Fix emoji font embedding in PDF generation (#10678)

* Initial plan for issue

* Add plan for fixing emoji font embedding in PDF

Co-authored-by: yufeih <[email protected]>

* Add support for emoji fonts in PDF generation

Co-authored-by: yufeih <[email protected]>

* Fix PDF document generation to properly support emoji fonts

Co-authored-by: yufeih <[email protected]>

* Add cross-platform emoji font paths and improve documentation

Co-authored-by: yufeih <[email protected]>

* Revert code changes and install fonts-noto-color-emoji in CI

Co-authored-by: yufeih <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: yufeih <[email protected]>

Author: Copilot

.github/actions/build/action.yml

@@ -13,6 +13,13 @@ runs:
         9.x
         8.x
 
+  - name: Install fonts-noto-color-emoji package (Linux only)
+    if: runner.os == 'Linux'
+    shell: bash
+    run: |
+      sudo apt-get update
+      sudo apt-get install -y fonts-noto-color-emoji
+
   - run: npm ci
     shell: bash
     working-directory: templates

.github/workflows/snapshot.yml

@@ -24,6 +24,12 @@ jobs:
         ref: ${{ github.ref_name }}
         lfs: true
 
+    # Install fonts-noto-color-emoji for emoji support in PDF generation
+    - name: Install fonts-noto-color-emoji
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y fonts-noto-color-emoji
+
     # Build projects
     - uses: ./.github/actions/build