fix: Remove template parameter from bug report URL to enable field pre-filling

GitHub's issue creation URL does not support the 'template' parameter for
pre-filling fields. When a template is specified, GitHub ignores other URL
parameters like title and body, preventing user-submitted data from being
pre-filled in the issue form.

Changes:
- Remove 'template=bug_report.yml' parameter (non-existent template)
- Remove 'labels' parameter (not supported via URL)
- Keep only 'title' and 'body' parameters for proper pre-filling
- Add explanatory comment about GitHub's URL parameter limitations
- Update tests to verify URL structure (no template parameter)

Now when users click "Report Bug", the GitHub issue form will be properly
pre-filled with their title and detailed bug report information.

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

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

python/tests/server/api_routes/test_bug_report_api.py

@@ -119,6 +119,10 @@ def test_manual_submission_url_uses_correct_repo(client, mock_bug_report):
         # Ensure old repository is NOT in URL
         assert "dynamous-community" not in data["issue_url"]
         assert "Archon-V2-Alpha" not in data["issue_url"]
+        # Verify URL contains title and body parameters (not template)
+        assert "title=" in data["issue_url"]
+        assert "body=" in data["issue_url"]
+        assert "template=" not in data["issue_url"]
 
 
 def test_api_submission_with_token(client, mock_bug_report):