feat(forgejo-metrics): adjust line stats caching strategy and improve retry logic for contributor stats

backend/app/api/forgejo_metrics.py

@@ -36,7 +36,8 @@ if TYPE_CHECKING:
 # ---------------------------------------------------------------------------
 _line_stats_cache: dict[str, tuple[float, int, int, bool]] = {}
 _line_stats_fetching: set[str] = set()
-_LINE_STATS_TTL = 300  # seconds before a re-fetch is triggered
+_LINE_STATS_TTL_HIT  = 300  # 5 min — re-fetch cadence once real data is cached
+_LINE_STATS_TTL_MISS = 30   # 30 s  — retry cadence while Forgejo is still computing
 
 
 async def _bg_fetch_line_stats(
@@ -383,8 +384,9 @@ async def get_forgejo_heatmap(
     cached = _line_stats_cache.get(cache_key)
     now = _time.monotonic()
 
+    ttl = _LINE_STATS_TTL_HIT if (cached and cached[3]) else _LINE_STATS_TTL_MISS
     if cache_key not in _line_stats_fetching and (
-        cached is None or now - cached[0] > _LINE_STATS_TTL
+        cached is None or now - cached[0] > ttl
     ):
         # Normalise base_url the same way get_forgejo_client() does, eagerly,
         # so the background task never touches a potentially-closed session.

backend/app/services/forgejo_client.py

@@ -353,28 +353,22 @@ class ForgejoAPIClient:
     async def get_contributor_stats(self, owner: str, repo: str) -> tuple[list[dict], bool]:
         """Fetch per-contributor weekly stats for a repository.
 
-        Returns (contributors, has_data).  On the first call Forgejo may return
-        HTTP 202 ("computing") — we wait 2 s and retry once so the stats are
-        available on the next dashboard load even if not this one.
+        Returns (contributors, has_data).  Forgejo returns HTTP 202 while it
+        computes stats — that is not an error, it just means the caller should
+        retry later.  has_data=False signals the 202 case; the application layer
+        uses a short retry TTL so it probes again within ~30 s.
 
-        Each contributor has a ``weeks`` array with ``w`` (Unix timestamp of
-        week start), ``a`` (additions), and ``d`` (deletions).
+        Each contributor dict has a ``weeks`` array with ``w`` (Unix timestamp),
+        ``a`` (additions), and ``d`` (deletions).
         """
-        import asyncio as _asyncio
-
         client = await self._get_client()
-        url = f"/api/v1/repos/{owner}/{repo}/stats/contributors"
-        response = await client.get(url)
-
+        response = await client.get(
+            f"/api/v1/repos/{owner}/{repo}/stats/contributors"
+        )
         if response.status_code == 202:
-            # Forgejo is computing — wait briefly then try once more
-            await _asyncio.sleep(2)
-            response = await client.get(url)
-
-        if response.status_code == 202:
-            return [], False  # still computing after retry
+            return [], False  # still computing — caller will retry shortly
         if response.status_code == 404:
-            return [], True   # no data, but not a 202 — treat as "has_data"
+            return [], True   # repo exists but no commits; treat as data-present
         response.raise_for_status()
         data = response.json()
         return (data if isinstance(data, list) else []), True

frontend/src/components/git/ForgejoHeatmap.tsx

@@ -12,12 +12,12 @@ interface ForgejoHeatmapProps {
   isLoading?: boolean;
 }
 
-const CELL  = 13;
-const GAP   = 3;
+const CELL  = 16;
+const GAP   = 4;
 const STRIDE = CELL + GAP;
 const WEEKS = 27;
-const LEFT  = 28;
-const TOP   = 18;
+const LEFT  = 32;
+const TOP   = 20;
 
 const MONTHS = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
 
@@ -33,7 +33,7 @@ const LEVEL_FILL = [
 const VIOLET    = "rgba(139,92,246,1)";
 const GREEN     = "rgba(52,211,153,1)";
 const RED       = "rgba(248,113,113,1)";
-const LABEL_CLR = "rgba(139,92,246,0.65)";
+const LABEL_CLR = "rgba(255,255,255,0.70)";  // white labels
 
 function toLevel(count: number): number {
   if (count === 0) return 0;
@@ -166,23 +166,15 @@ export function ForgejoHeatmap({
         <span>More</span>
       </div>
 
-      {/* ── Contributions badge ──────────────────────────────────── */}
-      <div className="flex justify-center">
-        <div
-          className="inline-flex items-baseline gap-2 rounded-full px-5 py-2"
-          style={{
-            background: "rgba(139,92,246,0.10)",
-            border: "1px solid rgba(139,92,246,0.25)",
-          }}
-        >
+      {/* ── Contributions summary ────────────────────────────────── */}
+      <p className="text-center">
         <span className="text-2xl font-bold tabular-nums" style={{ color: VIOLET }}>
           {totalEvents.toLocaleString()}
         </span>
-          <span className="text-sm font-medium" style={{ color: LABEL_CLR }}>
+        <span className="ml-1.5 text-sm" style={{ color: "rgba(255,255,255,0.70)" }}>
           contributions across all tracked repositories in the last 6 months
         </span>
-        </div>
-      </div>
+      </p>
 
       {/* ── Line stats ──────────────────────────────────────────── */}
       {hasLineStats ? (