Initial commit: Inner OS v1

Full-stack inner development operating system built on Next.js 16 + Prisma 7 + PostgreSQL + OpenAI + Clerk.
Generates personalized daily mental training tasks, collects reflection, updates user state, and provides internal reward feedback.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/StageBadge.tsx

@@ -0,0 +1,20 @@
+const stageLabels: Record<number, { label: string; color: string }> = {
+  0: { label: "Beginner", color: "text-muted bg-stone" },
+  1: { label: "Foundation", color: "text-amber bg-amber/10" },
+  2: { label: "Growing", color: "text-sage bg-sage/10" },
+  3: { label: "Established", color: "text-info bg-info/10" },
+  4: { label: "Advanced", color: "text-ink bg-amber/15" },
+};
+
+export default function StageBadge({ stage }: { stage: number }) {
+  const info = stageLabels[stage] ?? stageLabels[0];
+
+  return (
+    <span
+      className={`inline-flex items-center gap-1 px-2.5 py-0.5 rounded-full text-xs font-medium ${info.color}`}
+    >
+      <span className="w-1.5 h-1.5 rounded-full bg-current opacity-60" />
+      {info.label}
+    </span>
+  );
+}