Refactor foundation: decompose monolith pages and extract shared utilities/hooks/components

[evanqua]

Summary

This issue tracks the completed foundation refactor currently on branch chore/reorg-foundation and represented by the last 8 commits.

Scope covered

• Core utility extraction for schedule, analytics, marker, and zoom logic.
• Reusable hook extraction for schedule generation, team form state, and zoom/pan behavior.
• Dispatch decomposition by extracting lite adapters, team widget, portal dropdown, call-tracking state hook, and call detail row component.
• Event create and venue management decomposition into focused section components.
• Shared map interaction controls and type-safety fixes in create/venue flows.
• Documentation updates reflecting the new structure and conventions.

Commits included

• 199a347 refactor(core): extract pure schedule, analytics, marker, and zoom utilities
• 784d133 refactor(hooks): extract reusable schedule, team-form, and zoom-pan hooks
• c1146a0 refactor(dispatch): extract lite adapters, team widget, and portal dropdown
• a31ae70 refactor(dispatch): extract call tracking state hook
• c0bab8c refactor(dispatch): extract call tracking detail row
• 2bfcfbd refactor: decompose event create and venue management into focused sections
• db8e189 refactor: fix create venue typing and share map controls
• 7f233de docs: reflect decomposed event and venue sections

Acceptance criteria

• Behavior remains unchanged from user perspective.
• Refactor compiles/lints in CI environment.
• Documentation reflects the reorganized structure.
• Branch is merged and closed.