fix: resolve runtime errors and missing routes

- Fix $effect orphan error: move $effect calls from store constructors
  to initEffects() methods called from component context
- Fix icon rendering: create DynamicIcon component to render Lucide icons
  from name strings instead of displaying raw text
- Add /boards/new route for board creation
- Fix seed emails (admin@launcher.local / user@launcher.local) to pass
  Zod email validation

prisma/seed.ts

@@ -29,10 +29,10 @@ async function main() {
 	// --- Admin User ---
 	const adminPassword = await bcrypt.hash('admin123', 12);
 	const admin = await prisma.user.upsert({
-		where: { email: 'admin@localhost' },
+		where: { email: 'admin@launcher.local' },
 		update: {},
 		create: {
-			email: 'admin@localhost',
+			email: 'admin@launcher.local',
 			password: adminPassword,
 			displayName: 'Administrator',
 			role: 'admin',
@@ -44,10 +44,10 @@ async function main() {
 	// --- Regular User ---
 	const userPassword = await bcrypt.hash('user123', 12);
 	const regularUser = await prisma.user.upsert({
-		where: { email: 'user@localhost' },
+		where: { email: 'user@launcher.local' },
 		update: {},
 		create: {
-			email: 'user@localhost',
+			email: 'user@launcher.local',
 			password: userPassword,
 			displayName: 'Demo User',
 			role: 'user',