update ui and other frontend updates

frontend/src/routes/signup/+page.server.ts

@@ -0,0 +1,35 @@
+import { fail, redirect } from '@sveltejs/kit';
+import { signup, setSessionCookie, setPbTokenCookie } from '$lib/server/auth';
+
+export const actions = {
+	default: async (event) => {
+		const fd = await event.request.formData();
+		const email = fd.get('email') as string;
+		const password = fd.get('password') as string;
+		const famName = fd.get('famName') as string;
+		const parentName = fd.get('parentName') as string;
+
+		if (!email || !password || !famName) {
+			return fail(400, { error: 'All fields required', email, famName });
+		}
+		if (password.length < 8) {
+			return fail(400, { error: 'Password must be at least 8 characters', email, famName });
+		}
+
+		try {
+			const result = await signup(email, password, famName, parentName || email.split('@')[0]);
+			setSessionCookie(event, {
+				famId: result.famId,
+				userId: result.userId,
+				famSlug: result.famSlug,
+				memberName: result.memberName,
+				role: result.role,
+			});
+			setPbTokenCookie(event, result.token);
+			throw redirect(303, `/${result.famSlug}/${result.memberName}`);
+		} catch (e) {
+			if (e instanceof redirect) throw e;
+			return fail(400, { error: e instanceof Error ? e.message : 'Signup failed', email, famName });
+		}
+	},
+};