fix: angle brackets

[normenmueller]

fix/angle-brackets

Link Resolution Follow‑ups

Tightens link parsing and display resolution after the initial angle‑bracket support. Anchors are stripped for file resolution while still preserved for navigation, and relative project links resolve against the source file where possible.

Examples (illustrative):

• [My Note](Folder/My Note.md#Section) resolves to Folder/My Note.md for lookup, but still opens #Section.
• [[Folder/My Note#Section]] displays as My Note while keeping the fragment for navigation.
• Relative project links display the correct title when resolved from the task's path.

Changelog

• Strip #heading / ^block fragments when resolving link paths.
• Preserve fragments for navigation and hover in linkRenderer.
• Resolve project display names using sourcePath where available.
• Pass sourcePath through stats/filter helpers for consistent relative link handling.

Tests

• ./node_modules/.bin/jest tests/unit/utils/linkUtils.test.ts --runInBand
• ./node_modules/.bin/jest tests/unit/ui/linkRenderer.test.ts --runInBand

cf. PR.md