Password entry is not focused by default

### What Happened?

Password entry is not focused by default when Greeter appears on OS 9 Daily, although the intended code exists:

https://github.com/elementary/greeter/blob/3364dba5393652684883f1194eafb6112f94f08a/src/Cards/UserCard.vala#L162-L169

You need to manually focus on it to start typing your password.

### Steps to Reproduce

1. Boot OS 9 Daily
2. See the password entry is not focused by default when Greeter appears

### Expected Behavior

Password entry should be focused by default.

### OS Version

Early Access

### OS Architecture

amd64 (on most hardwares)

### Session Type

Secure Session (Wayland, This is the default)

### Software Version

Early Access or Compiled from git

### Log Output

```shell

```

### Hardware Info

_No response_

Start in src/Cards/UserCard.vala around lines 162-169, where the intended password-entry focus logic is referenced. Reproduce the issue by booting OS 9 Daily and checking the Greeter when it appears; done means the password entry is focused automatically and accepts typing without manual focus.

Written by the indexing model from the issue text.