diff --git a/.github/workflows/continuous-synth-e2e.yml b/.github/workflows/continuous-synth-e2e.yml
index 924684e8..ba9633a9 100644
--- a/.github/workflows/continuous-synth-e2e.yml
+++ b/.github/workflows/continuous-synth-e2e.yml
@@ -32,10 +32,20 @@ name: Continuous synthetic E2E (staging)
 
 on:
   schedule:
-    # Every 20 minutes, on the :00 :20 :40. Offsets the existing :15
-    # sweep-cf-orphans and :45 sweep-cf-tunnels so the three
-    # operations don't all hit Cloudflare/AWS at the same minute.
-    - cron: '0,20,40 * * * *'
+    # Every 20 minutes, on :10 :30 :50. Two constraints:
+    #   1. Stay off the top-of-hour. GitHub Actions scheduler drops
+    #      :00 firings under high load (own docs:
+    #      https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule).
+    #      Empirical 2026-05-03: cron was '0,20,40 * * * *' but actual
+    #      firings landed at :08, :03, :01, :03 with :20 + :40 silently
+    #      dropped — only the :00-region run survived. Detection
+    #      latency degraded from claimed 20 min to actual ~60 min.
+    #      :10/:30/:50 sit far enough from :00 that GH-load skips
+    #      stop dropping us.
+    #   2. Avoid colliding with the existing :15 sweep-cf-orphans
+    #      and :45 sweep-cf-tunnels — both hit the CF API and we
+    #      don't want to fight for rate-limit tokens.
+    - cron: '10,30,50 * * * *'
   workflow_dispatch:
     inputs:
       runtime:
diff --git a/canvas/src/components/BundleDropZone.tsx b/canvas/src/components/BundleDropZone.tsx
index dd6bff81..52437db3 100644
--- a/canvas/src/components/BundleDropZone.tsx
+++ b/canvas/src/components/BundleDropZone.tsx
@@ -117,9 +117,11 @@ export function BundleDropZone() {
         📦 Import bundle
       </button>
 
-      {/* Visual overlay when dragging */}
+      {/* Visual overlay when dragging — was hardcoded blue-950/blue-400
+          which doesn't flip with theme. accent colors stay visually
+          consistent with the rest of the canvas in both modes. */}
       {isDragging && (
-        <div className="fixed inset-0 z-20 flex items-center justify-center bg-blue-950/40 backdrop-blur-sm border-2 border-dashed border-blue-400/50 pointer-events-none">
+        <div className="fixed inset-0 z-20 flex items-center justify-center bg-accent/15 backdrop-blur-sm border-2 border-dashed border-accent/40 pointer-events-none">
           <div className="bg-surface-sunken/95 border border-accent/50 rounded-2xl px-8 py-6 shadow-2xl text-center">
             <div className="text-3xl mb-2" aria-hidden="true">📦</div>
             <div className="text-sm font-semibold text-ink">Drop Bundle to Import</div>
@@ -128,10 +130,21 @@ export function BundleDropZone() {
         </div>
       )}
 
-      {/* Importing spinner */}
+      {/* Importing indicator — role=status + aria-live so SR users hear
+          "Importing bundle..." while the API call is in flight, not just
+          the result toast that fires after. motion-safe:animate-spin
+          respects prefers-reduced-motion (Tailwind's motion-safe variant
+          gates animation on the user's OS setting). */}
       {importing && (
-        <div className="fixed bottom-6 left-1/2 -translate-x-1/2 z-50 bg-surface-sunken/95 border border-line/60 rounded-xl px-5 py-3 shadow-2xl flex items-center gap-3">
-          <div className="w-4 h-4 border-2 border-sky-400 border-t-transparent rounded-full animate-spin" />
+        <div
+          role="status"
+          aria-live="polite"
+          className="fixed bottom-6 left-1/2 -translate-x-1/2 z-50 bg-surface-sunken/95 border border-line/60 rounded-xl px-5 py-3 shadow-2xl flex items-center gap-3"
+        >
+          <div
+            aria-hidden="true"
+            className="w-4 h-4 border-2 border-accent border-t-transparent rounded-full motion-safe:animate-spin"
+          />
           <span className="text-sm text-ink">Importing bundle...</span>
         </div>
       )}