v0.2.1 — Code Review Fixes

Fixes:
- CRITICAL: compareVersions used string comparison, fails for 1.10 vs 1.9 (now numeric)
- CRITICAL: Double CloseDatabase() in main.go (defer + OnShutdown)
- CRITICAL: Tailwind v4 in package.json but v3 config/syntax (downgraded to v3)
- CRITICAL: react-router-dom v7 with v5 types (switched to v6, removed deprecated types)
- IMPORTANT: UpdatePlanEntry hook signature mismatch (7 args vs Go's 4)
- IMPORTANT: AllergenPicker hidden checkbox inaccessible to screenreaders (sr-only)
- IMPORTANT: weekHelper getWeekFromDate returned wrong ISO year for edge cases
- IMPORTANT: getWeeksInYear bug for years where Dec 31 is in week 1 of next year
- IMPORTANT: getDateFromWeek off-by-one for some years (use Jan 4 anchor)
- IMPORTANT: ProductSearch click-outside missed dropdown (use container ref)
- IMPORTANT: seed.go LastInsertId=0 on INSERT OR IGNORE skip
- IMPORTANT: SQLite missing PRAGMA foreign_keys=ON and WAL mode
- IMPORTANT: AdditivePicker ADDITIVE_NAMES used numeric IDs but data uses letters
- IMPORTANT: Missing role=dialog/aria-modal on all modal dialogs
- IMPORTANT: Missing Escape key handler on ProductForm modal
- IMPORTANT: Sidebar NavLink aria-current used function instead of string
- IMPORTANT: useProducts searchProducts null safety for allergens/additives
- NICE-TO-HAVE: Added aria-live=polite to WeekPlanner for dynamic updates
- NICE-TO-HAVE: Added postcss.config.js for Tailwind v3
- NICE-TO-HAVE: Updated model comments to match actual day/meal conventions
- NICE-TO-HAVE: Modernized vite/typescript/plugin versions

main.go

@@ -19,13 +19,6 @@ func main() {
 		log.Fatalf("Failed to initialize database: %v", err)
 	}
 
-	// Sicherstellen, dass die Datenbank ordnungsgemäß geschlossen wird
-	defer func() {
-		if err := CloseDatabase(); err != nil {
-			log.Printf("Error closing database: %v", err)
-		}
-	}()
-
 	// Create an instance of the app structure
 	app := NewApp()