fix(path): resolve short wikilinks to folder notes

[alastairsounds]

slugifyFilePath rewrites Foo/Foo.md to the slug Foo/index. The last path segment is then index, so the shortest strategy in transformLink never matches a short [[Foo]] link. The link resolves to a root-relative path that does not exist. No error occurs.

transformLink now retries against the folder name. The retry runs only under two conditions:

• The first pass finds no match.
• The link has one segment.

If a real file has that name then the first pass matches it and the retry does not run.

These conditions are necessary. A version without them changed links that already resolved. If a vault holds both Archive/Note.md and Folder/Note/Note.md, a short [[Note]] link keeps Archive/Note as its target.

Tests

Two cases in test/path.test.ts:

• resolves a folder note by its folder name fails without the change.
• prefers a real file over a folder note of the same name passes with the change and without it. This case makes sure that a real file keeps priority.

All 107 tests pass. The typecheck, eslint, prettier, and vitest gates in npm run check give no error.

---

Resolves #4