[Copilot]

Summary

• Escape task names and filter values before rendering frontend HTML.
• Honor runtime Due Soon overrides for fixed-schedule completion and clamp negative thresholds.
• Correct Lovelace resource version parsing and update README/service documentation.
• Add regression coverage for the fixes.

Validation

• 311 unit tests passed.
• JavaScript syntax, Python compilation, and git diff --check passed.
• Playwright regression test added but not run; it requires a live Home Assistant instance.