Rebase on main, run black formatting, add CHANGELOG entry

- Rebased on origin/main (includes new tests and changes from #1124-#1128)
- Ran `poetry run black .` for formatting (reformatted test_generate.py)
- Added Fixed entry in CHANGELOG.md under [Unreleased]

Co-authored-by: oscarlevin <6504596+oscarlevin@users.noreply.github.com>
Agent-Logs-Url: https://github.com/PreTeXtBook/pretext-cli/sessions/72d5b309-fec0-4dad-8af0-1cbe035c2679

Author: Copilot

CHANGELOG.md

@@ -9,6 +9,10 @@ Instructions: Add a subsection under `[Unreleased]` for additions, fixes, change
 
 ## [Unreleased]
 
+### Fixed
+
+- Failed individual asset generation (when core does not produce the expected output file) now raises an error and is no longer silently treated as a success. This prevents incorrectly caching incomplete asset generation results.
+
 ### Changed
 
 - The default Asymptote generation method is now `local` (using the local `asy` binary) instead of `server`. This improves reliability since the server method has been subject to breakage whenever the Asymptote web interface is updated. Users who need the server method can still opt in via `asy-method="server"` in `project.ptx`.

tests/test_generate.py

@@ -5,6 +5,7 @@
 individual_* functions in pretext/project/generate.py should raise an
 exception so that the asset type is not added to the generated asset cache.
 """
+
 from pathlib import Path
 from unittest.mock import patch
 
@@ -49,7 +50,9 @@ def test_individual_latex_image_succeeds_when_output_exists(tmp_path: Path) -> N
     dest_dir = tmp_path / "dest"
     dest_dir.mkdir()
 
-    def fake_conversion(latex_image: str, outformat: str, dest_dir: Path, method: str) -> None:
+    def fake_conversion(
+        latex_image: str, outformat: str, dest_dir: Path, method: str
+    ) -> None:
         # Simulate a successful conversion by creating the expected output file.
         (dest_dir / Path(latex_image).with_suffix(".svg").name).touch()