Add 2026 theme build and retrieval timeline

Dockerfile

@@ -18,6 +18,15 @@ RUN echo "$FRONTEND_CACHE_BUST" >/tmp/frontend-cache-bust && \
     pnpm install --frozen-lockfile --prod=false && \
     pnpm run build
 
+# 克隆并构建 2026 主题
+ARG FRONTEND_2026_REPO=https://git.orionc.me/orion/FileCodeBoxFronted2026.git
+ARG FRONTEND_2026_BRANCH=main
+RUN echo "$FRONTEND_CACHE_BUST" >/tmp/frontend-2026-cache-bust && \
+    git clone --depth 1 --branch "$FRONTEND_2026_BRANCH" "$FRONTEND_2026_REPO" /build/fronted-2026 && \
+    cd /build/fronted-2026 && \
+    pnpm install --frozen-lockfile --prod=false && \
+    pnpm run build
+
 # 克隆并构建 2023 主题
 ARG FRONTEND_2023_REPO=https://git.orionc.me/orion/FileCodeBoxFronted2023.git
 ARG FRONTEND_2023_BRANCH=main
@@ -42,6 +51,7 @@ RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
 
 # 从构建阶段复制编译好的前端主题
 COPY --from=frontend-builder /build/fronted-2024/dist ./themes/2024
+COPY --from=frontend-builder /build/fronted-2026/dist ./themes/2026
 COPY --from=frontend-builder /build/fronted-2023/dist ./themes/2023
 
 # 安装 Python 依赖