[codex] Add gsync reports and plan-driven goals

[nwang783]

Summary

• add a team-scoped gsync product feedback flow with report bug, report feature, and report list
• add a dashboard reports page backed by Firestore plus a team ID header to make local reseed mismatches visible
• switch goal-setting to plan-driven metadata and update the skill/docs to reflect the new workflow

Why

• gsync needs an internal feedback queue for early product bugs and feature requests without creating a second GitHub issue tracker
• the local dev workflow was confusing when the dashboard stayed on an older seeded team, so the dashboard now exposes the active team ID for debugging
• the goal flow changes in this worktree are bundled into the same feature publish as requested

Validation

• node --test test/join-flow-api.test.cjs test/activity-summary.test.js test/context-memory.test.js test/firestore-status.test.js test/memory-merge.test.js test/plan-file.test.js test/config.test.js test/mark-merged-plans-from-pr.test.js test/join-codes.test.cjs
• npm --prefix dashboard test -- --run src/pages/ReportsPage.test.jsx src/components/UpdateFeed.test.jsx src/components/MemoryPanel.test.jsx src/components/JoinCodePanel.test.jsx src/components/PlanDetail.test.jsx src/components/TeamColumns.test.jsx src/components/GoalBar.test.jsx src/pages/LoginPage.test.jsx
• npm run dev:cli -- report bug --title "Dashboard report visibility check" --body "Fresh local sandbox report to verify whether the reports tab is reading the Firestore collection correctly." --severity medium
• npm run dev:cli -- report list --last 5