v0.2.1 - Model download with %% progress

Backend:
- download.py module: drives ./hf-download.sh <repo> [-c --copy-parallel] over SSH, parses tqdm output (regex matches '8%|...| 2.06G/25.1G [03:20<18:35, 20.6MB/s]') into percent + bytes done/total + elapsed + ETA + rate
- DownloadManager: in-memory job tracking with asyncio.Lock (one download at a time)
- POST /api/download, GET /api/download/{id}, SSE /api/download/{id}/stream
- Phase detection: Connecting / Fetching N files / Downloading / Copying to peer Sparks / Done

Frontend:
- '+ Download a new model' button next to LLM swap section title
- Inline form: HF repo text field + solo/cluster radio + Cancel/Start
- Progress UI: spinner, elapsed timer, phase label, percent fill, stats line (bytes/rate/ETA), collapsible raw logs

Package: bump 0.2.1:0

image/app/static/style.css

@@ -217,6 +217,70 @@ main {
   word-break: break-word;
 }
 
+/* ===== Section header (title + action button) ===== */
+
+.section-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  margin: 24px 0 12px;
+}
+.section-header .section-title { margin: 0; }
+.section-header .spacer { flex: 1; }
+.section-header .small-btn,
+.btn.small-btn {
+  margin-left: auto;
+  padding: 5px 12px;
+  font-size: 12px;
+}
+
+/* ===== Download panel ===== */
+
+.download-panel {
+  background: var(--surface);
+  border: 1px solid var(--info);
+  border-radius: var(--radius);
+  padding: 14px 16px;
+  margin-bottom: 16px;
+}
+.download-form .dl-row {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 6px 0;
+  flex-wrap: wrap;
+}
+.dl-label {
+  color: var(--muted);
+  font-size: 12px;
+  min-width: 110px;
+  flex-shrink: 0;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+.dl-row input[type='text'] {
+  flex: 1;
+  background: var(--surface-2);
+  border: 1px solid var(--border);
+  color: var(--text);
+  padding: 7px 10px;
+  border-radius: 6px;
+  font: 13px ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
+  min-width: 200px;
+}
+.dl-row input[type='text']:focus { outline: 1px solid var(--info); border-color: var(--info); }
+.radio { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text); cursor: pointer; }
+.radio input { accent-color: var(--accent); }
+.dl-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 10px; }
+.dl-stats {
+  margin-top: 8px;
+  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
+}
+.dl-header { display: flex; align-items: center; gap: 12px; }
+.dl-header #dl-title { font-weight: 600; color: var(--info); }
+#dl-log-details { margin-top: 12px; }
+#dl-log-details summary { cursor: pointer; padding: 4px 0; }
+
 /* ===== Section titles ===== */
 
 .section-title {