big boy webui new new new new new 100 files changed 80 years

webui/src/hooks/useCanControlRover.js

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+// Rover Control Availability
+// Purpose: Mirrors the server turnService.canDrive rule for immediate, consistent UI disabling.
+import { useSessionSelector } from '../context/SessionContext.jsx';
+
+export function selectCanControlRover(state, roverId) {
+  const session = state.session;
+  if (!roverId || session?.role === 'spectator') return false;
+  if (session?.mode !== 'turns') return true;
+
+  const turnInfo = session?.turnQueues?.[roverId] || null;
+  const queue = Array.isArray(turnInfo?.queue) ? turnInfo.queue : [];
+
+  /* The server permits control when a turns queue is absent or contains at most
+     one driver. Only a genuinely shared queue requires the active socket id.
+     Keeping this exact ordering prevents initial session loading from disabling
+     an otherwise uncontested rover. The server remains the final authority. */
+  if (queue.length <= 1) return true;
+  /* activeDrivers is the server's direct ownership map and can arrive before
+     the richer queue snapshot during an initial load or reconnect. The queue
+     field remains a compatibility fallback for intermediate payloads. */
+  const activeDriverId = session?.activeDrivers?.[roverId] || turnInfo?.current || null;
+  return Boolean(session?.socketId && activeDriverId === session.socketId);
+}
+
+export default function useCanControlRover(roverId) {
+  return useSessionSelector((state) => selectCanControlRover(state, roverId));
+}