feat(portal): add client settings routes and translations

app/portal/settings/language/actions.ts

@@ -0,0 +1,67 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { eq } from "drizzle-orm";
+import { getSqliteConnection } from "@/server/db/client";
+import {
+  clients,
+  instanceI18nSettings,
+  instanceLocales,
+} from "@/server/db/schema";
+import { updateLanguagePreference } from "@/server/settings/preferences";
+import { requirePortalBackend } from "@/server/web/portal";
+
+export async function savePortalLanguagePreferenceAction(language: string) {
+  try {
+    const { actor } = await requirePortalBackend();
+    const preferences = updateLanguagePreference(actor, { language });
+    revalidatePortalSettings();
+    return { success: true, language: preferences.language };
+  } catch (error) {
+    console.error("Portal language preference update failed", error);
+    return { errorKey: "settings.languagePreference.errors.saveFailed" };
+  }
+}
+
+export async function resetPortalLanguagePreferenceAction() {
+  try {
+    const { actor, context } = await requirePortalBackend();
+    const language = readClientAssignedLanguage(context.profile.clientId);
+    const preferences = updateLanguagePreference(actor, { language });
+    revalidatePortalSettings();
+    return { success: true, language: preferences.language };
+  } catch (error) {
+    console.error("Portal language preference reset failed", error);
+    return { errorKey: "settings.portal.language.errors.resetFailed" };
+  }
+}
+
+function readClientAssignedLanguage(clientId: string | null) {
+  const { db } = getSqliteConnection();
+  const defaultLocale = db
+    .select({ defaultLocale: instanceI18nSettings.defaultLocale })
+    .from(instanceI18nSettings)
+    .where(eq(instanceI18nSettings.key, "default"))
+    .get()?.defaultLocale ?? "tr";
+  const portalLocale = clientId
+    ? db
+      .select({ portalLocale: clients.portalLocale })
+      .from(clients)
+      .where(eq(clients.id, clientId))
+      .get()?.portalLocale
+    : null;
+  const candidate = portalLocale ?? defaultLocale;
+  const active = db
+    .select({ code: instanceLocales.code, status: instanceLocales.status })
+    .from(instanceLocales)
+    .where(eq(instanceLocales.code, candidate))
+    .get();
+
+  return active?.status === "active" ? candidate : defaultLocale;
+}
+
+function revalidatePortalSettings() {
+  revalidatePath("/", "layout");
+  revalidatePath("/portal", "layout");
+  revalidatePath("/portal/settings/language");
+}