[bensoncappp]

Summary

• Bug: if a Server Action request never reaches the server (e.g. offline), the call rejects instead of returning { success: false }, so Save / Remove / tag buttons stayed on "Saving…" with no message
• Added callAction() (features/destinations/callAction.ts): wraps a Server Action call and turns a rejected request into { success: false, error: 'Connection problem…' }
• Used for save and remove on Screen 1, and for tag updates and remove on Screen 2, so the user always gets a toast (1E / 2E) and the button resets (AC-10)

Type of change

• Bug fix (fix:)
• New feature (feat:)
• Refactor (refactor:)
• Documentation (docs:)
• Infrastructure / CI (chore:, build:, ci:)

Test plan

• Unit tests pass (pnpm run test): 3 new tests for callAction (31 total)
• TypeScript check passes (pnpm run typecheck)
• Lint passes (pnpm run lint)
• Manual smoke test against a dev Firebase project: DevTools → Network → Offline → Save shows "Connection problem…" toast, button returns to Save, Firestore unchanged
• No unreplaced {{placeholders}} (pnpm run validate)

Firestore changes

• No Firestore changes
• Security rules updated (firebase/firestore.rules)
• Schema documented (docs/FIRESTORE-SCHEMA.md)
• Indexes updated (firebase/firestore.indexes.json)

Environment variables

• No new env vars
• New vars added to .env.example files and docs/ENV-VARS.md

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