fix: restore KaTeX assets and deployment checks

backend/common/test_frontend_assets.py

@@ -1,6 +1,9 @@
+import re
 from pathlib import Path
 
 from django.conf import settings
+from django.core.management import call_command
+from django.test import override_settings
 
 STATIC_ROOT = Path(settings.BASE_DIR) / "static"
 
@@ -71,6 +74,41 @@ def test_toolbox_and_games_资源入口与移动端触控样式存在():
     assert "@media (max-width: 700px)" in styles
 
 
+def test_latex_默认源码可渲染且_katex_静态资源完整():
+    template = (settings.BASE_DIR / "templates" / "index.html").read_text(encoding="utf-8")
+    app = (STATIC_ROOT / "js" / "app.js").read_text(encoding="utf-8")
+    katex_root = STATIC_ROOT / "vendor" / "katex"
+    katex_css = (katex_root / "katex.min.css").read_text(encoding="utf-8")
+    font_paths = set(re.findall(r"url\(fonts/([^)]+)\)", katex_css))
+
+    assert (
+        '<textarea id="latex-source" spellcheck="false">'
+        r"\int_{0}^{1} x^2\,dx = \frac{1}{3}</textarea>"
+    ) in template
+    assert r"\\int_{0}^{1}" not in template
+    assert "function normalizeLatexSource(source)" in app
+    assert "globalThis.katex.render(normalized, target" in app
+    assert "throwOnError: true" in app
+    assert len(font_paths) == 60
+    assert all((katex_root / "fonts" / path).is_file() for path in font_paths)
+    assert (katex_root / "LICENSE.txt").is_file()
+
+
+def test_production_manifest_可处理全部静态资源(tmp_path):
+    storage = "whitenoise.storage.CompressedManifestStaticFilesStorage"
+    with override_settings(
+        STATIC_ROOT=tmp_path,
+        STORAGES={
+            "default": {"BACKEND": "django.core.files.storage.FileSystemStorage"},
+            "staticfiles": {"BACKEND": storage},
+        },
+    ):
+        call_command("collectstatic", interactive=False, clear=True, verbosity=0)
+
+    assert (tmp_path / "staticfiles.json").is_file()
+    assert (tmp_path / "vendor" / "katex" / "katex.min.css").is_file()
+
+
 def test_realtime_match_联机码与_websocket_前端资源存在():
     template = (settings.BASE_DIR / "templates" / "index.html").read_text(encoding="utf-8")
     realtime = (STATIC_ROOT / "js" / "realtime.js").read_text(encoding="utf-8")