feat(activity): merge CAD + render jobs into unified timeline

- Single chronological list sorted by updated_at (newest first)
- Type badges distinguish CAD processing (FileCode2) from Render jobs (Image)
- Render job rows now link directly to the order (/orders/:id)
- Remove separate "Render Jobs" and "CAD File Processing" sections
- Stat cards simplified to 4: CAD active/failed + Render active/failed
- Backend: add order_id to RenderJobEntry response
- Frontend: add order_id to RenderJobEntry interface, remove flamenco_job_id

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/WorkerActivity.tsx

@@ -4,7 +4,7 @@ import { toast } from 'sonner'
 import {
   Activity, CheckCircle2, XCircle, Loader2, Clock, RefreshCw,
   ChevronDown, ChevronRight, RotateCcw, Terminal, Cpu, Image,
-  ExternalLink, Trash2, Ban, ListOrdered,
+  Trash2, Ban, ListOrdered, FileCode2,
 } from 'lucide-react'
 import { Link } from 'react-router-dom'
 import {
@@ -13,6 +13,10 @@ import {
 } from '../api/worker'
 import LiveRenderLog from '../components/LiveRenderLog'
 
+type UnifiedEvent =
+  | { kind: 'cad';    ts: number; entry: CadActivityEntry }
+  | { kind: 'render'; ts: number; job: RenderJobEntry }
+
 export default function WorkerActivityPage() {
   const qc = useQueryClient()
   const [expanded, setExpanded] = useState<Set<string>>(new Set())
@@ -43,6 +47,20 @@ export default function WorkerActivityPage() {
       return n
     })
 
+  // Merge + sort both event streams into one unified timeline
+  const events: UnifiedEvent[] = []
+  if (data) {
+    for (const entry of data.cad_processing) {
+      events.push({ kind: 'cad', ts: new Date(entry.updated_at).getTime(), entry })
+    }
+    for (const job of data.render_jobs) {
+      events.push({ kind: 'render', ts: new Date(job.updated_at).getTime(), job })
+    }
+    events.sort((a, b) => b.ts - a.ts)
+  }
+
+  const isEmpty = !isLoading && events.length === 0
+
   return (
     <div className="p-8 max-w-5xl mx-auto space-y-6">
       <div className="flex items-center gap-3">
@@ -65,13 +83,11 @@ export default function WorkerActivityPage() {
 
       {/* Summary */}
       {data && (
-        <div className="grid grid-cols-3 sm:grid-cols-6 gap-4">
-          <StatCard label="CAD files" value={data.cad_processing.length} color="text-content-secondary" />
-          <StatCard label="CAD processing" value={data.active_count}
+        <div className="grid grid-cols-2 sm:grid-cols-4 gap-4">
+          <StatCard label="CAD active" value={data.active_count}
             color={data.active_count > 0 ? 'text-status-info-text' : 'text-content-secondary'} />
           <StatCard label="CAD failed" value={data.failed_count}
             color={data.failed_count > 0 ? 'text-red-600' : 'text-content-secondary'} />
-          <StatCard label="Render jobs" value={data.render_jobs.length} color="text-content-secondary" />
           <StatCard label="Rendering" value={data.render_active_count}
             color={data.render_active_count > 0 ? 'text-status-info-text' : 'text-content-secondary'} />
           <StatCard label="Render failed" value={data.render_failed_count}
@@ -85,113 +101,115 @@ export default function WorkerActivityPage() {
         </div>
       )}
 
-      {data && data.cad_processing.length === 0 && !isLoading && (
+      {isEmpty && (
         <div className="card p-12 text-center text-content-muted">
           <Activity size={32} className="mx-auto mb-3 text-content-muted" />
           <p className="font-medium">No recent activity</p>
-          <p className="text-sm mt-1">STEP file processing jobs will appear here.</p>
+          <p className="text-sm mt-1">STEP processing and render jobs will appear here.</p>
         </div>
       )}
 
-      {/* ── Render Jobs ─────────────────────────────────────────────────── */}
-      {data && data.render_jobs.length > 0 && (
-        <div>
-          <h2 className="text-sm font-semibold text-content-muted uppercase tracking-wide mb-2">Render Jobs</h2>
-          <div className="card overflow-hidden divide-y divide-border-light">
-            {data.render_jobs.map((job) => (
-              <RenderJobRow key={job.order_line_id} job={job} />
-            ))}
-          </div>
-        </div>
-      )}
-
-      {/* ── CAD File Processing ──────────────────────────────────────────── */}
-      {data && data.cad_processing.length > 0 && (
-        <div>
-          <h2 className="text-sm font-semibold text-content-muted uppercase tracking-wide mb-2">CAD File Processing</h2>
-        </div>
-      )}
-      {data && data.cad_processing.length > 0 && (
+      {/* ── Unified timeline ─────────────────────────────────────────────── */}
+      {events.length > 0 && (
         <div className="card overflow-hidden divide-y divide-border-light">
-          {data.cad_processing.map((entry) => (
-            <div key={entry.cad_file_id}>
-              {/* ── Main row ── */}
-              <div
-                className="flex items-center gap-3 px-4 py-3 hover:bg-surface-hover cursor-pointer select-none"
-                onClick={() => toggle(entry.cad_file_id)}
-              >
-                {/* Expand toggle */}
-                <span className="text-content-muted shrink-0">
-                  {expanded.has(entry.cad_file_id)
-                    ? <ChevronDown size={15} />
-                    : <ChevronRight size={15} />}
-                </span>
+          {events.map((ev) =>
+            ev.kind === 'render' ? (
+              <RenderJobRow key={`render-${ev.job.order_line_id}`} job={ev.job} />
+            ) : (
+              <CadFileRow
+                key={`cad-${ev.entry.cad_file_id}`}
+                entry={ev.entry}
+                expanded={expanded.has(ev.entry.cad_file_id)}
+                onToggle={() => toggle(ev.entry.cad_file_id)}
+                onReprocess={() => reprocessMut.mutate(ev.entry.cad_file_id)}
+                reprocessPending={reprocessMut.isPending}
+              />
+            )
+          )}
+        </div>
+      )}
+    </div>
+  )
+}
 
-                {/* Status icon */}
-                <StatusIcon status={entry.processing_status} />
+// ── CAD file row (extracted from inline JSX above) ────────────────────────────
 
-                {/* File name */}
-                <div className="flex-1 min-w-0">
-                  <p className="font-mono text-sm text-content truncate" title={entry.original_name}>
-                    {entry.original_name}
-                  </p>
-                  <div className="flex items-center gap-3 mt-0.5 flex-wrap">
-                    {entry.order_numbers.length > 0 && (
-                      <div className="flex gap-1 flex-wrap">
-                        {entry.order_numbers.map((n) => (
-                          <span key={n} className="text-xs font-medium bg-surface-muted text-content-secondary px-1.5 py-0.5 rounded">
-                            {n}
-                          </span>
-                        ))}
-                      </div>
-                    )}
-                    {entry.file_size != null && (
-                      <span className="text-xs text-content-muted">{formatBytes(entry.file_size)}</span>
-                    )}
-                    {entry.render_log?.renderer && (
-                      <RendererBadge log={entry.render_log} />
-                    )}
-                    {entry.render_log?.total_duration_s != null && (
-                      <span className="text-xs text-content-muted flex items-center gap-1">
-                        <Clock size={11} />{entry.render_log.total_duration_s}s total
-                      </span>
-                    )}
-                  </div>
-                  {entry.error_message && (
-                    <p className="text-xs text-red-500 mt-0.5 truncate" title={entry.error_message}>
-                      {entry.error_message}
-                    </p>
-                  )}
-                </div>
+function CadFileRow({
+  entry, expanded, onToggle, onReprocess, reprocessPending,
+}: {
+  entry: CadActivityEntry
+  expanded: boolean
+  onToggle: () => void
+  onReprocess: () => void
+  reprocessPending: boolean
+}) {
+  return (
+    <div>
+      <div
+        className="flex items-center gap-3 px-4 py-3 hover:bg-surface-hover cursor-pointer select-none"
+        onClick={onToggle}
+      >
+        {/* Type badge */}
+        <span className="shrink-0 flex items-center gap-1 text-[10px] font-semibold uppercase tracking-wide text-content-muted w-14">
+          <FileCode2 size={11} />CAD
+        </span>
 
-                {/* Timestamp */}
-                <div className="text-xs text-content-muted shrink-0 text-right hidden sm:block">
-                  <p>{new Date(entry.updated_at).toLocaleDateString('de-DE')}</p>
-                  <p>{new Date(entry.updated_at).toLocaleTimeString('de-DE')}</p>
-                </div>
+        {/* Expand toggle */}
+        <span className="text-content-muted shrink-0">
+          {expanded ? <ChevronDown size={15} /> : <ChevronRight size={15} />}
+        </span>
 
-                {/* Re-process button */}
-                <button
-                  onClick={(e) => {
-                    e.stopPropagation()
-                    reprocessMut.mutate(entry.cad_file_id)
-                  }}
-                  disabled={reprocessMut.isPending}
-                  title="Re-convert STEP + regenerate thumbnail"
-                  className="shrink-0 p-1.5 rounded text-content-muted hover:text-accent hover:bg-surface-hover transition-colors"
-                >
-                  <RotateCcw size={14} />
-                </button>
+        <StatusIcon status={entry.processing_status} />
+
+        <div className="flex-1 min-w-0">
+          <p className="font-mono text-sm text-content truncate" title={entry.original_name}>
+            {entry.original_name}
+          </p>
+          <div className="flex items-center gap-3 mt-0.5 flex-wrap">
+            {entry.order_numbers.length > 0 && (
+              <div className="flex gap-1 flex-wrap">
+                {entry.order_numbers.map((n) => (
+                  <span key={n} className="text-xs font-medium bg-surface-muted text-content-secondary px-1.5 py-0.5 rounded">
+                    {n}
+                  </span>
+                ))}
               </div>
+            )}
+            {entry.file_size != null && (
+              <span className="text-xs text-content-muted">{formatBytes(entry.file_size)}</span>
+            )}
+            {entry.render_log?.renderer && <RendererBadge log={entry.render_log} />}
+            {entry.render_log?.total_duration_s != null && (
+              <span className="text-xs text-content-muted flex items-center gap-1">
+                <Clock size={11} />{entry.render_log.total_duration_s}s
+              </span>
+            )}
+          </div>
+          {entry.error_message && (
+            <p className="text-xs text-red-500 mt-0.5 truncate" title={entry.error_message}>
+              {entry.error_message}
+            </p>
+          )}
+        </div>
 
-              {/* ── Expanded detail panel ── */}
-              {expanded.has(entry.cad_file_id) && (
-                <div className="bg-surface-alt border-t border-border-light px-6 py-4 space-y-4">
-                  <RenderDetails entry={entry} />
-                </div>
-              )}
-            </div>
-          ))}
+        <div className="text-xs text-content-muted shrink-0 text-right hidden sm:block">
+          <p>{new Date(entry.updated_at).toLocaleDateString('de-DE')}</p>
+          <p>{new Date(entry.updated_at).toLocaleTimeString('de-DE')}</p>
+        </div>
+
+        <button
+          onClick={(e) => { e.stopPropagation(); onReprocess() }}
+          disabled={reprocessPending}
+          title="Re-convert STEP + regenerate thumbnail"
+          className="shrink-0 p-1.5 rounded text-content-muted hover:text-accent hover:bg-surface-hover transition-colors"
+        >
+          <RotateCcw size={14} />
+        </button>
+      </div>
+
+      {expanded && (
+        <div className="bg-surface-alt border-t border-border-light px-6 py-4 space-y-4">
+          <RenderDetails entry={entry} />
         </div>
       )}
     </div>
@@ -393,6 +411,11 @@ function RenderJobRow({ job }: { job: RenderJobEntry }) {
   return (
     <>
     <div className="flex items-center gap-3 px-4 py-3 hover:bg-surface-hover">
+      {/* Type badge */}
+      <span className="shrink-0 flex items-center gap-1 text-[10px] font-semibold uppercase tracking-wide text-violet-500 w-14">
+        <Image size={11} />Render
+      </span>
+
       <StatusIcon status={job.render_status} />
 
       <div className="flex-1 min-w-0">
@@ -407,32 +430,22 @@ function RenderJobRow({ job }: { job: RenderJobEntry }) {
           )}
         </div>
         <div className="flex items-center gap-3 mt-0.5 flex-wrap">
-          {job.order_number && (
+          {job.order_number && job.order_id ? (
             <Link
-              to={`/orders`}
+              to={`/orders/${job.order_id}`}
               className="text-xs font-medium bg-surface-muted text-content-secondary px-1.5 py-0.5 rounded hover:bg-surface-hover"
             >
               {job.order_number}
             </Link>
-          )}
-          {job.render_backend_used && (
-            <span className={`text-xs px-1.5 py-0.5 rounded font-medium ${
-              job.render_backend_used === 'flamenco'
-                ? 'bg-status-warning-bg text-status-warning-text'
-                : 'bg-status-info-bg text-status-info-text'
-            }`}>
-              {job.render_backend_used === 'flamenco' ? 'Flamenco' : 'Celery'}
+          ) : job.order_number ? (
+            <span className="text-xs font-medium bg-surface-muted text-content-secondary px-1.5 py-0.5 rounded">
+              {job.order_number}
+            </span>
+          ) : null}
+          {job.render_backend_used && (
+            <span className="text-xs px-1.5 py-0.5 rounded font-medium bg-status-info-bg text-status-info-text">
+              Celery
             </span>
-          )}
-          {job.flamenco_job_id && (
-            <a
-              href="http://localhost:8080"
-              target="_blank"
-              rel="noopener noreferrer"
-              className="text-xs text-status-warning-text hover:text-status-warning-text flex items-center gap-0.5"
-            >
-              <ExternalLink size={10} /> Flamenco
-            </a>
           )}
           {elapsed && (
             <span className="text-xs text-content-muted flex items-center gap-1">