feat(contact): real working form with Apps Script backend (3 sub-tasks)
4.9a: Contact.astro (v6-contact enhanced)
- 2 variants: 'prompt' (1 input + ENTER, for home) + 'full' (5 fields, for /contact)
- Smart-parses prompt input (phone vs name detection)
- Toast feedback on submit (success/error, 5s auto-hide)
- Dev-mode aware (no endpoint = console.log + 'dev mode' toast)
4.9b: apps-script/contact-form/ (USER DEPLOYS)
- Code.gs: doPost() handler → 3 actions:
1. Append to Google Sheet (SHEET_ID from Script Properties)
2. Send email via MailApp to RECIPIENT_EMAIL
3. Send LINE Notify via UrlFetchApp
- Returns {ok, id} or {ok:false, error} as JSON
- Includes testDoPost() for testing in Apps Script editor
- README.md: 6-step deploy guide (Script Properties + Sheet + LINE token)
with security notes + cost breakdown
4.9c: src/lib/contact-submit.ts
- Reads PUBLIC_CONTACT_ENDPOINT from .env
- Empty/missing = dev mode (console.log + 300ms mock latency)
- Set = POST JSON to endpoint
- Exports submitContact() + isDevMode() for Contact.astro to use
Refs: .hermes/plans/2026-06-13_124000-moreminimore-v7-5-migration.md Task 4.9a-c
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