feat(i18n): implement dynamic system wording management

Add database schema and API endpoints for system wording keys and values
Replace hardcoded translations in frontend and backend with dynamic messages
Add System Wordings management interface to Admin view

frontend/Dockerfile

@@ -1,8 +1,10 @@
 FROM node:22-alpine
 
-WORKDIR /app
-COPY package.json ./
+WORKDIR /app/frontend
+COPY frontend/package.json ./
 RUN corepack enable && pnpm install
-COPY . .
+COPY frontend/. .
+COPY package.json /app/package.json
+COPY system-wordings.ts /app/system-wordings.ts
 EXPOSE 3000
 CMD ["pnpm", "run", "dev"]