chore: bump version to v2026.4.315 and fix dropdown scroll}
- Bump version from v2026.4.314 to v2026.4.315 across all docs and package.json - Update CSS cache-busting hash in package.json and themes.js - Replace generic .p3x-gitlist-dropdown-scroll class with targeted #theme-list and #p3x-gitlist-language-list selectors for dropdown scroll - Remove color-scheme dark/light overrides from dropdown scroll styles - Add id="p3x-gitlist-language-list" to language dropdown in navigation template - Clean up changelog by removing entries for v2026.4.310 through v2026.4.314