chore(web): cleanup stale code

[tyler-dane]

Summary

Simplicity

Automated validation

Independent review

Test plan

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Note

Medium Risk
Broad deletions touch provider wiring and shared types; risk is mainly if any removed module was still referenced outside the diff, though greps suggest dead code. No auth or payment logic changes beyond a toast string.

Overview
Removes a large slice of unused web code—legacy grid overlap layout, EventInViewParser / view-parser tests, grid event validator, Dexie handleDatabaseError plumbing, shared api.types pagination helpers, and several UI pieces (custom Phosphor icon wrappers, DropZone, ShortcutTip, LoginAbsoluteOverflowLoader, CompassRefsProvider / useCompassRefs).

Test harness is slimmed: renderHookWithStore is dropped (docs now point at mock.render.tsx for renderHook), plus deleted setTestWindowUrl and duplicate mockNavigatorPlatform (platform mocking stays in mock.setup.ts). Related unit tests for removed modules are deleted with the code.

Types and exports are tightened—Option_Time → TimeOption, date helpers colocate SelectedDates / time-change params, Divider and Textarea inline their props, and several ports/types stop being exported. user-metadata.store drops unused selectUserMetadata / selectGoogleMetadata. Session exposes listeners as a public field instead of a private #listeners set.

Provider tree no longer wraps the app in CompassRefsProvider. Minor copy tweak on the sign-out error toast (emoji removed).

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