feat(hover): add track details preview on hover + fix all ruff violations

Implement comprehensive track information display on hover and resolve all
code quality issues to achieve complete ruff compliance.

MAJOR FEATURES:
- Track details preview on hover with rich metadata display
- Async BPM fetching with loading indicator
- Enhanced metadata utilities with fuzzy matching
- TIDAL API extras integration

FILES MODIFIED: 15+ files (core, UI, tests, docs)

RUFF COMPLIANCE: 0 errors (89+ violations resolved)
- Fixed E999 syntax error in metadata_utils.py
- Refactored 10+ complex functions (C901)
- Updated error handling (S110, S112, SIM105)
- Modernized type hints (UP038)
- Fixed naming conflicts (A001, F811)

BUG FIXES:
- Added missing _on_update_cover() method (11 test failures)
- Fixed BPM display and async loading
- Improved thread safety

TESTING: 30 passed, 1 skipped
DOCUMENTATION: Windows PowerShell support, tox troubleshooting

.pre-commit-config.yaml

@@ -1,6 +1,3 @@
-default_language_version:
-  python: python3.12
-
 default_stages: [pre-commit, pre-push]
 
 repos:
@@ -12,6 +9,7 @@ repos:
       - id: check-toml
       - id: check-yaml
       - id: end-of-file-fixer
+        exclude: LICENSE
       - id: trailing-whitespace
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
@@ -24,13 +22,6 @@ repos:
     hooks:
       - id: prettier
 
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.5.0
-    hooks:
-      - id: check-yaml
-      - id: end-of-file-fixer
-        exclude: LICENSE
-
   - repo: local
     hooks:
       - id: pyupgrade