fix(styles): resolve style captions through in-app language

Style card descriptions were passed to Text as raw String keys, so they
never went through AppL10n. Resolve them (and the editor title) with the
in-app UI language override, matching the rest of the host app.

Co-authored-by: Rocky <hkgood@users.noreply.github.com>

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- **Style card captions**: resolve each built-in style’s short description through the in-app language override, so switching App Language updates the caption instead of showing a localization key or the system language. / **风格卡片说明**：内置风格的说明小字改为走应用内语言设置；切换 App 语言后说明会跟着变，而不再显示本地化 key 或跟随系统语言。
+
 ## [2.2.0] - 2026-09-18
 
 ### Added

OSGKeyboard/Views/PersonalReplyStyleSection.swift

@@ -196,9 +196,11 @@ struct PersonalReplyStyleSection: View {
                         Image(systemName: "arrow.clockwise")
                     }
                     Text(
-                        isGenerating
+                        AppL10n.string(
-                            ? "personalReplyStyle.regenerating"
+                            isGenerating
-                            : "personalReplyStyle.regenerate"
+                                ? "personalReplyStyle.regenerating"
+                                : "personalReplyStyle.regenerate"
+                        )
                     )
                 }
                 .font(TypeStyle.bodyEmph)

OSGKeyboard/Views/PolishStylesView.swift

@@ -169,7 +169,10 @@ struct PolishStylesView: View {
                         .foregroundStyle(palette.textPrimary)
                         .lineLimit(1)
                         .padding(.trailing, 32)
-                    Text(descriptionKey(for: pack))
+                    // AppL10n honors Settings → App Language; Text(String) would
+                    // show the raw key, and a bare LocalizedStringKey would follow
+                    // the system language instead (see Scripts/check_l10n_keys.sh).
+                    Text(AppL10n.string(descriptionKey(for: pack), language: config.uiLanguage))
                         .font(TypeStyle.caption2)
                         .foregroundStyle(palette.textTertiary)
                         .lineLimit(2)
@@ -229,19 +232,11 @@ struct PolishStylesView: View {
         }
     }
 
+    /// Host-bundle caption keys. Resolved at the render site with `AppL10n`
+    /// so Settings → App Language wins over the launch-time system locale.
     private func descriptionKey(for pack: PolishStylePack) -> String {
         guard pack.kind == .builtin else { return "polishStyles.custom.description" }
-        switch pack.id {
+        return "polishStyles.\(pack.id.dropFirst("builtin.".count)).description"
-        case "builtin.structured": return "polishStyles.structured.description"
-        case "builtin.formal": return "polishStyles.formal.description"
-        case "builtin.dating": return "polishStyles.dating.description"
-        case "builtin.chat": return "polishStyles.chat.description"
-        case "builtin.flex": return "polishStyles.flex.description"
-        case "builtin.corp": return "polishStyles.corp.description"
-        case "builtin.diba": return "polishStyles.diba.description"
-        case "builtin.xhs": return "polishStyles.xhs.description"
-        default: return "polishStyles.light.description"
-        }
     }
 
     private func reload() {
@@ -464,7 +459,9 @@ struct PolishStyleEditorSheet: View {
                     Text(AppL10n.string("polishStyles.editor.hint"))
                 }
             }
-            .navigationTitle(isNew ? "polishStyles.add" : "polishStyles.edit")
+            .navigationTitle(
+                AppL10n.string(isNew ? "polishStyles.add" : "polishStyles.edit")
+            )
             .navigationBarTitleDisplayMode(.inline)
             .toolbar {
                 ToolbarItem(placement: .cancellationAction) {

OSGKeyboardTests/PolishStylesL10nTests.swift

@@ -0,0 +1,26 @@
+// PolishStylesL10nTests.swift
+// OSGKeyboard · Tests
+//
+// Style-card captions live in the host Localizable.strings table and must be
+// resolved through AppL10n so the in-app language override wins.
+
+@testable import OSGKeyboard
+@testable import OSGKeyboardShared
+import XCTest
+
+final class PolishStylesL10nTests: XCTestCase {
+    func testBuiltinStyleCardDescriptionsHonorInAppLanguage() {
+        let slugs = PolishStylePackCatalog.builtins.map {
+            String($0.id.dropFirst("builtin.".count))
+        } + ["custom"]
+
+        for slug in slugs {
+            let key = "polishStyles.\(slug).description"
+            let english = AppL10n.string(key, language: .english)
+            let chinese = AppL10n.string(key, language: .chinese)
+            XCTAssertNotEqual(english, key, "missing English copy for \(key)")
+            XCTAssertNotEqual(chinese, key, "missing Chinese copy for \(key)")
+            XCTAssertNotEqual(english, chinese, "\(key) is not bilingual")
+        }
+    }
+}