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

tests/test_today_session_sync.py

@@ -4,6 +4,7 @@ from pathlib import Path
 
 
 SOURCE = Path(__file__).parents[1] / "frontend" / "today-session-sync.js"
+TIMER = Path(__file__).parents[1] / "frontend" / "today-timer.js"
 
 
 def run_node(script: str) -> dict:
@@ -92,6 +93,43 @@ const sync=createTodaySessionSync({
     assert result["claimed"]["device_id"] == "desktop-b"
 
 
+def test_owner_refresh_recovers_a_server_confirmed_break_missing_from_device_state():
+    result = run_node(
+        f"""
+const createTimer = require({json.dumps(str(TIMER))});
+const values = new Map();
+const storage = {{
+  getItem:key=>values.get(key)||null,
+  setItem:(key,value)=>values.set(key,value),
+}};
+const timer = createTimer({{storage,getLogin:()=> 'timmy',now:()=>100000}});
+timer.adopt('issue:r:42:', 90000, false);
+let rendered = 0;
+const remote = {{
+  revision:3,device_id:'phone-a',identity:'issue:r:42:',elapsed_ms:90000,
+  running:false,break_deadline_at:400000,updated_at:10,
+}};
+const sync = createTodaySessionSync({{
+  getDeviceId:()=> 'phone-a',fetchJson:async()=>remote,timer,
+  onOwnedRestore:()=>{{rendered += 1;}},
+}});
+(async()=>{{
+  await sync.refresh();
+  process.stdout.write(JSON.stringify({{breakSnapshot:timer.breakSnapshot(),rendered}}));
+}})().catch(error=>{{console.error(error);process.exit(1);}});
+"""
+    )
+
+    assert result == {
+        "breakSnapshot": {
+            "identity": "issue:r:42:",
+            "deadline_at": 400_000,
+            "expired": False,
+        },
+        "rendered": 1,
+    }
+
+
 def test_break_handoff_summary_is_actionable_and_privacy_safe():
     result = run_node(
         r"""