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/lib/db-errors.ts

@@ -0,0 +1,44 @@
+const DATABASE_SETUP_HINT =
+  "Database not ready — run `bun db:migrate` (or `bun db:push` for local dev) after starting Postgres.";
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null;
+}
+
+function collectErrorParts(error: unknown): string[] {
+  const parts: string[] = [];
+  const seen = new Set<unknown>();
+  let current: unknown = error;
+
+  while (current && isRecord(current) && !seen.has(current)) {
+    seen.add(current);
+
+    if (typeof current.message === "string") {
+      parts.push(current.message);
+    }
+
+    if (typeof current.code === "string") {
+      parts.push(current.code);
+    }
+
+    current = current.cause;
+  }
+
+  return parts;
+}
+
+export function getDatabaseSetupErrorMessage(error: unknown): string | null {
+  const haystack = collectErrorParts(error).join(" ").toLowerCase();
+
+  if (
+    haystack.includes("does not exist") ||
+    haystack.includes("42p01") ||
+    haystack.includes("econnrefused") ||
+    haystack.includes("connection refused") ||
+    haystack.includes("connect econnrefused")
+  ) {
+    return DATABASE_SETUP_HINT;
+  }
+
+  return null;
+}