fix: clear resolveFailed on retry so the FAB recovers

resolveAgents() throwing once (e.g. tenant id not ready on the first
render) latched resolveFailed=true, and nothing ever cleared it — so
the FAB stayed hidden permanently even after a later retry succeeded.
Reset the flag at the start of each resolution attempt.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/index.tsx

@@ -126,6 +126,10 @@ export function AgentDock({
 
   useEffect(() => {
     let cancelled = false
+    // Clear any prior failure so a retry (e.g. tenant id arrives after
+    // the first render) gets a clean slate — otherwise the flag latches
+    // and the FAB stays hidden forever even once resolution succeeds.
+    setResolveFailed(false)
     resolveAgents()
       .then((list) => {
         if (cancelled) return