chore(lint): clean up 113 ESLint errors -> 0

[chriskehayias]

Summary

Resolves all ESLint errors and warnings surfaced after the dependency update bumped eslint-config-next to 16.2.6 (which introduced React Compiler-aware hooks rules and stricter no-unused-vars defaults).

Before: 113 errors, 8 warnings
After: 0 errors, 0 warnings

eslint.config.mjs changes

• Ignore coverage/** (auto-generated)
• Allow ^_ prefix for no-unused-vars (standard discard idiom: const { [k]: _, ...rest } = obj)
• Test-file override (**/*.test.{ts,tsx}) turns off no-explicit-any and no-require-imports — Vitest mock patterns rely on (mockFn as any).mockResolvedValueOnce(...) and would otherwise require touching ~95 lines across service test files

Real correctness fix

• add-edit-family.tsx — moved loadHousehold useCallback above the useEffect that calls it. The React Compiler-aware linter correctly flagged the previous ordering (effect at L112 calling a callback declared at L120) as a real hazard.

Cleanup

• Removed unused imports/vars in add-edit-family.tsx, imb-barcode.tsx, barcode-image.ts, word-document.ts
• eslint --fix stripped redundant eslint-disable directives from 5 test files

Targeted disables (with reason comments)

For legitimate patterns the new react-hooks/set-state-in-effect and preserve-manual-memoization rules flag:

• SSR hydration gates (setMounted(true) after first mount)
• Loading/error flags before async work (no reducer in place)
• Editor ↔ dialog state sync on open
• Debounce-then-reset autocomplete predictions
• React Compiler false positive on preserve-manual-memoization (inferred dep mismatch on stable setState identity)
• Intentional partial useCallback deps where an existing comment already explains why

Each disable is scoped to one line with a brief reason — not blanket file-level suppressions.

Test plan

• npm run lint → 0 errors, 0 warnings
• npm run test:run → 647/647 passing
• Smoke test the affected UI paths after merge: address labels, dev panel mount, template editor code/export dialogs, signin redirect, add/edit family load-by-contact

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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