Fix overlapping Google Calendar event lanes

[michaelzick]

Summary

Fixes Google Calendar blockers on the planner timeline when multiple synced events share the same time range, and tightens the hide/sync behavior around those blockers.

• Equal-width overlapping event lanes: synced Google events that occur at the same time now split horizontally across the timeline row instead of rendering on top of each other.
• Shared-lane Hide controls: overlapping event cards keep the X Hide control pinned to the top-right corner, matching the full-width card layout while reserving space so title/time text truncates cleanly.
• Stable hide behavior: hiding a Google blocker removes it immediately and keeps it hidden through normal refetch/background sync.
• Explicit sync restore behavior: clicking Sync calendar restores hidden Google blockers from the fresh sync, while automatic syncs continue respecting local hides.
• Typed sync query option: the calendar sync route now accepts a typed restoreHidden query flag so manual and background syncs can intentionally differ.

Changes

• timeline-board.tsx - computes visible calendar-event overlap lanes and passes lane placement into each event card.
• timeline-board-calendar-event.tsx - applies lane-based left/width styles and pins shared-lane Hide controls to the top-right.
• timeline-board.test.tsx - adds regression coverage for three simultaneous synced events and top-right Hide controls.
• planner-service-calendar.ts / planner route/service/client wiring - preserves dismissal markers for background sync and clears them only for explicit restore syncs.
• day-plan.ts - adds the shared calendarSyncQuerySchema for the new sync option.
• Hook/server/shared tests updated for hide persistence and manual restore behavior.

Test plan

• corepack pnpm --filter @timefraim/web test -- src/components/timeline-board.test.tsx
• corepack pnpm --filter @timefraim/server test -- src/services/planner-service.test.ts
• corepack pnpm --filter @timefraim/web test -- src/hooks/use-planner-mutations.test.tsx src/hooks/use-auto-google-task-sync.test.tsx
• corepack pnpm --filter @timefraim/shared test -- src/index.test.ts
• corepack pnpm lint
• corepack pnpm typecheck
• git diff --check

Created by Codex