feat: Kisani UI overhaul — brand identity, gallery, visual polish

- Rename app to Kisani (CFBundleDisplayName, xcodeproj → Kisani.xcodeproj)
- BackupView: kisani. wordmark + SwiftUI-drawn server logo mark (no asset,
  adaptive ink/bg), 206pt progress ring with active-state glow, 4-page
  swipeable ring (progress/pending/failed/uploaded), 4-metric stats strip,
  friendly NAS card (Home Server label), hamburger → AppMenuView sheet
- GalleryView: new NAS + local photo grid with source picker chip, 3-col
  lazy grid, ThumbnailCache, sync-status dots (green = backed up)
- MainTabView: Browse tab → Gallery tab; tab bar uses ultraThinMaterial
  blur background (systemGray3 icons, 9.5pt labels)
- All app icon sizes regenerated from 1024pt source via sips
- LANMonitor: nasReachable Bool?, checkNASReachability(host:port:) TCP ping
- project.yml: photo library usage description updated to Kisani branding

Co-Authored-By: Kutesir <kutesir@provoc.ug>
Co-Authored-By: Sentry <sentry@provoc.ug>

Features/MainTabView.swift

@@ -27,20 +27,34 @@ struct iPhoneTabLayout: View {
             NavigationStack { BackupView() }
                 .tabItem { Label("Backup", systemImage: "arrow.up.doc.fill") }
 
+            NavigationStack { GalleryView() }
+                .tabItem { Label("Gallery", systemImage: "photo.on.rectangle") }
+
             NavigationStack { SyncView() }
                 .tabItem { Label("Sync", systemImage: "arrow.triangle.2.circlepath") }
 
-            NavigationStack {
-                if let conn = ConnectionStore.shared.savedConnection {
-                    BrowseView(connection: conn, selectedPath: .constant("/"))
-                }
-            }
-            .tabItem { Label("Browse", systemImage: "folder.fill") }
-
             NavigationStack { SettingsView() }
                 .tabItem { Label("Settings", systemImage: "gearshape.fill") }
         }
         .tint(AppTheme.ink)
+        .onAppear {
+            let appearance = UITabBarAppearance()
+            // Native iOS blur — feels lighter than opaque white, more premium
+            appearance.configureWithDefaultBackground()
+            appearance.backgroundEffect = UIBlurEffect(style: .systemUltraThinMaterial)
+            appearance.shadowColor = UIColor.separator.withAlphaComponent(0.4)
+
+            let itemAppearance = UITabBarItemAppearance()
+            itemAppearance.normal.iconColor = UIColor.systemGray3
+            itemAppearance.normal.titleTextAttributes = [
+                .font: UIFont.systemFont(ofSize: 9.5, weight: .regular),
+                .foregroundColor: UIColor.systemGray3
+            ]
+            appearance.stackedLayoutAppearance = itemAppearance
+
+            UITabBar.appearance().standardAppearance = appearance
+            UITabBar.appearance().scrollEdgeAppearance = appearance
+        }
     }
 }
 
@@ -51,8 +65,8 @@ struct iPadSidebarLayout: View {
         NavigationSplitView {
             List(selection: $selection) {
                 Label("Backup", systemImage: "arrow.up.doc.fill").tag("backup")
+                Label("Gallery", systemImage: "photo.on.rectangle").tag("browse")
                 Label("Sync", systemImage: "arrow.triangle.2.circlepath").tag("sync")
-                Label("Browse", systemImage: "folder.fill").tag("browse")
                 Label("Settings", systemImage: "gearshape.fill").tag("settings")
             }
             .navigationTitle("Kisani")
@@ -60,10 +74,7 @@ struct iPadSidebarLayout: View {
             switch selection {
             case "backup":  BackupView()
             case "sync":    SyncView()
-            case "browse":
-                if let conn = ConnectionStore.shared.savedConnection {
-                    BrowseView(connection: conn, selectedPath: .constant("/"))
-                }
+            case "browse":  GalleryView()
             case "settings": SettingsView()
             default: BackupView()
             }