fix(phase26): batch geocode endpoint for faster server trip scrubber

server/app.py

@@ -566,6 +566,30 @@ def geocode():
     return jsonify(name=None), 204
 
 
+@app.post("/api/geocode/batch")
+@require_login
+def geocode_batch():
+    """Batch geocode — returns {key: label} for all unique coords in one request."""
+    body = request.get_json(silent=True) or {}
+    coords = body.get("coords")
+    if not isinstance(coords, list) or not coords:
+        return jsonify(error="expected {coords: [{lat, lon}, ...]}"), 400
+    result = {}
+    for item in coords:
+        try:
+            lat = float(item["lat"])
+            lon = float(item["lon"])
+        except (KeyError, ValueError, TypeError):
+            continue
+        lat4 = int(round(lat, 4) * 10000)
+        lon4 = int(round(lon, 4) * 10000)
+        key = f"{lat:.3f},{lon:.3f}"
+        name = _geocode_cached(lat4, lon4)
+        if name:
+            result[key] = name
+    return jsonify(result)
+
+
 # ── Uplink trigger (recompute trips after new batch) ──────────────────────
 
 @app.post("/api/v1/portal/recompute-trips")