Add English localization (device-language based)

Add English as an overlay localization following the device language,
keeping Simplified Chinese as the base/development language. Untranslated
strings fall back to Chinese automatically.

- project.yml: set developmentLanguage zh-Hans and knownRegions (zh-Hans/en/Base)
- Resources/en.lproj/{Localizable,InfoPlist}.strings: ~230 English strings
- Resources/zh-Hans.lproj/InfoPlist.strings: Chinese permission prompts
- Restructure ternary Text/Label and String-typed UI messages so they
  localize (String(localized:), LocalizedStringKey helper params); replace
  a .contains("通过") success check with a dedicated flag
- Localize user-facing model/coordinator/error messages across App and Shared

Internal RuntimeLogger logs and diagnostic/report bodies remain in Chinese.

App/MapHomeView.swift

@@ -301,7 +301,7 @@ struct MapHomeView: View {
             }
         } message: {
             Text(
-                "你正在使用 \(communityContributionClient?.name ?? "第三方客户端")。点击“去提交”会先复制投稿模板，并在 App 内打开社区页面。采纳后将收录到 README，可选择是否匿名署名。"
+                "你正在使用 \(communityContributionClient?.name ?? String(localized: "第三方客户端"))。点击“去提交”会先复制投稿模板，并在 App 内打开社区页面。采纳后将收录到 README，可选择是否匿名署名。"
             )
         }
         .alert("已复制投稿模板", isPresented: $showCommunityTemplateCopied) {
@@ -483,7 +483,7 @@ struct MapHomeView: View {
             // 当前选点
             HStack {
                 VStack(alignment: .leading, spacing: 3) {
-                    Text(mapState.displayName ?? "当前选点").font(.subheadline.weight(.semibold)).lineLimit(1)
+                    Text(mapState.displayName ?? String(localized: "当前选点")).font(.subheadline.weight(.semibold)).lineLimit(1)
                     coordinateRow(label: "GCJ-02(国内)", system: .gcj02)
                     coordinateRow(label: "WGS-84(国际)", system: .wgs84)
                 }
@@ -496,7 +496,7 @@ struct MapHomeView: View {
                         activeTip = .deactivation
                     }
                 } label: {
-                    Text(spoofState == .active ? "无法生效？" : "无法取消？")
+                    (spoofState == .active ? Text("无法生效？") : Text("无法取消？"))
                         .font(.system(size: 10, weight: .medium))
                         .foregroundStyle(.secondary)
                         .padding(.horizontal, 8)
@@ -520,7 +520,7 @@ struct MapHomeView: View {
                 .buttonStyle(.plain)
                 .foregroundStyle(favorites.selectedFavoriteID != nil ? .orange : .gray)
                 .disabled(favoriteSaveTask != nil)
-                .accessibilityLabel(favorites.selectedFavoriteID != nil ? "已收藏，点击取消收藏" : "收藏当前选点")
+                .accessibilityLabel(favorites.selectedFavoriteID != nil ? Text("已收藏，点击取消收藏") : Text("收藏当前选点"))
             }
             // 收藏
             if favorites.favorites.isEmpty {
@@ -537,7 +537,7 @@ struct MapHomeView: View {
                         if spoofState == .verifying {
                             ProgressView().tint(.white)
                         }
-                        Text(spoofState == .active && needsSwitchButton ? "关闭" : buttonTitle)
+                        (spoofState == .active && needsSwitchButton ? Text("关闭") : Text(buttonTitle))
                             .font(.headline).lineLimit(1)
                     }
                     .frame(maxWidth: needsSwitchButton ? nil : .infinity)
@@ -585,15 +585,15 @@ struct MapHomeView: View {
     private var buttonTitle: String {
         if runtimeMode.mode == .thirdParty {
             switch spoofState {
-            case .idle: return "同步到第三方代理"
-            case .verifying: return "检测并同步中…"
-            case .active: return "停止第三方虚拟定位"
+            case .idle: return String(localized: "同步到第三方代理")
+            case .verifying: return String(localized: "检测并同步中…")
+            case .active: return String(localized: "停止第三方虚拟定位")
             }
         }
         switch spoofState {
-        case .idle: return "开始虚拟定位"
-        case .verifying: return "验证环境中…"
-        case .active: return "停止虚拟定位"
+        case .idle: return String(localized: "开始虚拟定位")
+        case .verifying: return String(localized: "验证环境中…")
+        case .active: return String(localized: "停止虚拟定位")
         }
     }
 
@@ -856,7 +856,7 @@ struct MapHomeView: View {
     }
 
     private func coordinateRow(
-        label: String,
+        label: LocalizedStringKey,
         system: CoordinateConverter.MapCoordinateSystem
     ) -> some View {
         let coordinate = currentSelectionPair.coordinate(for: system)
@@ -1091,7 +1091,7 @@ struct MapHomeView: View {
                         "请求动作": "WLOC query",
                         "错误": response.error ?? "未知错误"
                     ])
-                    setup.requestThirdPartySetup(message: response.error ?? "第三方代理查询失败")
+                    setup.requestThirdPartySetup(message: response.error ?? String(localized: "第三方代理查询失败"))
                 }
             } catch {
                 spoofState = .idle
@@ -1144,7 +1144,7 @@ struct MapHomeView: View {
                     "Wi-Fi接口": String(net.isWiFiEnabled)
                 ])
                 activeTip = nil
-                setup.requestSetup(message: "当前未连接可用的 Wi-Fi，请连接 Wi-Fi 后配置 127.0.0.1:8888 手动代理。")
+                setup.requestSetup(message: String(localized: "当前未连接可用的 Wi-Fi，请连接 Wi-Fi 后配置 127.0.0.1:8888 手动代理。"))
                 return
             }
 
@@ -1517,7 +1517,7 @@ struct MapHomeView: View {
                 }
                 searchResults = (response?.mapItems ?? []).prefix(6).map { item in
                     let r = SearchLocationResult(
-                        name: item.name ?? "未命名",
+                        name: item.name ?? String(localized: "未命名"),
                         subtitle: [item.placemark.locality, item.placemark.subLocality, item.placemark.thoroughfare]
                             .compactMap { $0 }
                             .filter { !$0.isEmpty }
@@ -1529,7 +1529,7 @@ struct MapHomeView: View {
                     ])
                     return r
                 }
-                if searchResults.isEmpty { searchError = "没有找到相关地点" }
+                if searchResults.isEmpty { searchError = String(localized: "没有找到相关地点") }
             }
         }
     }