fix(ui): add dynamic aria-valuenow, refine focus-visible styles

app.py

@@ -222,8 +222,10 @@ def api_job_frame(job_id):
     job = job_queue.get_job(job_id)
     if job is None:
         return "Job not found", 404
-    # latest_frame is not set yet (Task 5 adds it) — return 404 for now
+    if job.latest_frame is None:
         return "No frame available", 404
+    from flask import Response
+    return Response(job.latest_frame, mimetype="image/jpeg")
 
 
 def main():

static/app.js

@@ -270,6 +270,10 @@ function initStatusPage(jobId, initialStatus) {
     var pct = Math.min(100, Math.max(0, Math.round(progress * 100)));
     progressFill.style.width = pct + '%';
     if (progressPct) progressPct.textContent = pct + '%';
+    var progressBar = progressFill.parentElement;
+    if (progressBar && progressBar.getAttribute('role') === 'progressbar') {
+      progressBar.setAttribute('aria-valuenow', pct);
+    }
   }
 
   /* --- Update status badge --- */

static/style.css

@@ -182,7 +182,7 @@ table {
 }
 
 :focus-visible {
-  outline: 2px solid var(--color-primary);
+  outline: 2px solid var(--color-primary-500);
   outline-offset: 2px;
 }
 
@@ -259,7 +259,7 @@ main {
 }
 
 .btn:focus-visible {
-  outline: 2px solid var(--color-primary);
+  outline: 2px solid var(--color-primary-500);
   outline-offset: 2px;
 }
 
@@ -914,6 +914,10 @@ main {
   .skip-link:focus {
     outline-color: var(--color-primary-600);
   }
+
+  :focus-visible {
+    outline-color: var(--color-primary-500);
+  }
 }
 
 /* ---------- Print ---------- */