## What happened

`format-drive /dev/mmcblk0 "My Card"` wipes and partitions the card, then fails at `mkfs.exfat` because it targets `/dev/mmcblk01`, which does not exist. The card is left partitioned but unformatted.

## Cause

In `default/bash/fns/drives`, `format-drive()` special-cases only `nvme`:

```bash
partition="$([[ $1 == *"nvme"* ]] && echo "${1}p1" || echo "${1}1")"
```

The rule is not nvme-specific: a device whose name **ends in a digit** separates the partition number with `p`. That covers `nvme0n1` -> `nvme0n1p1`, but also `mmcblk0` -> `mmcblk0p1` and `loop0` -> `loop0p1`.

Since the destructive steps (`wipefs`, `dd`, `parted`) all run *before* `mkfs.exfat`, the failure comes after the data is already gone.

## What was expected

SD cards format correctly, or the command fails before destroying anything.

## Steps to reproduce

With an SD card at `/dev/mmcblk0`:

```bash
format-drive /dev/mmcblk0 "Test"
# wipefs / dd / parted all succeed
# mkfs.exfat: /dev/mmcblk01: No such file or directory
```

## Fix

```bash
if [[ $1 =~ [0-9]$ ]]; then
  partition="${1}p1"
else
  partition="${1}1"
fi
```

Confirmed equivalent for the existing cases: `/dev/sda` -> `/dev/sda1`, `/dev/nvme0n1` -> `/dev/nvme0n1p1`, and now `/dev/mmcblk0` -> `/dev/mmcblk0p1`.

## System

- Omarchy 4.0.1-1
- `/usr/share/omarchy/default/bash/fns/drives`, line 50