feat(landing,docs): SEO fixes and query-matched tool pages (#383)

Landing:
- Preload the Bricolage display font (LCP heading) to cut first paint
- Cap tool-page meta descriptions at ~160 chars via whole-sentence
  truncation, so SERP snippets no longer overflow or cut mid-phrase
- Drop dead HowTo + FAQPage JSON-LD from tool pages (Google removed
  HowTo rich results in 2023 and FAQ rich results in 2026); the visible
  content stays. Breadcrumb + WebApplication schema retained
- Shorten 22 tool titles that exceeded the ~60-char SERP limit
- Add an optional h1 override to tool SEO data
- Rewrite adjust-colors, smart-crop, and ringtone-maker to match real
  Search Console query intent (saturation; object-aware cropping;
  convert audio to ringtone), with query-matched H1s and FAQs

Docs:
- Add meta descriptions to 20 pages missing frontmatter

Repo:
- Ignore local credential JSON files (.secrets/, *client_secret*, *service_account*)

apps/docs/tools/image/restore-photo.md

@@ -1,3 +1,7 @@
+---
+description: Repair scratches, tears, and damage on old photos with an AI pipeline for restoration, face enhancement, and color.
+---
+
 # Photo Restoration
 
 Fix scratches, tears, and damage on old photos using a multi-step AI pipeline. Combines scratch repair, face enhancement, denoising, and optional colorization.