v2.6.1c (Lyra): Admin gebruikersbeheer opnieuw ontworpen + CLI reset

Nieuwe features:
- Admin gebruikerslijst met zoeken/filter op gebruikersnaam en rol
- Profiel bewerken pagina met wachtwoord wijzigen en rol wijzigen
- Nieuwe gebruiker aanmaken via aparte pagina
- CLI commando cli/reset-admin-password.php voor admin wachtword reset + lockout reset

Architectuur:
- /admin/users: lijst met zoekveld, rol filter, bewerk/verwijder acties
- /admin/users-edit?user=<naam>: profiel, wachtwoord, rol, verwijderen
- /admin/users-new: nieuwe gebruiker aanmaken
- AdminAuth::clearLockout() public methode voor CLI gebruik

Documentatie:
- guide/nl/en/admin-beheerder/gebruikers.md herschreven
- 15 nieuwe admin vertaalkeys in NL/EN/DE
- Release notes: docs/release-notes/v2.6.1c.md

Tests:
- Pentest: 30/30 geslaagd, 0 vulnerabilities
- WCAG 2.1 AA: 25/25 geslaagd, 100% compliance

guide/en/admin-beheerder/gebruikers.md

@@ -15,23 +15,63 @@ CodePress has four roles, defined in `AdminAuth::ROLE_PERMISSIONS`:
 
 Roles are displayed with their label via `AdminAuth::ROLE_LABELS`.
 
-## Adding a user
+## Users list (`/admin/users`)
 
-1. Go to **Users**
-2. Enter username
-3. Choose password (stored as bcrypt hash)
-4. Select a role
-5. Click **Add**
+The users list shows all users with their username, role, login email and creation date.
 
-## Editing a user
+### Search and filter
 
-- Change password (new bcrypt hash)
-- Change role (immediately affects visible routes and sidebar items)
+- **Search field**: search by username, email or author name
+- **Role filter**: filter by a specific role via the dropdown
+- Click **Filter** to apply the results
 
-## Deleting a user
+### Adding a new user
 
-- Not possible for own account
-- Confirm with password
+1. Click **New user** (top right of the list)
+2. Enter username, password (minimum 8 characters), email, author name and author email
+3. Select a role
+4. Click **Add user**
+5. You will be automatically redirected to the profile page of the new user
+
+## Editing a profile (`/admin/users-edit?user=<name>`)
+
+Click on a user in the list to edit their profile. The profile page contains three sections:
+
+### Profile information
+- Login email, author name and author email can be changed
+- The username cannot be changed
+
+### Change password
+- Enter a new password (minimum 8 characters)
+- Confirm the password
+- The password is stored as a bcrypt hash
+
+### Change role
+- Shows the current role with a colored badge
+- Select a new role from the dropdown
+- The change immediately affects the visible admin routes and sidebar items
+
+### Delete user (Danger zone)
+- Only visible for other users (not for your own account)
+- Confirmation via JavaScript dialog
+- After deletion you return to the users list
+
+## Admin password reset via CLI
+
+If the admin is locked out (e.g. due to brute-force lockout or forgotten password), the password can be reset via the CLI:
+
+```bash
+# Reset with a specific password
+php cli/reset-admin-password.php admin NewPassword123
+
+# Reset with an automatically generated password
+php cli/reset-admin-password.php admin
+```
+
+The command:
+- Changes the password (as a bcrypt hash)
+- Clears the brute-force lockout for the user
+- Displays the new password in the terminal
 
 ## Access control