fix: recover valid Today edits from corrupt queue

Closes #1042

tests/e2e/test_mobile_today_handoff_release.py

@@ -159,6 +159,26 @@ def test_release_artifact_plans_hands_off_and_opens_next_mobile_issue(tmp_path:
 
             today = page.evaluate("JSON.parse(localStorage.getItem('stackchain.today-work.v1.timmy') || '[]')")
             assert today == ["issue:acme/mobile:41:", "issue:acme/mobile:42:"]
+
+            page.evaluate("""() => {
+              const prefix = 'stackchain.today-sync.v1.timmy.operation.';
+              const snapshot = JSON.parse(localStorage.getItem('stackchain.today-sync-snapshot.v1.timmy') || '{}');
+              localStorage.setItem(prefix + 'broken', '{not-json');
+              localStorage.setItem(prefix + 'recover-remove', JSON.stringify({
+                queued_at: Date.now(),
+                operation: {
+                  operation_id: 'recover-remove', action: 'remove',
+                  item_id: 'issue:acme/mobile:42:', direction: null, base_revision: snapshot.revision,
+                },
+              }));
+            }""")
+            page.reload(wait_until="networkidle")
+            expect(page.locator("#today-sync-status")).to_have_text(
+                "Recovered 1 Today edit · discarded 1 unreadable device record."
+            )
+            assert page.evaluate("""() => !Object.keys(localStorage).some(
+              key => key.startsWith('stackchain.today-sync.v1.timmy.operation.')
+            )""")
             assert page.evaluate("document.documentElement.scrollWidth <= window.innerWidth")
             assert browser_errors == []
             assert failed_responses == []