feat: make Following a changed-first inbox (Closes #1297)

frontend/dashboard.css

@@ -1092,6 +1092,8 @@ textarea { resize: vertical; min-height: 120px; }
 .following-list { display:grid; gap:8px; min-width:0; max-height:70dvh; overflow:auto; }
 .following-card { box-sizing:border-box; display:flex; align-items:center; justify-content:space-between; gap:12px; width:100%; min-width:0; min-height:52px; padding:10px 12px; text-align:left; }
 .following-card span:first-child { min-width:0; display:grid; gap:3px; }
+.following-card em { color:var(--accent); font-size:.75rem; font-style:normal; font-weight:700; text-transform:uppercase; letter-spacing:.04em; }
+.following-card.has-unseen-change { border-color:var(--accent); }
 .following-card strong, .following-card small { overflow-wrap:anywhere; }
 .markdown-content { min-width:0; max-width:100%; overflow-wrap:anywhere; white-space:normal; }
 .markdown-content > :first-child { margin-top:0; }

frontend/following.js

@@ -14,9 +14,12 @@
 
     function publish(status, error) {
       const state = {status, revision:snapshot.revision, items:[...snapshot.items]};
+      state.degraded = snapshot.degraded === true;
+      state.refreshFailures = Number(snapshot.refreshFailures) || 0;
       if (error) state.error = error;
       options.render?.(state);
-      if (status === 'ready') options.onCount?.(snapshot.items.length);
+      if (status === 'ready') options.onCount?.(
+        snapshot.items.filter(item => item.has_unseen_change === true).length);
       return state;
     }
 
@@ -29,6 +32,8 @@
         snapshot = {
           revision:Number(result?.revision) || 0,
           items:Array.isArray(result?.items) ? result.items.slice(0, 50) : [],
+          degraded:result?.degraded === true,
+          refreshFailures:Number(result?.refresh_failures) || 0,
         };
         publish('ready');
         return snapshot;
@@ -38,10 +43,15 @@
       }
     }
 
-    function open(index) {
+    async function open(index) {
       const item = snapshot.items[Number(index)];
       if (!item) return false;
-      Promise.resolve(options.onOpen?.({...item, kind:'issue'})).catch(() => {});
+      await options.onOpen?.({...item, kind:'issue'});
+      if (item.has_unseen_change === true && typeof options.onAcknowledge === 'function') {
+        await options.onAcknowledge(item);
+        item.has_unseen_change = false;
+        publish('ready');
+      }
       return true;
     }
 
@@ -67,17 +77,19 @@
       query('#retry-following').hidden = state.status !== 'error';
       if (state.status === 'loading') return void (status.textContent = 'Loading watched issues…');
       if (state.status === 'error') return void (status.textContent = state.error?.message || 'Following is temporarily unavailable.');
-      status.textContent = state.items.length
+      status.textContent = (state.degraded ? 'Some watched issues could not be refreshed. Showing last known details. ' : '') + (state.items.length
         ? state.items.length + (state.items.length === 1 ? ' watched issue.' : ' watched issues.')
-        : 'No watched issues yet. Watch one from Search to keep it here.';
+        : 'No watched issues yet. Watch one from Search to keep it here.');
       list.innerHTML = state.items.map((item, index) =>
-        '<button class="following-card" type="button" data-following-index="' + index + '"><span><strong>' +
+        '<button class="following-card' + (item.has_unseen_change ? ' has-unseen-change' : '') +
+        '" type="button" data-following-index="' + index + '"><span>' +
+        (item.has_unseen_change ? '<em>New activity</em>' : '') + '<strong>' +
         escapeHtml(item.title) + '</strong><small>' + escapeHtml(item.repository + ' #' + item.number +
         ' · ' + item.state + ' · ' + formatTime(item.updated_at)) +
         '</small></span><span aria-hidden="true">›</span></button>').join('');
       list.querySelectorAll('[data-following-index]').forEach(button => button.addEventListener('click', () => {
         query('#following-sheet').close();
-        feature.open(Number(button.dataset.followingIndex));
+        feature.open(Number(button.dataset.followingIndex)).catch(() => {});
       }));
     }
     feature = createFollowing({
@@ -86,9 +98,17 @@
         const value = query('[data-mobile-queue-count="following"]');
         value.textContent = count;
         value.closest('button').setAttribute('aria-label', 'Following, ' + count +
-          (count === 1 ? ' watched issue' : ' watched issues'));
+          (count === 1 ? ' unseen change' : ' unseen changes'));
       },
       onOpen,
+      onAcknowledge:item => {
+        const [owner, repo] = item.repository.split('/');
+        return fetchJson('api/v1/following/' + encodeURIComponent(owner) + '/' +
+          encodeURIComponent(repo) + '/issues/' + item.number + '/seen', {
+            method:'PUT', headers:{'Content-Type':'application/json', Accept:'application/json'},
+            body:JSON.stringify({updated_at:item.updated_at}),
+          });
+      },
     });
     query('#close-following').addEventListener('click', () => query('#following-sheet').close());
     query('#retry-following').addEventListener('click', () => feature.load().catch(() => {}));

src/following_store.py

@@ -86,6 +86,13 @@ class FollowingStore:
         url = raw.get("url")
         if not isinstance(url, str) or not url.startswith(("http://", "https://")) or len(url) > 2048:
             raise ValueError("url is invalid")
+        last_seen_updated_at = raw.get("last_seen_updated_at", updated_at)
+        if (
+            not isinstance(last_seen_updated_at, str)
+            or not last_seen_updated_at
+            or len(last_seen_updated_at) > 64
+        ):
+            raise ValueError("last seen update is invalid")
         return {
             "repository": repository,
             "number": number,
@@ -93,8 +100,22 @@ class FollowingStore:
             "state": state,
             "updated_at": updated_at,
             "url": url,
+            "last_seen_updated_at": last_seen_updated_at,
         }
 
+    @classmethod
+    def _present(cls, snapshot: dict) -> dict:
+        changed = []
+        unchanged = []
+        for raw in snapshot["items"]:
+            stored = cls._normalize_item(raw)
+            unseen = stored["updated_at"] != stored["last_seen_updated_at"]
+            item = {key: value for key, value in stored.items() if key != "last_seen_updated_at"}
+            item["has_unseen_change"] = unseen
+            (changed if unseen else unchanged).append(item)
+        changed.sort(key=lambda item: item["updated_at"], reverse=True)
+        return {"revision": snapshot["revision"], "items": changed + unchanged}
+
     @staticmethod
     def _identity(item: dict) -> tuple[str, int]:
         return item["repository"].lower(), item["number"]
@@ -106,12 +127,13 @@ class FollowingStore:
                 "SELECT revision, items FROM following_issues WHERE login = ?", (login,)
             ).fetchone()
             snapshot, legacy = self._snapshot(row, login)
+            snapshot["items"] = [self._normalize_item(item) for item in snapshot["items"]]
             if row is not None and legacy:
                 connection.execute(
                     "UPDATE following_issues SET items = ? WHERE login = ? AND items = ?",
                     (self._seal(login, snapshot["items"]), login, row[1]),
                 )
-        return snapshot
+        return self._present(snapshot)
 
     def preflight(self, login: str, raw_item: dict, watching: bool) -> dict:
         """Validate a requested change and capacity without mutating the registry."""
@@ -146,7 +168,7 @@ class FollowingStore:
                 "SELECT revision, items FROM following_issues WHERE login = ?", (login,)
             ).fetchone()
             current, _legacy = self._snapshot(row, login)
-            items = list(current["items"])
+            items = [self._normalize_item(candidate) for candidate in current["items"]]
             index = next(
                 (position for position, candidate in enumerate(items)
                  if self._identity(candidate) == identity),
@@ -157,13 +179,14 @@ class FollowingStore:
                     if len(items) >= self.limit:
                         raise ValueError(f"following is limited to {self.limit} issues")
                     items.insert(0, item)
-                elif items[index] == item:
-                    return current
                 else:
+                    item["last_seen_updated_at"] = items[index]["last_seen_updated_at"]
+                    if items[index] == item:
+                        return self._present({"revision": current["revision"], "items": items})
                     items.pop(index)
                     items.insert(0, item)
             elif index is None:
-                return current
+                return self._present({"revision": current["revision"], "items": items})
             else:
                 items.pop(index)
             revision = current["revision"] + 1
@@ -172,4 +195,58 @@ class FollowingStore:
                 "ON CONFLICT(login) DO UPDATE SET revision=excluded.revision, items=excluded.items",
                 (login, revision, self._seal(login, items)),
             )
-        return {"revision": revision, "items": items}
+        return self._present({"revision": revision, "items": items})
+
+    def refresh(self, login: str, raw_items: list[dict]) -> dict:
+        """Merge successful upstream snapshots while preserving seen revisions."""
+        login = self._login(login)
+        fresh = {self._identity(item): self._normalize_item(item) for item in raw_items}
+        with self._connect() as connection:
+            connection.execute("BEGIN IMMEDIATE")
+            row = connection.execute(
+                "SELECT revision, items FROM following_issues WHERE login = ?", (login,)
+            ).fetchone()
+            current, _legacy = self._snapshot(row, login)
+            items = [self._normalize_item(candidate) for candidate in current["items"]]
+            changed = False
+            for index, item in enumerate(items):
+                update = fresh.get(self._identity(item))
+                if update is None:
+                    continue
+                update["last_seen_updated_at"] = item["last_seen_updated_at"]
+                if update != item:
+                    items[index] = update
+                    changed = True
+            revision = current["revision"]
+            if changed:
+                revision += 1
+                connection.execute(
+                    "UPDATE following_issues SET revision = ?, items = ? WHERE login = ?",
+                    (revision, self._seal(login, items), login),
+                )
+        return self._present({"revision": revision, "items": items})
+
+    def acknowledge(self, login: str, repository: str, number: int, updated_at: str) -> dict:
+        """Mark only the exact upstream revision successfully opened by the operator."""
+        login = self._login(login)
+        identity = (str(repository).lower(), number)
+        with self._connect() as connection:
+            connection.execute("BEGIN IMMEDIATE")
+            row = connection.execute(
+                "SELECT revision, items FROM following_issues WHERE login = ?", (login,)
+            ).fetchone()
+            current, _legacy = self._snapshot(row, login)
+            items = [self._normalize_item(candidate) for candidate in current["items"]]
+            revision = current["revision"]
+            for item in items:
+                if self._identity(item) != identity or item["updated_at"] != updated_at:
+                    continue
+                if item["last_seen_updated_at"] != updated_at:
+                    item["last_seen_updated_at"] = updated_at
+                    revision += 1
+                    connection.execute(
+                        "UPDATE following_issues SET revision = ?, items = ? WHERE login = ?",
+                        (revision, self._seal(login, items), login),
+                    )
+                break
+        return self._present({"revision": revision, "items": items})

src/main.py

@@ -2564,6 +2564,10 @@ def _following_store() -> FollowingStore:
     )
 
 
+class FollowingSeenRevision(BaseModel):
+    updated_at: str = Field(min_length=1, max_length=64)
+
+
 def _completed_filed_review_store() -> CompletedFiledReviewStore:
     return CompletedFiledReviewStore(
         os.getenv(
@@ -2611,8 +2615,33 @@ async def _confirmed_login() -> str:
 @app.get("/api/v1/following")
 async def get_following(response: Response):
     login = await _confirmed_login()
+    store = _following_store()
     try:
-        snapshot = await asyncio.to_thread(_following_store().get, login)
+        snapshot = await asyncio.to_thread(store.get, login)
+        semaphore = asyncio.Semaphore(5)
+
+        async def refresh_item(item: dict) -> dict:
+            async with semaphore:
+                preview = await asyncio.wait_for(
+                    gitea_proxy.work_preview(item["repository"], "issue", item["number"]),
+                    timeout=GLOBAL_SEARCH_TIMEOUT_SECONDS,
+                )
+            return store._normalize_item({
+                "repository": item["repository"],
+                "number": item["number"],
+                "title": preview.get("title", ""),
+                "state": preview.get("state", ""),
+                "updated_at": preview.get("updated_at", ""),
+                "url": preview.get("url", ""),
+            })
+
+        results = await asyncio.gather(
+            *(refresh_item(item) for item in snapshot["items"]),
+            return_exceptions=True,
+        )
+        refreshed = [result for result in results if isinstance(result, dict)]
+        failures = len(results) - len(refreshed)
+        snapshot = await asyncio.to_thread(store.refresh, login, refreshed)
     except (OSError, sqlite3.Error, PrivateStateEncryptionError):
         raise HTTPException(
             status_code=503,
@@ -2620,7 +2649,33 @@ async def get_following(response: Response):
             headers={"Retry-After": "1"},
         )
     response.headers["Cache-Control"] = "no-store"
-    return snapshot
+    return {**snapshot, "degraded": failures > 0, "refresh_failures": failures}
+
+
+@app.put("/api/v1/following/{owner}/{repo}/issues/{number}/seen")
+async def acknowledge_following_revision(
+    payload: FollowingSeenRevision,
+    owner: str,
+    repo: str,
+    number: int = PathParam(gt=0),
+):
+    login = await _confirmed_login()
+    try:
+        return await asyncio.to_thread(
+            _following_store().acknowledge,
+            login,
+            f"{owner}/{repo}",
+            number,
+            payload.updated_at,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=422, detail=str(exc)) from exc
+    except (OSError, sqlite3.Error, PrivateStateEncryptionError):
+        raise HTTPException(
+            status_code=503,
+            detail="Following synchronization is unavailable",
+            headers={"Retry-After": "1"},
+        )
 
 
 @app.get("/api/v1/completed-filed-reviews")

tests/e2e/test_mobile_following_release.py

@@ -23,12 +23,13 @@ def test_following_queue_is_phone_usable_at_narrow_viewport():
         row = page.locator('[data-mobile-queue="following"]')
         expect(row).to_have_count(1)
         page.locator("#following-list").evaluate("""node => {
-          node.innerHTML = '<button class="following-card" type="button"><span><strong>Quiet issue with a long mobile title</strong><small>stackchain/api #42 · open · just now</small></span><span aria-hidden="true">›</span></button>';
+          node.innerHTML = '<button class="following-card has-unseen-change" type="button"><span><em>New activity</em><strong>Changed issue with a long mobile title</strong><small>stackchain/api #42 · open · just now</small></span><span aria-hidden="true">›</span></button>';
         }""")
         page.locator("#following-sheet").evaluate("node => node.showModal()")
 
         expect(page.locator("#following-sheet")).to_be_visible()
         expect(page.locator(".following-card")).to_be_visible()
+        expect(page.locator(".following-card")).to_contain_text("New activity")
         assert page.locator(".following-card").bounding_box()["height"] >= 44
         assert page.locator("#close-following").bounding_box()["height"] >= 44
         overflow = page.evaluate("document.documentElement.scrollWidth > document.documentElement.clientWidth")

tests/test_following_api.py

@@ -50,13 +50,14 @@ async def test_confirmed_watch_updates_account_following_collection(monkeypatch,
     }
     assert following.status_code == 200
     assert following.headers["cache-control"] == "no-store"
-    assert following.json() == {"revision": 1, "items": [{
+    assert following.json() == {"revision": 1, "degraded": False, "refresh_failures": 0, "items": [{
         "repository": "stackchain/api",
         "number": 42,
         "title": "Make mobile review useful",
         "state": "open",
         "updated_at": "2026-08-23T03:00:00Z",
         "url": "https://forge.example/stackchain/api/issues/42",
+        "has_unseen_change": False,
     }]}
 
 
@@ -180,3 +181,71 @@ async def test_uncompensated_following_write_reports_authoritative_partial_outco
         "error": "Watching in Gitea, but Following could not sync. Retry this action.",
     }
     assert calls == [True, False]
+
+
+@pytest.mark.anyio
+async def test_following_refreshes_changed_items_and_preserves_failed_items(monkeypatch, tmp_path):
+    store = FollowingStore(tmp_path / "following.sqlite3", encryption_key=b"e" * 32)
+    first = {
+        "repository": "stackchain/api", "number": 42, "title": "Old title",
+        "state": "open", "updated_at": "2026-08-23T03:00:00Z",
+        "url": "https://forge.example/stackchain/api/issues/42",
+    }
+    failed = {**first, "number": 43, "title": "Last known",
+              "url": "https://forge.example/stackchain/api/issues/43"}
+    store.set_watching("timmy", failed, True)
+    store.set_watching("timmy", first, True)
+
+    async def preview(repository, kind, number):
+        assert (repository, kind) == ("stackchain/api", "issue")
+        if number == 43:
+            return {**failed, "kind": "issue", "title": ""}
+        return {**first, "kind": "issue", "title": "Fresh title", "state": "closed",
+                "updated_at": "2026-08-23T04:00:00Z"}
+
+    async def user():
+        return {"login": "timmy"}
+
+    monkeypatch.setattr(main, "_following_store", lambda: store)
+    monkeypatch.setattr(main.gitea_proxy, "work_preview", preview)
+    monkeypatch.setattr(main, "current_user", user)
+    transport = httpx.ASGITransport(app=main.app)
+    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+        response = await client.get("/api/v1/following")
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert payload["degraded"] is True
+    assert payload["refresh_failures"] == 1
+    assert [(item["number"], item["has_unseen_change"]) for item in payload["items"]] == [
+        (42, True), (43, False)
+    ]
+    assert payload["items"][0]["title"] == "Fresh title"
+    assert payload["items"][1]["title"] == "Last known"
+
+
+@pytest.mark.anyio
+async def test_following_acknowledges_only_the_exact_loaded_revision(monkeypatch, tmp_path):
+    store = FollowingStore(tmp_path / "following.sqlite3", encryption_key=b"f" * 32)
+    item = {
+        "repository": "stackchain/api", "number": 42, "title": "Changed",
+        "state": "open", "updated_at": "2026-08-23T03:00:00Z",
+        "url": "https://forge.example/stackchain/api/issues/42",
+    }
+    store.set_watching("timmy", item, True)
+    store.refresh("timmy", [{**item, "updated_at": "2026-08-23T04:00:00Z"}])
+
+    async def user():
+        return {"login": "timmy"}
+
+    monkeypatch.setattr(main, "_following_store", lambda: store)
+    monkeypatch.setattr(main, "current_user", user)
+    transport = httpx.ASGITransport(app=main.app)
+    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+        response = await client.put(
+            "/api/v1/following/stackchain/api/issues/42/seen",
+            json={"updated_at": "2026-08-23T04:00:00Z"},
+        )
+
+    assert response.status_code == 200
+    assert response.json()["items"][0]["has_unseen_change"] is False

tests/test_following_frontend.py

@@ -14,7 +14,7 @@ const state = {{ renders:[], counts:[], opened:[], requests:[] }};
 const feature = createFollowing({{
   fetchJson: async path => {{
     state.requests.push(path);
-    return {{revision:3,items:[{{repository:'stackchain/api',number:42,title:'Quiet issue',state:'open',updated_at:'2026-08-23T03:00:00Z',url:'https://forge.example/issue/42'}}]}};
+    return {{revision:3,items:[{{repository:'stackchain/api',number:42,title:'Quiet issue',state:'open',updated_at:'2026-08-23T03:00:00Z',url:'https://forge.example/issue/42',has_unseen_change:false}}]}};
   }},
   render: snapshot => state.renders.push(snapshot),
   onCount: count => state.counts.push(count),
@@ -34,7 +34,7 @@ process.stdout.write(JSON.stringify(state));
 """)
 
     assert result["requests"] == ["api/v1/following"]
-    assert result["counts"] == [1]
+    assert result["counts"] == [0]
     assert result["renders"][-1]["status"] == "ready"
     assert result["renders"][-1]["items"][0]["title"] == "Quiet issue"
     assert result["opened"] == [{
@@ -44,6 +44,7 @@ process.stdout.write(JSON.stringify(state));
         "state": "open",
         "updated_at": "2026-08-23T03:00:00Z",
         "url": "https://forge.example/issue/42",
+        "has_unseen_change": False,
         "kind": "issue",
     }]
 
@@ -69,3 +70,38 @@ process.stdout.write(JSON.stringify({{opened:feature.open('following'),recommend
         "recommended": {"name": "find", "count": 0, "label": "Find Work"},
         "calls": ["following"],
     }
+
+
+def test_following_counts_unseen_changes_and_acknowledges_after_preview_loads():
+    script = f"""
+const createFollowing = require({json.dumps(str(MODULE))});
+const state = {{counts:[], opened:[], acknowledged:[], renders:[]}};
+let finishPreview;
+const feature = createFollowing({{
+  fetchJson:async () => ({{revision:4,items:[
+    {{repository:'stackchain/api',number:42,title:'Changed',state:'open',updated_at:'2026-08-23T04:00:00Z',url:'https://forge/42',has_unseen_change:true}},
+    {{repository:'stackchain/api',number:43,title:'Quiet',state:'open',updated_at:'2026-08-23T03:00:00Z',url:'https://forge/43',has_unseen_change:false}}
+  ]}}),
+  render:value => state.renders.push(value),
+  onCount:value => state.counts.push(value),
+  onOpen:item => new Promise(resolve => {{ finishPreview=() => {{ state.opened.push(item.number); resolve(); }}; }}),
+  onAcknowledge:async item => state.acknowledged.push(item.updated_at),
+}});
+(async () => {{
+  await feature.load();
+  const opening=feature.open(0);
+  await new Promise(resolve => setImmediate(resolve));
+  state.before={{acknowledged:[...state.acknowledged],counts:[...state.counts]}};
+  finishPreview();
+  await opening;
+  process.stdout.write(JSON.stringify(state));
+}})().catch(error => {{ console.error(error); process.exit(1); }});
+"""
+    result = json.loads(subprocess.run(
+        ["node", "-e", script], text=True, capture_output=True, check=True
+    ).stdout)
+    assert result["before"] == {"acknowledged": [], "counts": [1]}
+    assert result["opened"] == [42]
+    assert result["acknowledged"] == ["2026-08-23T04:00:00Z"]
+    assert result["counts"] == [1, 0]
+    assert result["renders"][-1]["items"][0]["has_unseen_change"] is False

tests/test_following_store.py

@@ -21,10 +21,54 @@ def test_confirmed_watch_is_account_scoped_idempotent_and_encrypted(tmp_path):
     first = store.set_watching("Timmy", ITEM, True)
     repeated = store.set_watching("timmy", ITEM, True)
 
-    assert first == repeated == {"revision": 1, "items": [ITEM]}
+    assert first == repeated == {"revision": 1, "items": [{**ITEM, "has_unseen_change": False}]}
     assert store.get("other") == {"revision": 0, "items": []}
     stored = sqlite3.connect(path).execute(
         "SELECT items FROM following_issues WHERE login = ?", ("timmy",)
     ).fetchone()[0]
     assert ITEM["title"] not in stored
     assert ITEM["repository"] not in stored
+
+
+def test_refresh_marks_changed_items_unseen_and_sorts_them_first(tmp_path):
+    store = FollowingStore(tmp_path / "following.sqlite3", encryption_key=KEY)
+    quiet = {**ITEM, "number": 7, "title": "Quiet", "updated_at": "2026-08-23T02:00:00Z"}
+    store.set_watching("timmy", quiet, True)
+    store.set_watching("timmy", ITEM, True)
+
+    snapshot = store.refresh("timmy", [{
+        **quiet, "title": "Changed upstream", "state": "closed",
+        "updated_at": "2026-08-23T04:00:00Z",
+    }])
+
+    assert [(item["number"], item["has_unseen_change"]) for item in snapshot["items"]] == [
+        (7, True), (42, False)
+    ]
+    assert snapshot["items"][0]["title"] == "Changed upstream"
+    assert snapshot["items"][0]["state"] == "closed"
+
+
+def test_acknowledgement_is_revision_conditional_and_later_change_is_unseen(tmp_path):
+    store = FollowingStore(tmp_path / "following.sqlite3", encryption_key=KEY)
+    store.set_watching("timmy", ITEM, True)
+    changed = {**ITEM, "updated_at": "2026-08-23T04:00:00Z"}
+    store.refresh("timmy", [changed])
+
+    stale = store.acknowledge("timmy", ITEM["repository"], ITEM["number"], ITEM["updated_at"])
+    assert stale["items"][0]["has_unseen_change"] is True
+    seen = store.acknowledge("timmy", ITEM["repository"], ITEM["number"], changed["updated_at"])
+    assert seen["items"][0]["has_unseen_change"] is False
+
+    store.refresh("timmy", [{**ITEM, "updated_at": "2026-08-23T05:00:00Z"}])
+    assert store.get("timmy")["items"][0]["has_unseen_change"] is True
+
+
+def test_reconfirmed_watch_does_not_mark_an_unseen_change_as_seen(tmp_path):
+    store = FollowingStore(tmp_path / "following.sqlite3", encryption_key=KEY)
+    store.set_watching("timmy", ITEM, True)
+    changed = {**ITEM, "updated_at": "2026-08-23T04:00:00Z"}
+    store.refresh("timmy", [changed])
+
+    snapshot = store.set_watching("timmy", changed, True)
+
+    assert snapshot["items"][0]["has_unseen_change"] is True