feat: OCR auto-saves GPS to asset + MSFS enrichment in detail view

OCR endpoint (/api/ocr) now auto-saves EXIF GPS from the photo
to the asset's latitude/longitude fields when they are blank,
so the first photo scan at a machine permanently records its location.

GET /api/assets/{id} now includes an 'msfs' block enriched from
the merged Dynamics 365 Field Service data (merged-assets.json)
loaded at server start (1,834 matched assets). Fields shown:
equipment_id, connect_id, compass_asset_number, manufacturer,
model_text, dex_model, install_date, software_version, etc.

Frontend updates:
- New 'Field Service Data' card in asset detail view when MSFS
  data is available (manufacturer, Connect ID, install date, etc.)
- '📍 GPS saved to asset' confirmation shown after OCR auto-save
- AppState.ocrGpsSaved flag to track the auto-save event

static/index.html

@@ -1309,6 +1309,12 @@
         <div id="detailSEFields"></div>
       </div>
 
+      <!-- MSFS Data (Dynamics 365 Field Service enrichment) -->
+      <div class="card" id="detailMsfsCard" style="display:none;">
+        <div class="card-title">📊 Field Service Data</div>
+        <div id="detailMsfsFields"></div>
+      </div>
+
       <!-- Check-in History -->
       <div class="card">
         <div class="card-title">Check-in History <span id="checkinCount" style="color:var(--accent2);"></span></div>
@@ -1688,6 +1694,7 @@
       gpsAcc: null,
       currentTab: 'tabAddAsset',
       currentAssetId: null,
+      ocrGpsSaved: false,      // true when OCR photo GPS was auto-saved to asset
     };
 
     function isLoggedIn() { return !!AppState.authToken; }
@@ -2773,6 +2780,9 @@
         }
         showToast('📍 GPS extracted from photo: ' + data.exif_gps.lat.toFixed(6) + ', ' + data.exif_gps.lng.toFixed(6));
       }
+      if (data.gps_saved) {
+        AppState.ocrGpsSaved = true;
+      }
     }
 
     // ── OCR: Auto-search asset by machine_id ─────────────────────────────
@@ -2793,6 +2803,10 @@
           doAutoCheckin(asset.id);
           el.innerHTML += `<div style="margin-top:8px;font-size:12px;color:var(--green);">✓ Auto check-in recorded</div>`;
         }
+        if (AppState.ocrGpsSaved) {
+          el.innerHTML += `<div style="margin-top:8px;font-size:12px;color:var(--green);">📍 GPS saved to asset</div>`;
+          AppState.ocrGpsSaved = false;
+        }
         el.innerHTML += `<div style="margin-top:8px;">
           <button class="btn btn-outline btn-sm" onclick="switchTab('tabAssets');viewAsset(${asset.id});" style="width:100%;">View Details</button>
         </div>`;
@@ -3791,6 +3805,35 @@
         // Service Entrances
         await loadServiceEntrances(a);
 
+        // MSFS Data (Dynamics 365 enrichment)
+        const msfsCard = document.getElementById('detailMsfsCard');
+        const msfsFields = document.getElementById('detailMsfsFields');
+        if (a.msfs) {
+          const m = a.msfs;
+          const msfsRows = [
+            df('Equipment ID',    m.equipment_id, true),
+            df('Connect ID',      m.connect_id, true),
+            df('Compass #',       m.compass_asset_number, true),
+            df('Manufacturer',    m.manufacturer),
+            df('Model',           m.model_text),
+            df('DEX Model',       m.dex_model),
+            df('Canteen Connect GUID', m.canteen_connect_guid, true),
+            df('Account Name',    m.account_name),
+            df('Install Date',    m.install_date),
+            df('Manufacture Date', m.manufacture_date),
+            df('Software Version', m.software_version, true),
+            df('Work Orders',     m.work_order_count ? `${m.work_order_count} work orders` : null),
+          ].filter(Boolean).join('');
+          if (msfsRows) {
+            msfsFields.innerHTML = msfsRows;
+            msfsCard.style.display = 'block';
+          } else {
+            msfsCard.style.display = 'none';
+          }
+        } else {
+          msfsCard.style.display = 'none';
+        }
+
         await loadCheckinHistory(id);
       } catch (e) {
         showToast(e.message, true);