fix: asset URLs carry a content-based build id so edited scripts are never served stale

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -50,6 +50,7 @@ Follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) · versioned wi
 - **The page thumbnail is the Review button.** In the thumbnail grid, clicking the (big) page image opens the page in review; the separate *Review* / *Review this page* buttons are gone. A page shared by two or more articles keeps one labelled *Review* button per article, so it stays clear which is meant.
 
 ### Fixed
+- **Changed scripts and stylesheets now reach the browser immediately.** They were requested under a version that only moved at release time (`…js?v=1.53.4`) and cached as immutable for a year, so a browser or proxy could keep running old code after an update (a button added to a script simply did not appear). The app shell now requests every asset under `<version>-<build id>`, where the build id follows the newest script/stylesheet/manifest change.
 - **An approved page is no longer purple.** A page the quality check flagged stayed purple even after you approved its article; now your approval wins and the page shows its review colour (the warning badge on the card still lists what the check found). Purple means flagged *and* nobody has approved anything on the page. An old MP3 on an article nobody approved (left over from before pages were linked) no longer turns a page green either: audio only counts for approved articles.
 - **Reading order is now applied automatically after import, *OCR again* and every per-page fix**, not only by the manual *Fix reading order* button. Until now the order after import was whatever the vision/LLM step returned, so a column's short last box could be read after the whole other column; on the measured issue 101 of 204 pages had a saved order that differs from the column-aware order. Pages whose order you fixed by hand stay untouched, except after *OCR again*, when every region is new and a hand order can no longer apply.
 - **The review list shows each region's whole text**, not the first 220 characters, so every misspelling gets its red wavy underline (like a word processor). The engine's `[Non-Text]` marker and hairline boxes (under 3 pt tall) are now treated as OCR noise by *Clean up boxes* and after a page re-OCR, so they no longer show up as near-invisible regions. Fitted boxes keep a little air on grown sides.

routes/admin.py

@@ -7,7 +7,7 @@ import re
 from pathlib import Path
 
 from fastapi import APIRouter, Body, HTTPException
-from fastapi.responses import FileResponse, PlainTextResponse, Response
+from fastapi.responses import FileResponse, HTMLResponse, PlainTextResponse, Response
 
 from core.constants import STATIC_DIR, __version__
 
@@ -78,12 +78,34 @@ def _mount_relation(path_str: str, mounts: frozenset[str]) -> tuple[bool, bool]:
     return is_persisted, leads_to
 
 
+_ASSET_URL_RE = re.compile(r"(/static/[^\"'\s?]+)\?v=[^\"'\s&]+")
+
+
+def asset_build_id() -> str:
+    """A version string that changes whenever any script, stylesheet or module list changes.
+
+    Scripts and stylesheets are requested as ``file?v=<version>`` and cached for a year as
+    immutable, so a version that only moves at release time leaves a browser (or a proxy in front
+    of it) running old code after an edit -- a button added to a script simply does not appear.
+    The newest modification time under static/ js, css and the manifest is folded into the version.
+    """
+    newest = 0
+    for pattern in ("js/*.js", "css/*.css", "*.css", "loader.js", "nav.js", "module-manifest.json"):
+        for path in STATIC_DIR.glob(pattern):
+            try:
+                newest = max(newest, int(path.stat().st_mtime))
+            except OSError:
+                pass
+    return f"{__version__}-{newest:x}"
+
+
 @router.get("/")
 async def index():
-    return FileResponse(
-        STATIC_DIR / "index.html",
-        headers={"Cache-Control": "no-store, max-age=0"},
-    )
+    """The app shell, with every /static asset URL carrying the current build id."""
+    html = (STATIC_DIR / "index.html").read_text("utf-8")
+    build = asset_build_id()
+    return HTMLResponse(_ASSET_URL_RE.sub(lambda m: f"{m.group(1)}?v={build}", html),
+                        headers={"Cache-Control": "no-store, max-age=0"})
 
 
 @router.get("/favicon.ico")

tests/test_asset_versions.py

@@ -0,0 +1,39 @@
+"""The app shell must request scripts and stylesheets under a version that follows their content."""
+import os
+import tempfile
+import time
+import unittest
+from pathlib import Path
+
+os.environ.setdefault("CONFIG_DIR", tempfile.mkdtemp(prefix="ttvc-assetv-"))
+
+
+class AssetBuildIdTests(unittest.TestCase):
+    def test_the_index_rewrites_every_static_asset_version(self):
+        import asyncio
+        from routes.admin import asset_build_id, index
+        response = asyncio.run(index())
+        html = response.body.decode("utf-8")
+        build = asset_build_id()
+        self.assertIn(f"/static/style.css?v={build}", html)
+        self.assertIn(f"/static/loader.js?v={build}", html)
+        self.assertNotIn("?v=1.53.4", html)
+        self.assertEqual(response.headers["cache-control"], "no-store, max-age=0")
+
+    def test_the_build_id_changes_when_a_script_changes_and_not_otherwise(self):
+        from core.constants import STATIC_DIR
+        from routes.admin import asset_build_id
+        first = asset_build_id()
+        self.assertEqual(first, asset_build_id())
+        probe = Path(STATIC_DIR) / "js" / "magazine.js"
+        original = probe.stat().st_mtime
+        try:
+            os.utime(probe, (original + 1_000_000, original + 1_000_000))
+            self.assertNotEqual(first, asset_build_id())
+        finally:
+            os.utime(probe, (original, original))
+        self.assertEqual(first, asset_build_id())
+
+
+if __name__ == "__main__":
+    unittest.main()