Workflow: dedupe platforms in release notes generation and use script-generated RELEASE_NOTES.md when present

Author: accesstechnology-mike

.github/workflows/update.yml

@@ -69,6 +69,13 @@ jobs:
         if: steps.git-check.outputs.changes == 'true'
         run: |
           echo "Generating release notes for v${{ steps.latest.outputs.version }}"
+          if [ -f RELEASE_NOTES.md ]; then
+            echo "Using RELEASE_NOTES.md generated by update script"
+            echo "path=RELEASE_NOTES.md" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Fallback: generate notes here with Python and canonicalize platform keys to avoid duplicates
           cat > generate_notes.py << 'EOF'
           import json
           import sys
@@ -87,9 +94,29 @@ jobs:
           print()
           print("| Platform | Link | Size | SHA256 |")
           print("| --- | --- | --- | --- |")
-          
-          platforms = latest.get('platforms', {})
-          details = latest.get('platformDetails', {})
+
+          # Canonicalize and dedupe platform keys (collapse aliases)
+          alias_map = {
+              'win32-x64': 'win32-x64-system',
+              'win32-arm64': 'win32-arm64-system',
+          }
+
+          def canon(key: str) -> str:
+              return alias_map.get(key, key)
+
+          raw_platforms = latest.get('platforms', {})
+          platforms = {}
+          for k, v in raw_platforms.items():
+              ck = canon(k)
+              if ck not in platforms or k == ck:
+                  platforms[ck] = v
+
+          raw_details = latest.get('platformDetails', {})
+          details = {}
+          for k, v in raw_details.items():
+              ck = canon(k)
+              if ck not in details or k == ck:
+                  details[ck] = v
           
           # Define display names
           display_names = {