fix(catalog): treat tools as first-class listings

[jal-co]

What

• normalize schemeless tool/site URLs to HTTPS before inspect or submit
• use listing-first labels and count every listing kind in Overview/sidebar totals
• add safe image fallbacks for broken or missing tool preview images
• add back-to-listings navigation and a Component / Tool or site creation menu
• allow approved tools/sites to use the same clearly labeled paid boost as components

Why

Tools and sites are first-class Modulora listings, and future listing kinds should not require component-specific dashboard count changes. This also fixes broken legacy Open Graph previews and the confusing schemeless URL flow.

How

The Studio rollup intentionally counts all namespace records without a listingKind filter. A reusable ToolListingImage attaches image error handling after hydration and renders a domain fallback. Boost eligibility now depends on approval state rather than listing kind; public paid placement remains visibly labeled.

Testing

• pnpm --filter web typecheck
• pnpm --filter web test (79 passed, 9 integration tests skipped without credentials)
• pnpm --filter web build
• pnpm --filter web build-storybook
• git diff --check
• browser checks at 1440×900 and 390×844: fallback rendering, Add yours menu, Tool badge, back navigation, and no horizontal overflow

Screenshots

• Catalog fallback + creation menu: /tmp/catalog-tool-card-fallback.png
• Tool detail back navigation: /tmp/tool-detail-back-listings.png