Rate monitor: rate-limit bans drain down as a visible countdown

A banned service used to just tint red. The payload carries the seconds
remaining (rl_remaining), so the bar now locks into a cooldown state: the live
VU dims, a red column drains away as the ban ticks down (largest remaining
seen is latched as the denominator — only remaining is sent), and an m:ss
timer counts to recovery. The moment the ban expires the track flashes green
('recovered') and the VU takes the stage back. 'Back in 4:00', not
'something's red'.

webui/static/api-monitor.js

@@ -237,6 +237,10 @@ function _renderEqualizerBars(grid, data) {
                         <div class="rate-eq-tip"></div>
                     </div>
                     <div class="rate-eq-peak"></div>
+                    <div class="rate-eq-cooldown">
+                        <div class="rate-eq-cooldown-fill"></div>
+                        <div class="rate-eq-cooldown-time"></div>
+                    </div>
                     <div class="rate-eq-value">0</div>
                 </div>
                 <div class="rate-eq-meta">
@@ -350,7 +354,36 @@ function _renderEqualizerBars(grid, data) {
         bar.classList.toggle('active', value > 0 || wStatus === 'running');
         bar.classList.toggle('rate-limited', isRateLimited);
 
-        _eqDisplay[svc] = { value, pct, peak, peakAt };
+        // Cooldown drain — a ban isn't just "red", it's a COUNTDOWN. The
+        // payload only carries seconds remaining, so latch the largest value
+        // seen this ban as the denominator; the red column then drains away
+        // as the ban ticks down and the timer shows m:ss until recovery.
+        const rlRemaining = isRateLimited ? Math.max(0, Math.round(d.rl_remaining || 0)) : 0;
+        let rlTotal = prev.rlTotal || 0;
+        const cooling = rlRemaining > 0;
+        if (cooling) {
+            rlTotal = Math.max(rlTotal, rlRemaining);
+            const cdFill = bar.querySelector('.rate-eq-cooldown-fill');
+            if (cdFill) cdFill.style.height = `${(rlRemaining / rlTotal) * 100}%`;
+            const cdTime = bar.querySelector('.rate-eq-cooldown-time');
+            if (cdTime) {
+                const m = Math.floor(rlRemaining / 60);
+                const s = String(rlRemaining % 60).padStart(2, '0');
+                cdTime.textContent = `${m}:${s}`;
+            }
+        } else {
+            rlTotal = 0;
+            // Recovery moment: the ban just ended — flash the bar back alive.
+            if (prev.cooling) {
+                bar.classList.remove('recovered');
+                void bar.offsetWidth;  // restart the animation
+                bar.classList.add('recovered');
+                window.setTimeout(() => bar.classList.remove('recovered'), 1300);
+            }
+        }
+        bar.classList.toggle('cooldown', cooling);
+
+        _eqDisplay[svc] = { value, pct, peak, peakAt, rlTotal, cooling };
     }
 }
 

webui/static/style.css

@@ -63265,6 +63265,77 @@ body.reduce-effects .dash-card::after {
     opacity: 0.75;
 }
 
+/* Cooldown drain — while a service is rate-limit banned, the track shows a
+ * red column that DRAINS as the ban ticks down plus an m:ss countdown.
+ * "Back in 4:00", not just "something's red". JS drives the fill height
+ * (remaining/total) and timer text; .cooldown gates visibility. */
+.rate-eq-cooldown {
+    position: absolute;
+    inset: 0;
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity 0.4s;
+    z-index: 3;
+}
+
+.rate-eq.cooldown .rate-eq-cooldown {
+    opacity: 1;
+}
+
+.rate-eq.cooldown .rate-eq-fill,
+.rate-eq.cooldown .rate-eq-peak {
+    opacity: 0.18;  /* the live VU yields the stage to the countdown */
+}
+
+.rate-eq-cooldown-fill {
+    position: absolute;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    height: 100%;
+    background: linear-gradient(180deg,
+        rgba(239, 68, 68, 0.55) 0%,
+        rgba(239, 68, 68, 0.28) 60%,
+        rgba(239, 68, 68, 0.12) 100%);
+    border-radius: 0 0 11px 11px;
+    box-shadow: inset 0 1px 0 rgba(255, 120, 120, 0.5);
+    transition: height 0.9s linear;
+}
+
+.rate-eq-cooldown-time {
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: 50%;
+    transform: translateY(-50%);
+    text-align: center;
+    font-size: 11px;
+    font-weight: 700;
+    font-variant-numeric: tabular-nums;
+    color: rgba(255, 200, 200, 0.95);
+    text-shadow: 0 0 8px rgba(239, 68, 68, 0.8);
+}
+
+/* Recovery flash — the moment a ban expires the track blinks back alive */
+.rate-eq.recovered .rate-eq-track {
+    animation: rate-eq-recovered 1.2s ease-out;
+}
+
+@keyframes rate-eq-recovered {
+    0% {
+        border-color: rgba(74, 222, 128, 0.9);
+        box-shadow:
+            inset 0 1px 0 rgba(255, 255, 255, 0.04),
+            0 0 26px rgba(74, 222, 128, 0.55);
+    }
+    100% {
+        border-color: rgba(255, 255, 255, 0.06);
+        box-shadow:
+            inset 0 1px 0 rgba(255, 255, 255, 0.04),
+            inset 0 -10px 24px rgba(0, 0, 0, 0.35);
+    }
+}
+
 /* Vertical shimmer scan — runs continuously when active */
 .rate-eq-shimmer {
     position: absolute;