feat(mail): make notification failures non-fatal

Add App\Support\SafeNotifier that wraps $notifiable->notify() in a
Throwable guard with a logged warning, so SMTP outages (the current
Gmail 535 errors) no longer propagate as a 500 to the user. Apply to
the two hot paths that were still unprotected: CommentController
(new comment, reply, like) and RegisteredUserController (super-admin
registration alert). User::sendEmailVerificationNotification() is
wrapped inline for the same reason.

Also add docs/mail-setup.md covering the three delivery options:
Gmail app password (quick), Mailgun, Postmark — with the exact .env
keys for each.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

docs/mail-setup.md

@@ -0,0 +1,62 @@
+# Mail setup
+
+Mail failures are now non-fatal — a down SMTP will log a warning in
+`data/logs/laravel.log` but will NOT 500 the user. Still, delivery is a
+feature; here's how to fix the current Gmail 535 auth errors.
+
+## Option A — Gmail App Password (quickest, free, ~500 sends/day)
+
+1. On `[email protected]`:
+   - Enable 2-Step Verification (Google Account → Security).
+   - Generate an **App Password** (Security → App passwords → "Mail", "Other: TAKEONE").
+   - Copy the 16-character password Google shows (no spaces).
+
+2. `.env`:
+   ```env
+   MAIL_MAILER=smtp
+   MAIL_HOST=smtp.gmail.com
+   MAIL_PORT=587
+   MAIL_USERNAME=platformtakeone@gmail.com
+   MAIL_PASSWORD=xxxx-xxxx-xxxx-xxxx   # the app password, no quotes needed
+   MAIL_ENCRYPTION=tls
+   MAIL_FROM_ADDRESS=platformtakeone@gmail.com
+   MAIL_FROM_NAME="TAKEONE"
+   ```
+
+3. `php artisan config:clear && php artisan queue:restart`
+
+4. Smoke test:
+   ```bash
+   php artisan app:resend-verification --user=<id-of-an-unverified-user>
+   ```
+
+## Option B — Mailgun (recommended for production)
+
+```env
+MAIL_MAILER=mailgun
+MAILGUN_DOMAIN=mg.takeone.bh
+MAILGUN_SECRET=key-...
+MAILGUN_ENDPOINT=api.eu.mailgun.net  # or api.mailgun.net for US region
+MAIL_FROM_ADDRESS=no-reply@takeone.bh
+MAIL_FROM_NAME="TAKEONE"
+```
+
+## Option C — Postmark (also fine)
+
+```env
+MAIL_MAILER=postmark
+POSTMARK_TOKEN=...
+MAIL_FROM_ADDRESS=no-reply@takeone.bh
+MAIL_FROM_NAME="TAKEONE"
+```
+
+## Resend verification to users whose first email failed
+
+```bash
+# One specific user
+php artisan app:resend-verification --user=42
+
+# Everyone still unverified (dry-run first)
+php artisan app:resend-verification --all-unverified --dry-run
+php artisan app:resend-verification --all-unverified
+```