feat(ui): project details panel + compact/responsive cards; rename Sentinel→Yerin (red); migrate research_notes

- Project card expands to show description + status + dates (was only the research stub)
- Cards compacted + responsive (actions wrap on narrow)
- Sentinel renamed Yerin everywhere (#/yerin, red 'Sage of the Endless Sword' theme + red sidebar dot)
- void1 importer now carries research_notes/last_researched_at (was dropped)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/components/project_card.js

@@ -51,6 +51,24 @@ export function projectCard(p, o) {
 
   if (open) {
     const panel = el('div', { class: 'proj-panel' });
+
+    // ---- Details ----
+    panel.appendChild(el('div', { class: 'proj-section-h' }, 'Details'));
+    const det = el('div', { class: 'proj-details' });
+    det.appendChild(p.description
+      ? el('div', { class: 'proj-detail-desc' }, p.description)
+      : el('div', { class: 'muted', style: { fontSize: '12px' } }, 'No description yet — Edit to add one.'));
+    const dl = el('dl', { class: 'proj-dl' });
+    const addDL = (k, v) => { if (v) { dl.appendChild(el('dt', {}, k)); dl.appendChild(el('dd', {}, v)); } };
+    addDL('Status', p.status);
+    addDL('Created', p.created_at ? new Date(p.created_at).toLocaleDateString() : null);
+    addDL('Updated', p.updated_at ? `${new Date(p.updated_at).toLocaleDateString()} (${ago(p.updated_at)})` : null);
+    if (p.started_at) addDL('Started', new Date(p.started_at).toLocaleDateString());
+    if (p.completed_at) addDL('Completed', new Date(p.completed_at).toLocaleDateString());
+    det.appendChild(dl);
+    panel.appendChild(det);
+
+    // ---- Eithan research ----
     panel.appendChild(el('div', { class: 'proj-section-h' }, 'Eithan research' + (p.last_researched_at ? ` · ${ago(p.last_researched_at)}` : '')));
     if (busy) panel.appendChild(el('div', { class: 'muted' }, "Queued for Eithan — he'll fill this in once the agent ships."));
     else if (p.research_notes) { const n = el('div', { class: 'md-preview' }); n.innerHTML = renderMarkdown(p.research_notes); panel.appendChild(n); }

public/components/sidebar.js

@@ -90,7 +90,7 @@ export function renderSidebar(root) {
     ),
     el('div', { class: 'sb-section' },
       el('div', { class: 'sb-title' }, 'Agents'),
-      navItem('Sentinel', '/sentinel', { dot: 'ok' }),
+      navItem('Yerin', '/yerin', { dot: 'yerin' }),
       navItem('Little Blue', '/little-blue', { dot: 'lb' })
     ),
     el('div', { class: 'sb-section' },