feat(learner): Better Auth sessions, owner bootstrap, claim groups; server takes feature factories

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/feature-learner/src/server/feature.ts

@@ -0,0 +1,25 @@
+import type { AuthService, Feature, ServerContext } from "@stc/contracts";
+import { createAuth } from "./auth";
+import { runMigrations } from "./migrate";
+import { json } from "./http";
+
+/**
+ * The learner feature: auth, library, reader, notes, progress and exercises.
+ * Returns the routes plus the `AuthService` that replaces the server's anonymous one.
+ */
+export function learnerFeature(ctx: ServerContext): Feature & { auth: AuthService } {
+  const ready = runMigrations(ctx.db);
+  ready.catch((e) => console.error("[learner] migrations failed", e));
+  const auth = createAuth(ctx, ready);
+  const routes: Feature["routes"] = {
+    "/api/auth/*": {
+      GET: (req, rc) => auth.handler(req, rc.user),
+      POST: (req, rc) => auth.handler(req, rc.user),
+    },
+    "/api/me": { GET: async (_req, rc) => json({ user: rc.user }) },
+    "/api/learner/providers": {
+      GET: async () => json({ emailPassword: true, providers: auth.providers(), sso: await auth.hasSso() }),
+    },
+  };
+  return { name: "learner", routes, auth: auth.service };
+}