v0.5.7 — App Router SC/CC split on 3 pages

Performance

• App Router SC/CC split on 3 major pages. [owner]/[repo], /explore, and /profile/[login] were monolithic "use client" pages with no server-side rendering. Each now has a Server Component wrapper that pre-fetches the critical-path data (repo info, explore summary, profile) and passes it as initialData to the client component. The client-side fetch becomes a fallback (private repo, 404, network error) instead of the default path. LCP improves for all three routes; crawlers and social preview bots see real HTML content on first byte.
• map-style-urls.ts extracted from theme.ts. MAP_STYLE_DARK, MAP_STYLE_LIGHT, Theme, and MapProjection moved to a server-safe module with no "use client" marker. theme.ts re-exports them for backward compatibility. Prevents accidental bundle pollution if a server component ever imports map URL builders.

Bug Fixes

• sanitizeError missing from refresh-grid-mv test mock. The route imported sanitizeError from @/lib/api-helpers but the Vitest mock factory did not expose it. The function was added to the mock; the 1 failing test now passes (895/895).

Internal

• JawgBadge component made server-safe. "use client" removed from src/components/map/jawg-badge.tsx. The component is a static <a> tag with no hooks or browser APIs.