🔧 Fix E2E frontend Dockerfile node_modules cleanup

- Remove existing node_modules from copied source
- Add CI=true env for non-interactive pnpm install

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

features/conversation-assistant/e2e/Dockerfile.frontend

@@ -17,7 +17,11 @@ RUN echo "@lilith:registry=http://forge.nasty.sh/api/packages/lilith/npm/" > .np
 # Copy ALL source code first (before install so pnpm can resolve workspace deps)
 COPY frontend-dev/ ./
 
-# Install dependencies with rebuild for esbuild
+# Remove any existing node_modules from copied source
+RUN rm -rf node_modules
+
+# Install dependencies with rebuild for esbuild (CI=true for non-interactive mode)
+ENV CI=true
 RUN pnpm config set side-effects-cache false && \
     pnpm install --no-frozen-lockfile && \
     pnpm rebuild esbuild