Matt 2d0a49e0d1 fix(P1): input validation hardening for client API — F6
Pre-audit /api/v1/clients accepted:
  - contacts[].value='not-an-email' with channel='email' → silent bounce
  - fullName='   ' (whitespace-only) → blank-chip renders everywhere
  - fullName='Hidden<ZWSP>Char<ZWSP>Name' (zero-width chars) → search blind spot

This commit:
  1. New `humanTextSchema()` helper in src/lib/validators/text.ts that
     strips invisible/bidi/control chars, trims, then length-checks.
  2. `fullName` switched to `humanTextSchema({ min: 1, max: 200 })`.
  3. `contactSchema` gains a `superRefine` requiring valid email format
     when `channel === 'email'`.

Verified live:
  - invalid email      → 400 "Must be a valid email address." (field-scoped)
  - whitespace name    → 400 "Too small: expected string to have >=1 characters"
  - zero-width chars   → stored as cleaned "HiddenCharName"
  - valid baseline     → 201

Followup tasks (deferred): apply `humanTextSchema` to yachts/companies/
interests/notes/reminders names; audit render paths for XSS-via-stored-
HTML (default React escaping is safe; pdfme/email-merge surfaces need a
spot-check).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-14 22:44:15 +02:00
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