token_expiry DATETIME,
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+);
+
+-- Add google_calendar_event_id column to bookings table
+ALTER TABLE bookings ADD COLUMN google_calendar_event_id VARCHAR(255);
+
+-- Create index for faster lookups
+CREATE INDEX IF NOT EXISTS idx_google_calendar_tokens_user_id ON google_calendar_tokens(user_id);
+CREATE INDEX IF NOT EXISTS idx_bookings_google_calendar_event_id ON bookings(google_calendar_event_id);

backend/migrations/003_add_user_timezone.sql

@@ -0,0 +1,11 @@
+-- Migration: Add timezone column to users table
+-- Date: 2026-02-09
+
+-- Add timezone column with default UTC
+ALTER TABLE users ADD COLUMN IF NOT EXISTS timezone VARCHAR(50) DEFAULT 'UTC' NOT NULL;
+
+-- Set existing users to UTC timezone
+UPDATE users SET timezone = 'UTC' WHERE timezone IS NULL;
+
+-- Add comment
+COMMENT ON COLUMN users.timezone IS 'User timezone preference (IANA format, e.g., Europe/Bucharest)';