feat(0.31.0): description éditable, pièces jointes d'issues, clic carte fiable

- Tiroir : édition du titre et de la description (PATCH
  forge, journal 'edited', EVENT_TYPES étendu), création
  avec description dépliable.
- Pièces jointes Gitea de bout en bout : client
  list/upload/delete/download (le téléchargement suit
  browser_download_url — l'endpoint asset ne sert que du
  JSON, attrapé au smoke réel), routes proxifiées avec
  CSRF et plafond 25 Mio, UI liste/envoi/suppression ;
  GitHub : supports_attachments=False, message propre.
- Clic carte en délégation d'événement : les écouteurs par
  carte mouraient au premier rafraîchissement live.
- 261 tests verts (7 nouveaux, palier 21) ; cycle réel
  complet validé sur une issue jetable du vrai Gitea
  (création, édition, envoi, téléchargement, suppression).

tests/conftest.py

@@ -187,6 +187,52 @@ class FakeGitea:
             "404", request=request, response=_httpx.Response(404, request=request)
         )
 
+    supports_attachments = True
+
+    async def update_issue(self, owner, repo, number, title=None, body=None):
+        issue = await self.get_issue(owner, repo, number)
+        if title is not None:
+            issue["title"] = title
+        if body is not None:
+            issue["body"] = body
+        return issue
+
+    # Pièces jointes en mémoire : {(repo, numéro): [assets]}
+    @property
+    def _assets(self):
+        return self.__dict__.setdefault("assets_store", {})
+
+    async def list_issue_assets(self, owner, repo, number):
+        return list(self._assets.get((f"{owner}/{repo}", number), []))
+
+    async def upload_issue_asset(
+        self, owner, repo, number, filename, content, content_type="application/octet-stream"
+    ):
+        store = self._assets.setdefault((f"{owner}/{repo}", number), [])
+        asset = {
+            "id": 700 + len(store) + number,
+            "name": filename,
+            "size": len(content),
+            "download_count": 0,
+            "created_at": "2026-10-23T10:00:00Z",
+            "_content": content,
+            "_type": content_type,
+        }
+        store.append(asset)
+        return {k: v for k, v in asset.items() if not k.startswith("_")}
+
+    async def delete_issue_asset(self, owner, repo, number, asset_id):
+        store = self._assets.get((f"{owner}/{repo}", number), [])
+        self._assets[(f"{owner}/{repo}", number)] = [
+            a for a in store if a["id"] != asset_id
+        ]
+
+    async def download_issue_asset(self, owner, repo, number, asset_id):
+        for asset in self._assets.get((f"{owner}/{repo}", number), []):
+            if asset["id"] == asset_id:
+                return asset["_content"], asset["_type"]
+        raise AssertionError("asset introuvable dans le faux")
+
     async def get_issue_comments(self, owner, repo, number):
         return list(self.comments.get((f"{owner}/{repo}", number), []))
 

tests/test_palier21.py

@@ -0,0 +1,134 @@
+"""Palier 21 (0.31.0): description éditable, pièces jointes
+d'issues, clic carte robuste (délégation côté JS)."""
+
+from tests.conftest import csrf_from
+
+
+def test_issue_update_title_and_body(client, fake_gitea):
+    token = csrf_from(client)
+    r = client.post(
+        "/api/issues/Projets/demo/1/update",
+        data={
+            "title": "Tâche un — précisée",
+            "body": "## Contexte\n\nLa description qui manquait.",
+            "csrf_token": token,
+        },
+    )
+    assert r.status_code == 200
+    payload = r.json()
+    assert payload["ok"] is True
+    assert payload["issue"]["body"].startswith("## Contexte")
+    issue = next(
+        i for i in fake_gitea.issues["Projets/demo"] if i["number"] == 1
+    )
+    assert issue["title"] == "Tâche un — précisée"
+    assert "description qui manquait" in issue["body"]
+    # Le journal consigne l'édition.
+    events = client.get("/api/events?repo=Projets/demo").json()["events"]
+    assert any(e["event_type"] == "edited" for e in events)
+
+
+def test_issue_update_rejects_empty_title(client, fake_gitea):
+    token = csrf_from(client)
+    r = client.post(
+        "/api/issues/Projets/demo/1/update",
+        data={"title": "  ", "body": "x", "csrf_token": token},
+    )
+    assert r.status_code == 400
+
+
+def test_issue_detail_includes_assets_support(client, fake_gitea):
+    data = client.get("/api/issues/Projets/demo/1").json()
+    assert data["issue"]["attachments_supported"] is True
+    assert data["issue"]["assets"] == []
+
+
+def test_asset_roundtrip(client, fake_gitea):
+    token = csrf_from(client)
+    r = client.post(
+        "/api/issues/Projets/demo/1/assets",
+        data={"csrf_token": token},
+        files={"attachment": ("notes.txt", b"bonjour kanbante", "text/plain")},
+    )
+    assert r.status_code == 201
+    asset = r.json()["asset"]
+    assert asset["name"] == "notes.txt"
+    assert asset["size"] == len(b"bonjour kanbante")
+
+    # Visible dans le détail.
+    data = client.get("/api/issues/Projets/demo/1").json()
+    assert [a["name"] for a in data["issue"]["assets"]] == ["notes.txt"]
+
+    # Téléchargement proxifié : contenu + disposition.
+    dl = client.get(
+        f"/api/issues/Projets/demo/1/assets/{asset['id']}/download"
+    )
+    assert dl.status_code == 200
+    assert dl.content == b"bonjour kanbante"
+    assert "notes.txt" in dl.headers["content-disposition"]
+
+    # Suppression.
+    token = csrf_from(client)
+    r = client.post(
+        f"/api/issues/Projets/demo/1/assets/{asset['id']}/delete",
+        data={"csrf_token": token},
+    )
+    assert r.status_code == 200
+    data = client.get("/api/issues/Projets/demo/1").json()
+    assert data["issue"]["assets"] == []
+
+
+def test_asset_upload_rejects_empty_and_huge(client, fake_gitea):
+    token = csrf_from(client)
+    r = client.post(
+        "/api/issues/Projets/demo/1/assets",
+        data={"csrf_token": token},
+        files={"attachment": ("vide.txt", b"", "text/plain")},
+    )
+    assert r.status_code == 400
+
+
+def test_board_page_has_editor_and_assets_ui(client, fake_gitea):
+    page = client.get("/board/Projets/demo")
+    assert page.status_code == 200
+    assert 'id="detail-edit-btn"' in page.text
+    assert 'id="detail-edit-form"' in page.text
+    assert 'id="detail-assets"' in page.text
+    assert 'id="asset-form"' in page.text
+    # Création avec description dépliable.
+    assert 'id="new-issue-body"' in page.text
+    assert 'id="new-issue-desc-toggle"' in page.text
+
+
+async def test_gitea_download_follows_browser_download_url():
+    """Gitea renvoie la fiche JSON de l'asset, pas le binaire :
+    le téléchargement doit suivre browser_download_url (réel
+    1.27.3, attrapé au smoke de la 0.31.0)."""
+    import httpx
+
+    from app.gitea_client import GiteaClient
+
+    def handler(request):
+        url = str(request.url)
+        if url.endswith("/assets/42"):
+            return httpx.Response(200, json={
+                "id": 42, "name": "preuve.txt",
+                "browser_download_url": "https://gitea.test/attachments/uuid-1",
+            })
+        if url.endswith("/attachments/uuid-1"):
+            assert request.headers.get("authorization", "").startswith("token ")
+            return httpx.Response(
+                200, content=b"contenu reel",
+                headers={"content-type": "text/plain"},
+            )
+        return httpx.Response(404)
+
+    client = GiteaClient(
+        base_url="https://gitea.test", token="jeton" + "-factice",
+        cache_ttl=0, transport=httpx.MockTransport(handler),
+    )
+    content, content_type = await client.download_issue_asset(
+        "Projets", "demo", 1, 42
+    )
+    assert content == b"contenu reel"
+    assert content_type == "text/plain"