feat: edit existing model entries in the Model Registry

- Inline edit form per model row (label, model name/ID, host/account, context, tags)
- Fetch models button in edit form for local models — same live-picker UX as Add Model
- POST /settings/local/models/{id}/edit route in local_llm.py
- Admin role badge (ADMIN/USER pill) in Account Settings page
- HELP.md updated: new tools table with admin/confirm markers, PWA install section
- TODO updated: tool expansions marked done, distill review and Unsloth resolved,
  role-based access and admin badge added to completed

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

cortex/static/local_llm.html

@@ -182,10 +182,18 @@
     .fetch-status.err { color: #f87171; }
 
     .model-row {
+      background: var(--pg-bg); border: 1px solid var(--pg-border); border-radius: 8px;
+      margin-bottom: 0.5rem; overflow: hidden;
+    }
+    .model-row-header {
       display: flex; align-items: flex-start; justify-content: space-between;
       gap: 0.75rem; padding: 0.75rem 0.9rem;
-      background: var(--pg-bg); border: 1px solid var(--pg-border); border-radius: 8px;
-      margin-bottom: 0.5rem;
+    }
+    .model-btns { display: flex; gap: 0.4rem; align-items: flex-start; flex-shrink: 0; }
+    .model-edit-form {
+      padding: 0.85rem 0.9rem 0.9rem;
+      border-top: 1px solid var(--pg-border);
+      background: var(--pg-surface);
     }
     .model-info { display: flex; flex-direction: column; gap: 0.2rem; min-width: 0; }
     .model-label { font-size: 0.9rem; font-weight: 600; color: var(--pg-text); }
@@ -670,6 +678,78 @@
     // Hide fetch button initially if no hosts
     if (!HAS_HOSTS) fetchBtn.style.display = 'none';
 
+    // ── Model inline edit toggle ──────────────────────────────────────────
+    document.querySelectorAll('.model-edit-btn').forEach(btn => {
+      btn.addEventListener('click', () => {
+        const id   = btn.dataset.id;
+        const form = document.getElementById('edit-form-' + id);
+        const open = form.style.display !== 'none';
+        form.style.display = open ? 'none' : 'block';
+        btn.textContent    = open ? 'Edit' : 'Close';
+      });
+    });
+    document.querySelectorAll('.model-edit-cancel').forEach(btn => {
+      btn.addEventListener('click', () => {
+        const id = btn.dataset.id;
+        document.getElementById('edit-form-' + id).style.display = 'none';
+        document.querySelector(`.model-edit-btn[data-id="${id}"]`).textContent = 'Edit';
+      });
+    });
+
+    // ── Edit form: fetch models from host ────────────────────────────────
+    document.querySelectorAll('.edit-fetch-btn').forEach(btn => {
+      btn.addEventListener('click', async () => {
+        const id       = btn.dataset.id;
+        const hostSel  = document.getElementById('edit-host-' + id);
+        const hostId   = hostSel ? hostSel.value : '';
+        const statusEl = document.getElementById('edit-fetch-status-' + id);
+        btn.disabled = true;
+        statusEl.textContent = 'Fetching…'; statusEl.className = 'fetch-status';
+        const url = '/api/local-llm/fetch-models' + (hostId ? '?host_id=' + encodeURIComponent(hostId) : '');
+        try {
+          const res  = await fetch(url);
+          const data = await res.json();
+          if (data.error) {
+            statusEl.textContent = '✗ ' + data.error; statusEl.className = 'fetch-status err';
+            return;
+          }
+          const picker = document.getElementById('edit-model-picker-' + id);
+          const wrap   = document.getElementById('edit-model-select-wrap-' + id);
+          picker.innerHTML = '<option value="">— select to fill —</option>';
+          data.models.forEach(m => {
+            const opt = document.createElement('option');
+            opt.value        = m.id;
+            opt.textContent  = m.name !== m.id ? `${m.name}  (${m.id})` : m.id;
+            opt.dataset.id   = m.id;
+            opt.dataset.name = m.name;
+            picker.appendChild(opt);
+          });
+          wrap.style.display = 'block';
+          statusEl.textContent = `✓ ${data.models.length} model${data.models.length !== 1 ? 's' : ''}`;
+          statusEl.className   = 'fetch-status ok';
+        } catch (e) {
+          statusEl.textContent = '✗ ' + e.message; statusEl.className = 'fetch-status err';
+        } finally {
+          btn.disabled = false;
+        }
+      });
+    });
+
+    document.querySelectorAll('[id^="edit-model-picker-"]').forEach(picker => {
+      picker.addEventListener('change', () => {
+        const opt = picker.options[picker.selectedIndex];
+        if (!opt.value) return;
+        const id   = picker.id.replace('edit-model-picker-', '');
+        const form = document.getElementById('edit-form-' + id);
+        form.querySelector('input[name="model_name"]').value = opt.dataset.id || opt.value;
+        const labelInput = form.querySelector('input[name="label"]');
+        if (!labelInput.value) {
+          const n = opt.dataset.name;
+          labelInput.value = (n && n !== opt.dataset.id) ? n : '';
+        }
+      });
+    });
+
     // ── Claude CLI auth status ─────────────────────────────────────────────
     (async function() {
       const el  = document.getElementById('claude-auth-status');