Stop Smart Search recommending the wrong movie / CAMs

TPB search is fuzzy: querying "Toy Story 5" returns Toy Story 4/3/… plus the
only real 2026 copies, which are CAM/Telesync. The LLM rejected them all, then
fallbackReleases picked the most-seeded (Toy Story 4), ignoring title/year.

Two deterministic guards:
- prefilter now drops low-quality source tags (CAM/TS/TELESYNC/SCR/…) via a
  token match, so neither the LLM nor the fallback can surface them.
- findReleases requires the confirmed TMDB year in a movie's release name, so a
  fuzzy match can't cross to a different film. If nothing survives, return no
  options and tell the user it may be unreleased / only CAMs exist.

Verified: "Toy Story 5" now returns 0 options (was Toy Story 4); Night of the
Living Dead (1990) still recommends its 1080p x265 pack.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/partial/header.html

@@ -396,7 +396,7 @@
 
 		// Step 3: render the release cards; a tap feeds the existing add dialog.
 		function tbpRenderReleases(data){
-			if(!data.options.length){ tbpSearchBody('<p>No good torrents found for '+ tbpEsc(data.title) +'.</p>'); return; }
+			if(!data.options.length){ tbpSearchBody('<p>No good-quality copy of <b>'+ tbpEsc(data.title) +'</b> found — it may not be released yet, or only low-quality (CAM) copies exist.</p>'); return; }
 			var header = '<h3>'+ tbpEsc(data.title +' ('+ (data.year || '?') +')') +'</h3>';
 			if(data.library && data.library.owned) header += '<p style="color:#2a2">✓ Already in your library ('+ tbpEsc(data.library.quality) +') — only upgrades are offered.</p>';
 			tbpSearchBody(header);