Refactor and harden graph browser assets

tools/check_web_assets.py

@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-import ast
 import os
 import shutil
 import subprocess
@@ -16,30 +15,11 @@ from docforge.project import Project
 from docforge.rendering import RenderService
 
 ROOT = Path(__file__).resolve().parents[1]
-SOURCE = ROOT / "src" / "docforge" / "visualization.py"
+ASSET_ROOT = ROOT / "src" / "docforge" / "assets"
 
 
 def _graph_browser_html() -> str:
-    tree = ast.parse(SOURCE.read_text(encoding="utf-8"), filename=str(SOURCE))
-    for statement in tree.body:
-        if not isinstance(statement, ast.Assign):
-            continue
-        if any(
-            isinstance(target, ast.Name) and target.id == "_GRAPH_BROWSER_HTML"
-            for target in statement.targets
-        ):
-            value = ast.literal_eval(statement.value)
-            if isinstance(value, str):
-                return value
-    raise RuntimeError("Could not find the literal graph-browser HTML asset")
-
-
-def _embedded(html: str, tag: str) -> str:
-    opening = f"<{tag}>"
-    closing = f"</{tag}>"
-    if html.count(opening) != 1 or html.count(closing) != 1:
-        raise RuntimeError(f"Expected exactly one embedded {tag} asset")
-    return html.split(opening, 1)[1].split(closing, 1)[0]
+    return (ASSET_ROOT / "graph.html").read_text(encoding="utf-8")
 
 
 def _rendered_manual_html() -> str:
@@ -110,7 +90,7 @@ def main() -> int:
                 "--stdin-filename=graph-browser.css",
                 "--max-warnings=0",
             ],
-            _embedded(html, "style"),
+            (ASSET_ROOT / "graph.css").read_text(encoding="utf-8"),
         ),
         (
             "JavaScript",
@@ -120,7 +100,7 @@ def main() -> int:
                 "--stdin-filename=graph-browser.js",
                 "--max-warnings=0",
             ],
-            _embedded(html, "script"),
+            (ASSET_ROOT / "graph.js").read_text(encoding="utf-8"),
         ),
     )
     results = [_run(label, command, content) for label, command, content in checks]