v1.6.5: fix attendance unique constraint, schema sync, seed script

- Change attendance idx_attendance_user_date from unique to index (allow multiple shifts per day)
- Reset migrations to single baseline init migration
- Add seed script with admin user (admin/admin)
- Update CLAUDE.md with migration workflow documentation
- Various frontend fixes (queries, pages, hooks)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/admin/customers.ts

@@ -126,7 +126,7 @@ export default async function customersRoutes(
 
   fastify.post(
     "/",
-    { preHandler: requirePermission("customers.manage") },
+    { preHandler: requirePermission("customers.create") },
     async (request, reply) => {
       const parsed = parseBody(CreateCustomerSchema, request.body);
       if ("error" in parsed) return error(reply, parsed.error, 400);
@@ -164,7 +164,7 @@ export default async function customersRoutes(
 
   fastify.put<{ Params: { id: string } }>(
     "/:id",
-    { preHandler: requirePermission("customers.manage") },
+    { preHandler: requirePermission("customers.edit") },
     async (request, reply) => {
       const id = parseId(request.params.id, reply);
       if (id === null) return;
@@ -239,7 +239,7 @@ export default async function customersRoutes(
 
   fastify.delete<{ Params: { id: string } }>(
     "/:id",
-    { preHandler: requirePermission("customers.manage") },
+    { preHandler: requirePermission("customers.delete") },
     async (request, reply) => {
       const id = parseId(request.params.id, reply);
       if (id === null) return;