Location notes: acquire geohash on open (force refresh) and show Matrix loader until block-level geohash resolves; add LocationNotesSheet wrapper

bitchat/Views/ContentView.swift

@@ -1149,13 +1149,12 @@ struct ContentView: View {
                 // Notes icon (mesh only), left of channel badge
                 if case .mesh = locationManager.selectedChannel {
                     Button(action: {
-                        if let block = LocationChannelManager.shared.availableChannels.first(where: { $0.level == .block })?.geohash {
-                            notesGeohash = block
-                            showLocationNotes = true
-                        } else {
-                            notesGeohash = nil
-                            showLocationNotes = true
-                        }
+                        // Kick a one-shot refresh and show the sheet immediately.
+                        LocationChannelManager.shared.enableLocationChannels()
+                        LocationChannelManager.shared.refreshChannels()
+                        // If we already have a block geohash, pass it; otherwise wait in the sheet.
+                        notesGeohash = LocationChannelManager.shared.availableChannels.first(where: { $0.level == .block })?.geohash
+                        showLocationNotes = true
                     }) {
                         Image(systemName: "note.text")
                             .font(.system(size: 12))
@@ -1222,25 +1221,8 @@ struct ContentView: View {
                 .onDisappear { viewModel.isLocationChannelsSheetPresented = false }
         }
         .sheet(isPresented: $showLocationNotes) {
-            if let gh = notesGeohash {
-                LocationNotesView(geohash: gh)
-                    .environmentObject(viewModel)
-            } else {
-                VStack(spacing: 12) {
-                    Text("location unavailable")
-                        .font(.system(size: 16, weight: .bold, design: .monospaced))
-                    Text("enable location to view notes for your street-level area")
-                        .font(.system(size: 12, design: .monospaced))
-                        .foregroundColor(secondaryTextColor)
-                    Button("enable location") {
-                        LocationChannelManager.shared.enableLocationChannels()
-                    }
-                    .buttonStyle(.bordered)
-                }
-                .padding(20)
-                .background(backgroundColor)
-                .foregroundColor(textColor)
-            }
+            LocationNotesSheet(notesGeohash: $notesGeohash)
+                .environmentObject(viewModel)
         }
         .alert("heads up", isPresented: $viewModel.showScreenshotPrivacyWarning) {
             Button("ok", role: .cancel) {}

bitchat/Views/LocationNotesSheet.swift

@@ -0,0 +1,66 @@
+import SwiftUI
+
+struct LocationNotesSheet: View {
+    @EnvironmentObject var viewModel: ChatViewModel
+    @ObservedObject private var locationManager = LocationChannelManager.shared
+    @Binding var notesGeohash: String?
+    @Environment(\.dismiss) private var dismiss
+    @Environment(\.colorScheme) private var colorScheme
+
+    private var backgroundColor: Color { colorScheme == .dark ? .black : .white }
+    private var textColor: Color { colorScheme == .dark ? .green : Color(red: 0, green: 0.5, blue: 0) }
+    private var secondaryTextColor: Color { textColor.opacity(0.8) }
+
+    var body: some View {
+        Group {
+            if let gh = notesGeohash ?? locationManager.availableChannels.first(where: { $0.level == .block })?.geohash {
+                // Found block geohash: show notes view
+                LocationNotesView(geohash: gh)
+                    .environmentObject(viewModel)
+            } else {
+                // Acquire location: keep a loading overlay (Matrix) until we either get a block geohash
+                ZStack {
+                    VStack(spacing: 0) {
+                        HStack {
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text("notes")
+                                    .font(.system(size: 16, weight: .bold, design: .monospaced))
+                                Text("acquiring location…")
+                                    .font(.system(size: 12, design: .monospaced))
+                                    .foregroundColor(secondaryTextColor)
+                            }
+                            Spacer()
+                            Button(action: { dismiss() }) {
+                                Image(systemName: "xmark")
+                                    .font(.system(size: 13, weight: .semibold, design: .monospaced))
+                                    .foregroundColor(textColor)
+                                    .frame(width: 32, height: 32)
+                            }
+                            .buttonStyle(.plain)
+                            .accessibilityLabel("Close")
+                        }
+                        .frame(height: 44)
+                        .padding(.horizontal, 12)
+                        .background(backgroundColor.opacity(0.95))
+                        Spacer()
+                    }
+                    MatrixRainView()
+                        .transition(.opacity)
+                }
+                .background(backgroundColor)
+                .foregroundColor(textColor)
+                .onAppear {
+                    LocationChannelManager.shared.enableLocationChannels()
+                    // Nudge a fresh fix
+                    LocationChannelManager.shared.refreshChannels()
+                }
+                .onChange(of: locationManager.availableChannels) { channels in
+                    if notesGeohash == nil, let block = channels.first(where: { $0.level == .block }) {
+                        notesGeohash = block.geohash
+                    }
+                }
+            }
+        }
+    }
+}
+

bitchat/Views/LocationNotesView.swift

@@ -125,7 +125,7 @@ struct LocationNotesView: View {
 }
 
 // MARK: - Matrix Rain Loader
-private struct MatrixRainView: View {
+struct MatrixRainView: View {
     @Environment(\.colorScheme) var colorScheme
     private var fg: Color { colorScheme == .dark ? Color.green : Color(red: 0, green: 0.5, blue: 0) }
     private let charset = Array("01abcdefghijklmnopqrstuvwxyzｱｲｳｴｵｶｷｸｹｺﾊﾋﾌﾍﾎ0123456789")
@@ -164,7 +164,7 @@ private struct MatrixRainView: View {
     }
 }
 
-private struct RainColumn: View {
+struct RainColumn: View {
     let charset: [Character]
     let columnWidth: CGFloat
     let height: CGFloat