move buttons to fake bottom bar

lib/dev_config.dart

@@ -10,12 +10,20 @@ const double kTileEstimateKb = 25.0;
 const double kDirectionConeHalfAngle = 20.0; // degrees
 const double kDirectionConeBaseLength = 0.0012; // multiplier
 
+// Margin (bottom) for positioning the floating bottom button bar
+const double kBottomButtonBarMargin = 4.0;
+
+// Map overlay (attribution, scale bar, zoom) vertical offset from bottom edge
+const double kAttributionBottomOffset = 110.0;
+const double kZoomIndicatorBottomOffset = 142.0;
+const double kScaleBarBottomOffset = 170.0;
+
 // Add Camera pin vertical offset (for pin tip to match coordinate on map)
 const double kAddPinYOffset = -16.0;
 
 // Client name and version for OSM uploads ("created_by" tag)
 const String kClientName = 'FlockMap';
-const String kClientVersion = '0.8.1';
+const String kClientVersion = '0.8.2';
 
 // Marker/camera interaction
 const int kCameraMinZoomLevel = 10; // Minimum zoom to show cameras or warning

lib/screens/home_screen.dart

@@ -59,38 +59,66 @@ class _HomeScreenState extends State<HomeScreen> {
             ),
           ],
         ),
-        body: MapView(
-          controller: _mapController,
-          followMe: _followMe,
-          onUserGesture: () {
-            if (_followMe) setState(() => _followMe = false);
-          },
+        body: Stack(
+          children: [
+            MapView(
+              controller: _mapController,
+              followMe: _followMe,
+              onUserGesture: () {
+                if (_followMe) setState(() => _followMe = false);
+              },
+            ),
+            Align(
+              alignment: Alignment.bottomCenter,
+              child: Padding(
+                padding: EdgeInsets.only(
+                  bottom: MediaQuery.of(context).padding.bottom + kBottomButtonBarMargin,
+                  left: 8,
+                  right: 8,
+                ),
+                child: Container(
+                  decoration: BoxDecoration(
+                    color: Colors.white,
+                    borderRadius: BorderRadius.circular(16),
+                    boxShadow: [BoxShadow(color: Colors.black26, blurRadius: 10, offset: Offset(0, -2))],
+                  ),
+                  margin: EdgeInsets.only(bottom: kBottomButtonBarMargin),
+                  padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+                  child: Row(
+                    children: [
+                      Expanded(
+                        child: ElevatedButton.icon(
+                          icon: Icon(Icons.add_location_alt),
+                          label: Text('Tag Camera'),
+                          onPressed: _openAddCameraSheet,
+                          style: ElevatedButton.styleFrom(
+                            minimumSize: Size(0, 48),
+                            textStyle: TextStyle(fontSize: 16),
+                          ),
+                        ),
+                      ),
+                      SizedBox(width: 12),
+                      Expanded(
+                        child: ElevatedButton.icon(
+                          icon: Icon(Icons.download_for_offline),
+                          label: Text('Download'),
+                          onPressed: () => showDialog(
+                            context: context,
+                            builder: (ctx) => DownloadAreaDialog(controller: _mapController),
+                          ),
+                          style: ElevatedButton.styleFrom(
+                            minimumSize: Size(0, 48),
+                            textStyle: TextStyle(fontSize: 16),
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+            ),
+          ],
         ),
-        floatingActionButton: appState.session == null
-            ? Column(
-                mainAxisSize: MainAxisSize.min,
-                crossAxisAlignment: CrossAxisAlignment.end,
-                children: [
-                  FloatingActionButton.extended(
-                    onPressed: _openAddCameraSheet,
-                    icon: const Icon(Icons.add_location_alt),
-                    label: const Text('Tag Camera'),
-                    heroTag: 'tag_camera_fab',
-                  ),
-                  const SizedBox(height: 12),
-                  FloatingActionButton.extended(
-                    onPressed: () => showDialog(
-                      context: context,
-                      builder: (ctx) => DownloadAreaDialog(controller: _mapController),
-                    ),
-                    icon: const Icon(Icons.download_for_offline),
-                    label: const Text('Download'),
-                    heroTag: 'download_fab',
-                  ),
-                ],
-              )
-            : null,
-        floatingActionButtonLocation: FloatingActionButtonLocation.endFloat,
       ),
     );
   }

lib/widgets/map_view.dart

@@ -311,7 +311,7 @@ class _MapViewState extends State<MapView> {
             // Built-in scale bar from flutter_map 
             Scalebar(
               alignment: Alignment.bottomLeft,
-              padding: EdgeInsets.only(left: 8, bottom: 54), // above attribution
+              padding: EdgeInsets.only(left: 8, bottom: kScaleBarBottomOffset), // from dev_config
               textStyle: TextStyle(color: Colors.black, fontWeight: FontWeight.bold),
               lineColor: Colors.black,
               strokeWidth: 3,
@@ -353,7 +353,7 @@ class _MapViewState extends State<MapView> {
         // Zoom indicator, positioned above scale bar
         Positioned(
           left: 10,
-          bottom: 92,
+          bottom: kZoomIndicatorBottomOffset,
           child: Container(
             padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 2),
             decoration: BoxDecoration(
@@ -377,7 +377,7 @@ class _MapViewState extends State<MapView> {
         ),
         // Attribution overlay
         Positioned(
-          bottom: 20,
+          bottom: kAttributionBottomOffset,
           left: 10,
           child: Container(
             color: Colors.white70,