refine post-install and hardware GPU docs, Monitor UX and CLI styling

- rewrite the 15 post-install pages and the 3 hardware GPU pages so they reflect the current scripts (reversibility, tracked-tool counts, kernel parameters, per-tool commands, Alpine LXC propagation flow)
- migrate the legacy step-badge helper on post-install/optional and create-vm/synology to the canonical pill component, with the stepLabel key added in each locale
- fix rich-text i18n calls missing helpers across network, automated, optional, security, customization and the post-install landing pages, and escape the `<iface>` placeholder in automated so intl no longer parses it as a tag
- remove the mouse-follow blue overlay from the docs landing layout
- reposition the App-tab Edit button and stack the Search and Register controls vertically on mobile
- move the Bulk update Configure/Edit control into the section header so it behaves the same on desktop and mobile
- show a spinner during the final autoremove/autoclean pass of update-pve-safe so the cleanup step reads as active instead of silent
- restyle the shell spinner and msg_info in a distinctive purple and drop the unused msg_lang duplicate
- add a web-docs i18n build script and its CI workflow, plus tests for the pushover notification channel

.github/workflows/build-web-docs-i18n.yml

@@ -0,0 +1,119 @@
+name: Build web documentation translations
+
+on:
+  push:
+    branches: [develop]
+    paths:
+      - 'web/messages/en/*.json'
+      - 'web/messages/en/**/*.json'
+      - '.github/scripts/build_web_docs_i18n.py'
+      - '.github/scripts/build_translation_cache.py'
+      - '.github/workflows/build-web-docs-i18n.yml'
+  workflow_dispatch:
+    inputs:
+      languages:
+        description: 'Comma-separated locales'
+        default: 'es,de,fr,it,pt,sk,sv'
+      section:
+        description: 'File or directory below web/messages/en'
+        default: '.'
+      max_files:
+        description: 'Maximum pending files per locale; 0 means all'
+        default: '0'
+      refresh:
+        description: 'Overwrite existing translations in the selected scope'
+        type: boolean
+        default: false
+      dry_run:
+        description: 'Report pending coverage without writing files'
+        type: boolean
+        default: false
+
+concurrency:
+  group: build-web-docs-i18n-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  translate:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    timeout-minutes: 120
+
+    steps:
+      - name: Checkout develop
+        uses: actions/checkout@v4
+        with:
+          ref: develop
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install translation provider
+        run: |
+          python -m pip install --upgrade pip
+          pip install 'googletrans==4.0.0-rc1' 'httpx==0.13.3' 'httpcore==0.9.1' 'h11==0.9.0'
+
+      - name: Build missing translations
+        shell: bash
+        run: |
+          LANGUAGES="${{ github.event.inputs.languages }}"
+          LANGUAGES="${LANGUAGES:-es,de,fr,it,pt,sk,sv}"
+          SECTION="${{ github.event.inputs.section }}"
+          SECTION="${SECTION:-.}"
+          MAX_FILES="${{ github.event.inputs.max_files }}"
+          MAX_FILES="${MAX_FILES:-0}"
+
+          EXTRA_ARGS=()
+          if [[ "${{ github.event.inputs.refresh }}" == "true" ]]; then
+            EXTRA_ARGS+=(--refresh)
+          fi
+          if [[ "${{ github.event.inputs.dry_run }}" == "true" ]]; then
+            EXTRA_ARGS+=(--dry-run)
+          fi
+
+          python .github/scripts/build_web_docs_i18n.py \
+            --source-dir web/messages/en \
+            --messages-dir web/messages \
+            --languages "$LANGUAGES" \
+            --section "$SECTION" \
+            --max-files "$MAX_FILES" \
+            --provider googletrans \
+            --workers 4 \
+            "${EXTRA_ARGS[@]}"
+
+      - name: Validate catalogs
+        run: |
+          python .github/scripts/build_web_docs_i18n.py \
+            --source-dir web/messages/en \
+            --messages-dir web/messages \
+            --languages "${{ github.event.inputs.languages || 'es,de,fr,it,pt,sk,sv' }}" \
+            --check
+
+      - name: Commit and push changes
+        if: ${{ github.event.inputs.dry_run != 'true' }}
+        shell: bash
+        run: |
+          if git diff --quiet -- web/messages/; then
+            echo "No documentation translations changed."
+            exit 0
+          fi
+
+          git config user.name "ProxMenuxBot"
+          git config user.email "bot@proxmenux.local"
+          git add web/messages/
+          git commit -m "docs(i18n): update documentation translations"
+
+          for attempt in 1 2 3 4 5; do
+            git fetch origin develop
+            if git rebase origin/develop && git push origin develop; then
+              exit 0
+            fi
+            git rebase --abort 2>/dev/null || true
+            sleep $((attempt * 3))
+          done
+          exit 1