feat: inline machine ID editing in Previous Photos

Tap any machine ID in the Previous Photos list to edit it inline.
- Replaces static text with editable input on click/tap
- Enter/blur saves via /api/assign-machine-id
- Esc restores original value
- Shows ✏️ indicator on hover
- Saves new ID to DB, refreshes asset info and badge instantly

static/index.html

@@ -278,6 +278,21 @@ if ('serviceWorker' in navigator) {
     border-radius: var(--radius-sm); margin-bottom: 8px;
     cursor: zoom-in; display: block; background: var(--card2);
   }
+  /* Inline machine ID editing in Previous Photos */
+  .prev-mid-editable {
+    cursor: text; border-bottom: 1px dashed var(--text3);
+    transition: border-color 0.15s, color 0.15s;
+    padding: 0 2px;
+  }
+  .prev-mid-editable:hover { border-color: var(--accent); color: var(--text); }
+  .prev-mid-editable::after { content: ' ✏️'; font-size: 9px; opacity: 0.5; }
+  .prev-mid-editable:hover::after { opacity: 1; }
+  .prev-mid-input {
+    background: var(--card2); color: var(--text); border: 1px solid var(--accent);
+    border-radius: 6px; padding: 2px 6px; font-size: 11px; font-weight: 700;
+    width: 100px; outline: none;
+  }
+  .prev-mid-input:focus { border-color: var(--accent2); box-shadow: 0 0 0 2px rgba(59,130,246,0.3); }
 
   .export-modal-backdrop { position: fixed; inset: 0; z-index: 999; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; }
   .export-modal { background: var(--card); border-radius: var(--radius); padding: 20px; max-width: 320px; width: 90%; text-align: center; }
@@ -568,7 +583,7 @@ function renderPrevCard(p) {
       <span class="prev-time">${time}</span>
     </div>
     <div class="prev-details">
-      Machine: <strong>${p.machine_id ? esc(p.machine_id) : '—'}</strong>
+      Machine: <span id="midSpan${p.id}" class="prev-mid-editable" data-mid="${esc(p.machine_id || '')}" onclick="editMachineIdInline(${p.id})">${esc(p.machine_id || '—')}</span>
       <span class="match-badge ${hasMatch}">${esc(matchText)}</span>
       <span class="engine-badge ${engCls}">${esc(engine)}${p.ocr_model ? ' ' + esc(p.ocr_model) : ''}</span>
       ${colorHtml}
@@ -603,6 +618,92 @@ function renderPrevCard(p) {
   </div>`;
 }
 
+/* ── Inline machine ID editing in Previous Photos ── */
+function editMachineIdInline(photoId) {
+  const span = document.getElementById('midSpan' + photoId);
+  if (!span) return;
+  const currentVal = span.dataset.mid || '';
+  const input = document.createElement('input');
+  input.type = 'text';
+  input.className = 'prev-mid-input';
+  input.value = currentVal;
+  input.placeholder = 'Enter machine ID';
+  input.dataset.photoId = photoId;
+  input.dataset.original = currentVal;
+  span.replaceWith(input);
+  input.focus();
+  input.select();
+  input.addEventListener('blur', () => saveMachineIdInline(input, photoId));
+  input.addEventListener('keydown', (e) => {
+    if (e.key === 'Enter') input.blur();
+    if (e.key === 'Escape') { saveMachineIdInline(input, photoId, true); }
+  });
+}
+
+function saveMachineIdInline(input, photoId, cancel) {
+  const orig = input.dataset.original || '';
+  const val = cancel ? orig : input.value.trim();
+  // Restore span first so UI is consistent
+  function restoreSpan(mid, label) {
+    const span = document.createElement('span');
+    span.id = 'midSpan' + photoId;
+    span.className = 'prev-mid-editable';
+    span.dataset.mid = mid || '';
+    span.textContent = label || mid || '—';
+    span.onclick = () => editMachineIdInline(photoId);
+    input.replaceWith(span);
+    return span;
+  }
+  if (cancel || val === orig) {
+    restoreSpan(orig, orig || '—');
+    return;
+  }
+  fetch('/api/assign-machine-id', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ photo_id: photoId, machine_id: val })
+  })
+  .then(r => r.json())
+  .then(data => {
+    restoreSpan(val, val);
+    // Update the badge
+    const card = document.getElementById('midSpan' + photoId)?.closest('.prev-photo-card');
+    if (card) {
+      const badge = card.querySelector('.match-badge');
+      if (badge) {
+        badge.textContent = val;
+        badge.className = 'match-badge matched';
+      }
+    }
+    // Update asset info
+    const assetEl = document.getElementById('prevAsset' + photoId);
+    const infoEl = document.getElementById('prevMachineInfo' + photoId);
+    if (data.asset) {
+      const a = data.asset;
+      if (assetEl) {
+        assetEl.innerHTML = '🆔 ' + esc(a.machine_id) + ' · <strong>' + esc(a.name) + '</strong>' +
+          (a.category ? ' · 📦 ' + esc(a.category) : '') +
+          (a.status === 'active' ? ' 🟢 Active' : '');
+      }
+      if (infoEl) {
+        const parts = [a.location_name, a.building, a.floor, a.zone].filter(Boolean);
+        infoEl.innerHTML = parts.join(' · ') || '(No location details)';
+      }
+    } else {
+      if (assetEl) assetEl.innerHTML = '⚠️ No asset match for <strong>' + esc(val) + '</strong>';
+    }
+  })
+  .catch(() => {
+    restoreSpan(orig, orig || '—');
+    // Show error toast
+    const toast = document.createElement('div');
+    toast.style.cssText = 'position:fixed;bottom:60px;left:50%;transform:translateX(-50%);background:var(--red);color:#fff;padding:8px 16px;border-radius:8px;font-size:13px;z-index:9999;animation:fadeIn 0.2s;';
+    toast.textContent = 'Failed to save machine ID';
+    document.body.appendChild(toast);
+    setTimeout(() => toast.remove(), 2000);
+  });
+}
+
 async function resetPhoto(photoId) {
   if (!confirm('Reset this entry and re-process from scratch?')) return;