Operator-reported: the model-picker and conversation-menu overlays are hard to
read over busy chat content at path-glass-card's shared rgba(0,0,0,0.65).
Scoped .header-overlay-panel (0.88) in ChatHeader.vue only — path-glass-card
itself is untouched, so BookDetail/ArticleDetail/TVSeriesDetail/WebsiteDetail/
ContentPanel/ChatWindow keep their existing glass. Unlayered scoped rule beats
the @layer components class without !important, and reaches the panels through
their Teleport to body.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
