Add global organization selector

[GregorShear]

Summary

• Add a sidebar organization selector backed by the existing global tenant state.
• Show the selected organization in content-header breadcrumbs.
• Remove duplicate selectors from the welcome and Settings pages.

Validation

• TypeScript typecheck
• ESLint and Prettier
• Vitest: 286 tests passed

[github-actions]

⚪ Code Health

No change to the dead-code surface.

48 Unused files

File imported nowhere — delete (or import) it.

     src/hooks/useDelay.ts
     src/hooks/useDraft.ts
     src/pages/NoGrants.tsx
     src/pages/OAuth.tsx
     src/services/encryption.ts
     src/types/global.ts
     src/types/vitest.ts
     src/components/graphs/TaskHoursByMonthGraph.tsx
     src/components/tables/Link.tsx
     src/context/LoopIndex/index.tsx
…and 38 more

64 Unused exports

Exported symbol with no references outside its own file — un-export it, or delete it if unused entirely

     src/context/Theme.tsx : logoColors
     src/context/Theme.tsx : intensifiedOutlineThick
     src/context/Theme.tsx : tableAlternateRowsSx
     src/context/Theme.tsx : draggableChipIconSx
     src/context/Theme.tsx : hiddenButAccessibleInput
     src/context/Theme.tsx : primaryColoredBackground_hovered
     src/context/Theme.tsx : detailsPanelBgColor
     src/context/Theme.tsx : menuBackgroundColor
     src/context/Theme.tsx : flexGrowToSiblingsSx
     src/context/Theme.tsx : shardTableRow
…and 54 more

26 Unused exported types

Exported type with no references outside its own file — un-export it, or delete it if unused entirely

     src/utils/billing-utils.ts : FREE_GB_BY_TIER
     src/types/index.ts : InferredSchemas
     src/types/index.ts : Shard
     src/components/shared/WizardDialog/index.ts : WizardStep
     src/api/dataPlanes.ts : AwsDnsEntry
     src/stores/ShardDetail/types.ts : TaskShardDetailsWithShard
     src/stores/ShardDetail/types.ts : ShardDetails
     src/components/tables/Logs/types.ts : RefreshLogsFunction
     src/types/schemaModels.ts : CollectionSchema
     src/components/editor/Bindings/types.ts : SelectedCollectionChangeData
…and 16 more

14 Unused exported enum members

An enum member referenced nowhere

     src/services/supabase.ts : CONNECTOR_TAGS
     src/services/supabase.ts : DRAFTS_EXT
     src/services/supabase.ts : TASKS_BY_DAY
     src/stores/Tables/hooks.ts : accessGrants
     src/stores/Tables/hooks.ts : accessLinks
     src/stores/Tables/hooks.ts : billing
     src/stores/Tables/hooks.ts : connectors
     src/stores/Tables/hooks.ts : entitySelector
     src/stores/Tables/hooks.ts : prefixes
     src/stores/Tables/hooks.ts : prefixAlerts
…and 4 more

5 Unused dependencies

In package.json but never imported

     package.json : @mui/lab
     package.json : @testing-library/jest-dom
     package.json : @urql/exchange-retry
     package.json : logrocket-react
     package.json : stripe

3 Unused devDependencies

In package.json devDependencies but never used

     package.json : @types/logrocket-react
     package.json : @types/react-inspector
     package.json : sharp