Archive account-settings change, sync specs

All 37 tasks complete. Synced delta specs to main:
- New: openspec/specs/account-settings/
- Updated: openspec/specs/journal-auth/

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

openspec/changes/account-settings/proposal.md

@@ -1,32 +0,0 @@
-## Why
-
-Users have no way to manage their account after registration. There's no
-settings page to edit their profile, manage passkeys, change email, or delete
-their account. Passkey count currently shows on the home page as a stopgap,
-but it belongs in a dedicated settings area.
-
-## What Changes
-
-- **Account settings page** (`/settings`): central place for account management
-- **Profile editing**: update display name and bio
-- **Email change**: update email with verification via magic link
-- **Passkey management**: view registered passkeys (device type, date added),
-  add new passkeys, delete existing ones
-- **Account deletion**: delete account and all associated data with confirmation
-- Move passkey status display from home page to settings
-
-## Capabilities
-
-### New Capabilities
-- `account-settings`: Settings page with profile, security, and account sections
-
-### Modified Capabilities
-- `journal-auth`: Passkey management moves from home page prompt to settings;
-  add passkey delete functionality
-
-## Impact
-
-- **Files**: New route `apps/journal/app/routes/settings.tsx`, API routes for
-  profile update, email change, passkey delete, account delete
-- **Database**: No schema changes — uses existing users and credentials tables
-- **Routes**: Must register new routes in `apps/journal/app/routes.ts`