Add chat history sidebar with restore across reloads

Chat messages previously lived only in React state and vanished on
navigation or refresh. Persist each conversation as a session in
localStorage and add a sidebar to switch between, restore, or delete
past chats, matching the pattern of the account page's client-side
persistence.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012RrMZ8Y9BhuMkKNcw2bakZ

.gitea/workflows/docker.yml

@@ -1,59 +0,0 @@
-name: Docker
-# Builds the frontend for the HOMELAB instance and pushes it to this Gitea's
-# registry.
-#
-# Read the build args before changing anything: Vite inlines import.meta.env at
-# BUILD time, so VITE_API_URL is baked into the bundle and an image is tied to
-# one API. The GitHub build bakes https://api.t4t-gateway.com -- running that
-# image here would serve a UI at t4tgw.ffaerber.duckdns.org that talks to the
-# VPS, so a test signup would create a real account on production. This build
-# bakes the homelab API instead, which is the whole reason the two instances can
-# run side by side and mean anything.
-#
-# VITE_GOOGLE_CLIENT_ID comes from a repo secret; unset, Google sign-in is the
-# only thing that breaks, and the rest of the instance still exercises.
-on:
-  push:
-    branches: [main]
-  pull_request:
-  workflow_dispatch:
-
-env:
-  HOMELAB_API_URL: https://t4tgw-api.ffaerber.duckdns.org
-
-jobs:
-  build:
-    runs-on: ci-runner
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Build
-        run: |
-          set -eu
-          SHA=$(echo "${{ github.sha }}" | cut -c1-7)
-          echo "IMAGE=git.ffaerber.duckdns.org/token-for-token/hosted-gateway-frontend" >> "$GITHUB_ENV"
-          echo "SHA=$SHA" >> "$GITHUB_ENV"
-          docker build \
-            --build-arg VITE_API_URL="$HOMELAB_API_URL" \
-            --build-arg VITE_GOOGLE_CLIENT_ID="${{ secrets.VITE_GOOGLE_CLIENT_ID }}" \
-            --build-arg VITE_COMMIT_SHA=${{ github.sha }} \
-            -t "git.ffaerber.duckdns.org/token-for-token/hosted-gateway-frontend:$SHA" .
-
-      - name: Push
-        if: github.event_name != 'pull_request'
-        run: |
-          set -eu
-          echo "${{ secrets.GITEA_TOKEN }}" | docker login git.ffaerber.duckdns.org -u "${{ github.actor }}" --password-stdin
-          docker tag "$IMAGE:$SHA" "$IMAGE:latest"
-          docker push "$IMAGE:$SHA"
-          docker push "$IMAGE:latest"
-          docker logout git.ffaerber.duckdns.org
-          {
-            echo "### Pushed"
-            echo
-            echo '```'
-            echo "$IMAGE:$SHA"
-            echo '```'
-            echo
-            echo "API baked in: $HOMELAB_API_URL"
-          } >> "$GITHUB_STEP_SUMMARY"

.github/workflows/docker-image.yml

@@ -0,0 +1,54 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: ['main', 'develop']
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: |
+            ghcr.io/${{ github.repository_owner }}/hosted-gateway-frontend:${{ github.ref_name }}
+            ghcr.io/${{ github.repository_owner }}/hosted-gateway-frontend:${{ github.sha }}
+          build-args: |
+            VITE_API_URL=https://api.t4t-gateway.com
+            VITE_GOOGLE_CLIENT_ID=${{ secrets.VITE_GOOGLE_CLIENT_ID }}
+            VITE_COMMIT_SHA=${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: docker stack deploy
+        uses: appleboy/ssh-action@v1.0.3
+        with:
+          username: root
+          host: ${{ secrets.SSH_KNOWN_HOSTS }}
+          key: ${{ secrets.SSH_PRIV_KEY }}
+          script: |
+            echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+            docker pull ghcr.io/token-for-token/hosted-gateway-frontend:main
+            docker stack deploy -c ~/devops/hostinger/prod-stack.yaml prod --with-registry-auth --resolve-image always
+            docker image prune -f --filter "until=24h"