feat(i18n): add bulk AI translation for all languages

Add "Translate All (AI)" button to pages language settings that translates all configured languages in one operation. Shows success/partial success messages with counts. Adds locale keys for all 29 languages. Also removes trailing newlines from locale files for consistency.

routers/web/pages/pages.go

@@ -1070,6 +1070,8 @@ func deepMergeConfig(base *pages_module.LandingConfig, overrideJSON string) (*pa
 }
 
 // deepMerge recursively merges src into dst.
+// Maps are merged recursively; arrays are merged element-wise (preserving
+// base fields like icons that the translation overlay may omit).
 func deepMerge(dst, src map[string]any) map[string]any {
 	for key, srcVal := range src {
 		if dstVal, ok := dst[key]; ok {
@@ -1080,12 +1082,47 @@ func deepMerge(dst, src map[string]any) map[string]any {
 				dst[key] = deepMerge(dstMap, srcMap)
 				continue
 			}
+			// Both are arrays: merge element-wise
+			srcArr, srcIsArr := srcVal.([]any)
+			dstArr, dstIsArr := dstVal.([]any)
+			if srcIsArr && dstIsArr {
+				dst[key] = deepMergeArrays(dstArr, srcArr)
+				continue
+			}
 		}
 		dst[key] = srcVal
 	}
 	return dst
 }
 
+// deepMergeArrays merges two arrays element-wise. For each index, if both
+// elements are maps, they are deep-merged (so translation fields override
+// base fields while preserving untranslated fields like icons). Otherwise
+// the source element replaces the base.
+func deepMergeArrays(dst, src []any) []any {
+	result := make([]any, max(len(dst), len(src)))
+	for i := range result {
+		if i < len(src) && i < len(dst) {
+			srcMap, srcIsMap := src[i].(map[string]any)
+			dstMap, dstIsMap := dst[i].(map[string]any)
+			if srcIsMap && dstIsMap {
+				merged := make(map[string]any)
+				for k, v := range dstMap {
+					merged[k] = v
+				}
+				result[i] = deepMerge(merged, srcMap)
+			} else {
+				result[i] = src[i]
+			}
+		} else if i < len(src) {
+			result[i] = src[i]
+		} else {
+			result[i] = dst[i]
+		}
+	}
+	return result
+}
+
 // detectPageLanguage determines the active language for a landing page.
 // Priority: ?lang= query param > pages_lang cookie > Accept-Language header > default.
 func detectPageLanguage(ctx *context.Context, config *pages_module.LandingConfig) string {

routers/web/repo/setting/pages.go

@@ -1305,6 +1305,57 @@ func PagesLanguagesPost(ctx *context.Context) {
 			}
 		}
 		ctx.Flash.Success(ctx.Tr("repo.settings.pages.ai_translate_success"))
+
+	case "ai_translate_all":
+		defaultLang := config.I18n.DefaultLang
+		if defaultLang == "" {
+			defaultLang = "en"
+		}
+		var successCount, failCount int
+		for _, lang := range config.I18n.Languages {
+			if lang == defaultLang {
+				continue
+			}
+			translated, err := pages_service.TranslateLandingPageContent(ctx, ctx.Repo.Repository, config, lang)
+			if err != nil {
+				log.Error("AI translation failed for %s: %v", lang, err)
+				failCount++
+				continue
+			}
+			existing, err := pages_model.GetTranslation(ctx, ctx.Repo.Repository.ID, lang)
+			if err != nil {
+				log.Error("GetTranslation failed for %s: %v", lang, err)
+				failCount++
+				continue
+			}
+			if existing != nil {
+				existing.ConfigJSON = translated
+				existing.AutoGenerated = true
+				if err := pages_model.UpdateTranslation(ctx, existing); err != nil {
+					log.Error("UpdateTranslation failed for %s: %v", lang, err)
+					failCount++
+					continue
+				}
+			} else {
+				t := &pages_model.Translation{
+					RepoID:        ctx.Repo.Repository.ID,
+					Lang:          lang,
+					ConfigJSON:    translated,
+					AutoGenerated: true,
+				}
+				if err := pages_model.CreateTranslation(ctx, t); err != nil {
+					log.Error("CreateTranslation failed for %s: %v", lang, err)
+					failCount++
+					continue
+				}
+			}
+			successCount++
+		}
+		if failCount == 0 {
+			ctx.Flash.Success(ctx.Tr("repo.settings.pages.ai_translate_all_success", successCount))
+		} else {
+			ctx.Flash.Warning(ctx.Tr("repo.settings.pages.ai_translate_all_partial", successCount, successCount+failCount, failCount))
+		}
 	}
 
 	ctx.Redirect(ctx.Repo.Repository.Link() + "/settings/pages/languages")