Extract title tags & per-row chevron expand

Add parsing and UX for bracketed title metadata and per-row title expansion. Introduces extractTitleTags (src/lib/utils/title-tags.ts) to pull bracketed tags from result titles (de-duplicated, slash-split) and useIsTruncated (src/lib/hooks/useIsTruncated.ts) to detect horizontal overflow. Refactors InteractiveTorrentSearchModal to a ResultRow component that renders title chips (slate chips) for parsed tags (filtered vs displayFormat), shows a chevron disclosure only when the title is truncated (or while expanded), toggles expansion per GUID, and resets expansion state when the modal closes. Tests added/updated for the component, hook, and parser; documentation updated to reflect behavior.

tests/lib/hooks/useIsTruncated.test.tsx

@@ -0,0 +1,45 @@
+/**
+ * Component: useIsTruncated Hook Tests
+ * Documentation: documentation/frontend/components.md
+ */
+
+// @vitest-environment jsdom
+
+import React, { useRef } from 'react';
+import { render } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import { useIsTruncated } from '@/lib/hooks/useIsTruncated';
+
+function Probe({ scrollWidth, clientWidth }: { scrollWidth: number; clientWidth: number }) {
+  const ref = useRef<HTMLSpanElement | null>(null);
+  const attach = (el: HTMLSpanElement | null) => {
+    ref.current = el;
+    if (el) {
+      Object.defineProperty(el, 'scrollWidth', { configurable: true, value: scrollWidth });
+      Object.defineProperty(el, 'clientWidth', { configurable: true, value: clientWidth });
+    }
+  };
+  const truncated = useIsTruncated(ref);
+  return (
+    <span ref={attach} data-testid="probe" data-truncated={truncated ? 'yes' : 'no'}>
+      probe
+    </span>
+  );
+}
+
+describe('useIsTruncated', () => {
+  it('returns false when scrollWidth fits inside clientWidth', () => {
+    const { getByTestId } = render(<Probe scrollWidth={80} clientWidth={120} />);
+    expect(getByTestId('probe').getAttribute('data-truncated')).toBe('no');
+  });
+
+  it('returns false when scrollWidth equals clientWidth', () => {
+    const { getByTestId } = render(<Probe scrollWidth={100} clientWidth={100} />);
+    expect(getByTestId('probe').getAttribute('data-truncated')).toBe('no');
+  });
+
+  it('returns true when scrollWidth exceeds clientWidth', () => {
+    const { getByTestId } = render(<Probe scrollWidth={400} clientWidth={120} />);
+    expect(getByTestId('probe').getAttribute('data-truncated')).toBe('yes');
+  });
+});