fix: recover server-confirmed Today breaks (Closes #1274)

frontend/today-session-sync.js

@@ -1,5 +1,6 @@
 function createTodaySessionSync({
   fetchJson, getDeviceId, timer, onRemote = () => {}, onTransferred = () => {}, onStatus = () => {},
+  onOwnedRestore = () => {},
   setInterval = globalThis.setInterval, clearInterval = globalThis.clearInterval,
 }) {
   let current = null;
@@ -25,6 +26,8 @@ function createTodaySessionSync({
     current = session;
     if (session.device_id === deviceId()) {
       ownedRevision = session.revision;
+      if (Number.isFinite(session.break_deadline_at) &&
+          timer?.restoreBreak?.(session.identity, session.break_deadline_at)) onOwnedRestore(session);
       onRemote(null);
     } else if ((session.running || Number.isFinite(session.break_deadline_at)) && session.identity) {
       if (previousOwned) {
@@ -186,6 +189,7 @@ function attachTodaySessionHandoff({
   };
   const sync = createTodaySessionSync({
     fetchJson, getDeviceId, timer,
+    onOwnedRestore:renderTimer,
     onStatus:state => showSessionStatus(
       state === 'syncing' ? 'Session syncing…' :
         (state === 'offline' ? 'Session offline · will retry.' : '')

frontend/today-timer.js

@@ -159,6 +159,15 @@ function createTodayTimer({ storage, getLogin, now = () => Date.now(), onChange
       state.timed_break = { identity, deadline_at:now() + duration * 60000 };
       return write(state) ? validBreak(state) : false;
     },
+    restoreBreak(identity, deadlineAt) {
+      const deadline = Number(deadlineAt);
+      if (typeof identity !== 'string' || !identity || !Number.isFinite(deadline) || deadline <= now()) return false;
+      const state = read();
+      const entry = state.entries[identity];
+      if (state.active_identity !== identity || !entry || entry.running || validBreak(state)) return false;
+      state.timed_break = { identity, deadline_at:Math.floor(deadline) };
+      return write(state);
+    },
     breakSnapshot() {
       return validBreak(read());
     },