feat: pulse loading status detail line

DESIGN.md

@@ -664,7 +664,9 @@ Do not add motion for decoration. New animation must honor
 - Skeletons use `--border-muted`, existing spacing and radius tokens, and a gentle
   shared opacity pulse. Disable animation under `prefers-reduced-motion`. Keep
   placeholders out of the accessibility tree and tab order; label the busy region
-  with a concise status at the bottom of the review surface. Do not invent file
+  with a concise status at the bottom of the review surface. Its detail line
+  pulses between `--fg` and `--muted` on the skeleton rhythm, static under
+  reduced motion. Do not invent file
   names, counts, progress percentages or addition/deletion colors.
 - Replace skeletons as data arrives, without a minimum display delay. Stored
   manifest loading uses the same diff-frame skeleton without unmounting Pierre.

apps/web/src/WorkspaceLoading.tsx

@@ -113,7 +113,9 @@ export function WorkspaceLoading({ collecting }: { collecting: boolean }) {
       <DiffSkeleton />
       <div className="loading-status">
         <h1>{collecting ? "Collecting latest changes" : "Loading review"}</h1>
-        <p>{collecting ? "Reading checkouts…" : "Reading stored changes…"}</p>
+        <p className="motion-safe:animate-status-pulse">
+          {collecting ? "Reading checkouts…" : "Reading stored changes…"}
+        </p>
         <span className="ml-auto flex items-center">
           <SettingsButton />
         </span>

apps/web/src/loading.css

@@ -183,6 +183,13 @@
     opacity: 0.45;
   }
 }
+/* Referenced by the loading status's animate-status-pulse utility. Shares the
+   skeleton rhythm; dims only to --muted so the text stays legible. */
+@keyframes status-pulse {
+  50% {
+    color: var(--muted);
+  }
+}
 @media (max-width: 1011px) {
   .loading-sidebar {
     display: none;

apps/web/src/style.css

@@ -639,6 +639,8 @@ main {
   --color-backdrop: var(--backdrop);
   --animate-spinner: refresh-spin var(--duration-spin) linear infinite;
   --animate-skeleton: skeleton-pulse var(--duration-pulse) ease-in-out infinite;
+  --animate-status-pulse: status-pulse var(--duration-pulse) ease-in-out
+    infinite;
 }
 
 @layer base {