the-hang-man: tracks with an apostrophe (e.g. "I'm Upset") deleted the DB row
but left the file. The library DB stored the title with U+2019 (the curly form
Spotify/Apple metadata uses) while the file was written to disk with U+0027
(ASCII). _resolve_library_file_path compared the curly path byte-for-byte via
os.path.exists, missed every time, and reported "could not be deleted".
Fix: resolve confusable-tolerantly. New core/library/path_resolve.find_on_disk
descends the path component by component, taking an exact match when present and
otherwise folding a small set of typographic look-alikes (curly vs straight
quotes, en/em dash, ellipsis, nbsp) for the comparison ONLY — it never renames,
just finds the file that's actually there. Exact matches always win per
component, so paths that already resolved are byte-for-byte unaffected. This
also fixes existing mismatched files (no re-import) and every caller of
_resolve_library_file_path (sidecar cleanup, dead-file checks, streaming), not
just delete.
Case is deliberately NOT folded: a case-sensitive dataset (ext4/ZFS) can hold
names differing only by case, and folding could resolve the wrong file. The
reported failure is purely typographic.
Tests: real temp-file fixtures exercising the actual byte mismatch — curly-DB →
ascii-disk resolves, exact still works, confusable in a folder component, exact
wins when both encodings present, genuinely-different name does NOT collide,
missing file → None. 10 new tests; 949 resolver-adjacent tests pass.
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