feat(dashboard): add project results sync UX

[christso]

Summary

• Adds project-level results sync status/action UI for configured Dashboard projects.
• Surfaces clean/unavailable/behind/ahead/dirty/conflicted/syncing states with repo, remote run count, last synced, dirty/conflict path counts, diff summary, and safe next actions.
• Shows pending metadata badges for dirty remote run tags and enables remote tag edits through the existing tag mutation API.
• Uses project display names in project-scoped Dashboard chrome.

Verification

• bun test apps/dashboard/src/lib/project-sync-status.test.ts
• bunx biome check apps/dashboard/src/lib/types.ts apps/dashboard/src/lib/project-sync-status.ts apps/dashboard/src/lib/project-sync-status.test.ts apps/dashboard/src/components/RunSourceToolbar.tsx apps/dashboard/src/components/RunList.tsx apps/dashboard/src/components/AnalyticsTab.tsx apps/dashboard/src/components/Breadcrumbs.tsx apps/dashboard/src/components/Sidebar.tsx apps/dashboard/src/routes/index.tsx apps/dashboard/src/routes/projects/$projectId.tsx apps/dashboard/src/lib/api.ts
• bun --filter @agentv/dashboard build
• bun --filter @agentv/core build (preflight for CLI source UAT)
• pre-push hook: typecheck + biome check . passed on successful push

UAT Evidence

• Live project page: /tmp/agentv-av-hbv-3/project-runs-live.png
• Mock dirty metadata state: /tmp/agentv-av-hbv-3/project-runs-dirty-mock.png
• Mock blocked sync feedback: /tmp/agentv-av-hbv-3/project-sync-blocked-feedback-mock.png