Unify the dashboard experience and retire the multi-theme engine so onboarding and day-to-day invoicing feel consistent and easier to maintain.

Shared layout, tabs, and sidebar timer; user onboarding and registration polish; settings danger zone and data export; chart and tRPC perf fixes; migrations for onboarding and dropped appearance columns.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/server/api/trpc.ts

@@ -133,18 +133,13 @@ export const createTRPCRouter = t.router;
  */
 const timingMiddleware = t.middleware(async ({ next, path }) => {
   const start = Date.now();
+  const result = await next();
+  const end = Date.now();
 
   if (t._config.isDev) {
-    // artificial delay in dev
-    const waitMs = Math.floor(Math.random() * 400) + 100;
-    await new Promise((resolve) => setTimeout(resolve, waitMs));
+    console.log(`[TRPC] ${path} took ${end - start}ms to execute`);
   }
 
-  const result = await next();
-
-  const end = Date.now();
-  console.log(`[TRPC] ${path} took ${end - start}ms to execute`);
-
   return result;
 });