Revert "fix vite web build to work with subpath"

This reverts commit 1a9f36ce9e.

Dockerfile

@@ -2,11 +2,6 @@
 FROM node:23-alpine as builder
 WORKDIR /app
 
-# PUBLIC_PATH at build time: passed as VITE_BASE_PATH so assets are built for that subpath.
-# Use "/" for root or "/feishin/" for a subpath (trailing slash required for subpaths).
-ARG PUBLIC_PATH=/
-ENV PUBLIC_PATH=${PUBLIC_PATH}
-
 # Copy package.json first to cache node_modules
 COPY package.json pnpm-lock.yaml .
 
@@ -15,24 +10,18 @@ RUN npm install -g pnpm
 RUN pnpm install
 
 # Copy code and build with cached modules
-# Normalize PUBLIC_PATH to trailing slash for subpaths (Vite base expects "/" or "/foo/")
 COPY . .
-RUN VITE_BASE_PATH=$(echo "$PUBLIC_PATH" | sed 's|/*$|/|') && \
-    export VITE_BASE_PATH && \
-    pnpm run build:web
+RUN pnpm run build:web
 
 # --- Production stage
 FROM nginx:alpine-slim
 
-ARG PUBLIC_PATH=/
-ENV PUBLIC_PATH=${PUBLIC_PATH}
-
 COPY --chown=nginx:nginx --from=builder /app/out/web /usr/share/nginx/html
 COPY ./settings.js.template /etc/nginx/templates/settings.js.template
 COPY ng.conf.template /etc/nginx/templates/default.conf.template
 
 ENV SERVER_LOCK=false SERVER_NAME="" SERVER_TYPE="" SERVER_URL=""
-ENV LEGACY_AUTHENTICATION="" ANALYTICS_DISABLED=""
+ENV LEGACY_AUTHENTICATION="" ANALYTICS_DISABLED="" PUBLIC_PATH="/"
 
 EXPOSE 9180
 CMD ["nginx", "-g", "daemon off;"]