chore: establish Strategy Lab source baseline (development, not release)

1 files changed, 45 insertions, 0 deletions

diff --git a/frontend/src/lib/session.svelte.ts b/frontend/src/lib/session.svelte.ts
new file mode 100644
index 0000000..47b452f
--- /dev/null
+++ b/frontend/src/lib/session.svelte.ts
@@ -0,0 +1,45 @@
+import type { User } from './types';
+import { getMe } from './client';
+
+class SessionStore {
+  me = $state<User | null>(null);
+  status = $state<'loading' | 'anon' | 'authed'>('loading');
+
+  async refresh(): Promise<User | null> {
+    try {
+      const { user } = await getMe();
+      if (!user || typeof user.id !== 'string' || user.id.length === 0) {
+        this.clear();
+        return null;
+      }
+      this.me = user;
+      this.status = 'authed';
+      return user;
+    } catch (e) {
+      const status = (e as { status?: number }).status ?? 0;
+      if (status === 0) {
+        // network/protocol error: keep previous state so UI can show retry instead
+        if (this.status === 'loading') this.clear();
+        return null;
+      }
+      this.clear();
+      return null;
+    }
+  }
+
+  clear() {
+    this.me = null;
+    this.status = 'anon';
+  }
+
+  set(u: User | null) {
+    if (u && typeof u.id === 'string' && u.id.length > 0) {
+      this.me = u;
+      this.status = 'authed';
+    } else {
+      this.clear();
+    }
+  }
+}
+
+export const session: SessionStore = new SessionStore();