Prevent duplicate approve reviews + redesign bottom bar; bump to 2.9

- Approve: rapid taps fired multiple submitReview calls that each appended a
  review, stacking duplicate entries. Add a busy guard (skip while one is in
  flight) and dedupe reviews per user so the latest replaces earlier ones;
  disable the review menu while submitting.
- Bottom bar: replace the full-width bar with a floating frosted-glass pill
  inset from the edges (like SideStore), with a highlighted capsule behind
  the active tab. Bump to 2.9.

GiteaPR.xcodeproj/project.pbxproj

@@ -187,7 +187,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 19;
+				CURRENT_PROJECT_VERSION = 20;
 				DEVELOPMENT_TEAM = "";
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_CFBundleDisplayName = "GiteaPR";
@@ -197,7 +197,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 2.8;
+				MARKETING_VERSION = 2.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.bueso.giteapr;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -211,7 +211,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 19;
+				CURRENT_PROJECT_VERSION = 20;
 				DEVELOPMENT_TEAM = "";
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_CFBundleDisplayName = "GiteaPR";
@@ -221,7 +221,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 2.8;
+				MARKETING_VERSION = 2.9;
 				PRODUCT_BUNDLE_IDENTIFIER = com.bueso.giteapr;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;

GiteaPR/Detail/PRDetailView.swift

@@ -102,7 +102,11 @@ struct PRDetailView: View {
         .toolbar {
             if prIsOpen {
                 ToolbarItem(placement: .primaryAction) { mergeButton }
-                ToolbarItem(placement: .primaryAction) { reviewMenu }
+                ToolbarItem(placement: .primaryAction) {
+                    // Disable while a review submission is in flight so rapid
+                    // taps can't stack duplicate reviews.
+                    reviewMenu.disabled(vm.busyMessage != nil)
+                }
             }
         }
     }
@@ -130,29 +134,43 @@ struct PRDetailView: View {
         .background(Color(.secondarySystemBackground))
     }
 
-    /// Bottom tab bar: full-width frosted-glass bar at the standard iOS tab
-    /// bar height, sitting flush above the home indicator — matching Apple
-    /// Music's tab bar (not a floating capsule with space below it).
+    /// Bottom tab bar: a floating, frosted-glass pill inset from the screen
+    /// edges (like the SideStore tab bar), with a highlighted capsule behind
+    /// the active tab. Icon + text per tab.
     private var bottomTabBar: some View {
-        HStack {
+        HStack(spacing: 4) {
             ForEach(DetailTab.allCases) { tab in
                 Button {
                     selectedTab = tab
                 } label: {
                     VStack(spacing: 2) {
                         Image(systemName: tab.icon)
-                            .font(.system(size: 22))
+                            .font(.system(size: 20, weight: .medium))
                         Text(tab.rawValue)
-                            .font(.caption2)
+                            .font(.caption2.weight(.medium))
                     }
                     .foregroundColor(selectedTab == tab ? .accentColor : .secondary)
                     .frame(maxWidth: .infinity)
+                    .padding(.vertical, 6)
+                    .background(
+                        selectedTab == tab
+                            ? AnyShapeStyle(.ultraThinMaterial)
+                            : AnyShapeStyle(.clear)
+                    )
+                    .clipShape(Capsule())
                 }
+                .buttonStyle(.plain)
             }
         }
-        .padding(.top, 8)
-        .padding(.bottom, 4)
-        .background(.bar)
+        .padding(.horizontal, 6)
+        .padding(.vertical, 6)
+        .background(
+            Capsule()
+                .fill(.regularMaterial)
+                .shadow(color: .black.opacity(0.15), radius: 10, y: 4)
+        )
+        .padding(.horizontal, 20)
+        .padding(.bottom, 8)
     }
 
     private var reviewMenu: some View {

GiteaPR/Detail/PRDetailViewModel.swift

@@ -113,12 +113,20 @@ final class PRDetailViewModel: ObservableObject {
 
     func submitReview(state: String, comment: String?) async {
         guard let client = SettingsStore.shared.client() else { return }
+        // Guard against concurrent submissions: rapid taps on Approve used to
+        // fire several requests that each appended a review, stacking
+        // duplicate entries. Skip if one is already in flight.
+        guard busyMessage == nil else { return }
         busyMessage = "Submitting…"
         defer { busyMessage = nil }
         do {
             let r = try await client.submitReview(owner: owner, repo: repo.name,
                                                   number: prNumber, state: state,
                                                   comment: comment)
+            // A user's latest review replaces their earlier ones (Gitea stores
+            // one review per user per PR). Drop any prior review by this user
+            // so we don't render duplicates.
+            reviews.removeAll { $0.user?.login == r.user?.login }
             reviews.append(r)
         } catch {
             errorMessage = error.localizedDescription