fix(console-noise): pre-warm via auth.getSession + demote stuck crypto-migration logs to debug

apps/desktop/src/context/AuthContext.tsx

@@ -207,9 +207,14 @@ export function AuthProvider({ children }: { children: ReactNode }) {
   // Pre-warm Supabase: fires the first round-trip in the background so the
   // first user-triggered query (e.g. loading conversations) doesn't pay
   // the cold-connection latency.
+  //
+  // Uses auth.getSession() instead of a `profiles` SELECT because the
+  // SELECT race-fired before the supabase client committed its JWT to
+  // request headers, causing a 400 from PostgREST on app boot. Auth
+  // endpoints don't depend on RLS and tolerate the race.
   useEffect(() => {
     if (!session) return;
-    void supabase.from('profiles').select('id').limit(1).then(() => undefined);
+    void supabase.auth.getSession();
   }, [session]);
 
   // Phase 3: ensure this install owns exactly one devices row. The row is

apps/desktop/src/lib/userIdentity.ts

@@ -213,7 +213,7 @@ async function runLegacyMigration(
     }
   }
 
-  console.info(
+  console.debug(
     '[crypto-migration] vault scan:',
     'serverDevices=' + report.serverDevices,
     'keysFromServerList=' + report.strongholdKeysFromServerDevices,