Remove in-list spinner + add monitored-repos setting; bump to 2.3

- Remove the in-list loading wheel overlay; the landing page just shows the
  cached list or the 'No open PRs' screen.
- Add a 'Monitored repos' setting (Settings > Inbox) that limits the inbox to
  specific repos, cutting the number of API calls dramatically. Empty =
  monitor all accessible repos. Bump to 2.3.

GiteaPR/Settings/MonitoredReposView.swift

@@ -0,0 +1,84 @@
+import SwiftUI
+
+/// Lets the user pick which repos the inbox monitors. Fetches the accessible
+/// repos from the API and shows a toggle per repo. Empty selection = monitor
+/// all.
+struct MonitoredReposView: View {
+    @Binding var selection: [String]
+    @State private var repos: [Repository] = []
+    @State private var isLoading = true
+    @State private var errorMessage: String?
+
+    var body: some View {
+        Group {
+            if isLoading {
+                ProgressView("Loading repos…")
+            } else if let errorMessage {
+                ContentUnavailableView("Couldn't load repos",
+                                       systemImage: "exclamationmark.triangle",
+                                       description: Text(errorMessage))
+            } else {
+                List {
+                    Section {
+                        Button {
+                            selection = []
+                        } label: {
+                            HStack {
+                                Text("Monitor all repos")
+                                Spacer()
+                                if selection.isEmpty {
+                                    Image(systemName: "checkmark")
+                                        .foregroundColor(.accentColor)
+                                }
+                            }
+                        }
+                    }
+                    Section("Monitored") {
+                        ForEach(repos) { repo in
+                            Button {
+                                toggle(repo.fullName)
+                            } label: {
+                                HStack {
+                                    Text(repo.fullName)
+                                        .foregroundColor(.primary)
+                                    Spacer()
+                                    if selection.contains(repo.fullName) {
+                                        Image(systemName: "checkmark")
+                                            .foregroundColor(.accentColor)
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        .navigationTitle("Monitored repos")
+        .navigationBarTitleDisplayMode(.inline)
+        .task { await load() }
+    }
+
+    private func load() async {
+        isLoading = true
+        errorMessage = nil
+        defer { isLoading = false }
+        guard let client = SettingsStore.shared.client() else {
+            errorMessage = "Not configured."
+            return
+        }
+        do {
+            repos = try await client.repos()
+                .sorted { $0.fullName < $1.fullName }
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+
+    private func toggle(_ fullName: String) {
+        if selection.contains(fullName) {
+            selection.removeAll { $0 == fullName }
+        } else {
+            selection.append(fullName)
+        }
+    }
+}