### System details

Omarchy: 4.0.0-1 Hyprland: 0.56.2 (v0.56.2, commit efb50993780079460b0cbed1363e2166a2de1d9f), Kernel: 7.1.8-arch1-3

### What's wrong?

## What happened

When a workspace has a maximized or fullscreened window on top of other windows, `omarchy screenshot` (and `omarchy capture screenshot windows`) still lets you select rectangles for the windows underneath, even though they are not visible on screen. The picker "snaps" to a window that is completely covered.

## What I expected

Only the maximized/fullscreen window's rectangle should be selectable while it's covering the workspace, since anything underneath isn't actually visible.

## Steps to reproduce

1. Open two or more windows on the same workspace.
2. Maximize one (`SUPER + ALT + F`, i.e. `hl.dsp.window.fullscreen({ mode = "maximized" })`).
3. Run `omarchy screenshot` (or the "windows" capture mode) and hover/click where a covered window used to be.
4. The picker highlights and lets you select the hidden window's old rectangle, not just the maximized window on top.

## Root cause

`bin/omarchy-capture-region`'s `window_rects()` builds selectable rectangles from `hyprctl clients -j`, filtering only on `hidden != true`:

```bash
window_rects() {
  hyprctl clients -j | jq -r --arg ws "$(active_workspace)" \
    '[.[] | select(.workspace.id == ($ws | tonumber) and .hidden != true) | "\(.at[0]),\(.at[1]) \(.size[0])x\(.size[1])"] | unique[]'
}
```

Hyprland's `hidden` field does not track occlusion by a fullscreen/maximized sibling — a window covered by a maximized window on the same workspace still reports `hidden: false` in `hyprctl clients -j`. So `window_rects()` (used by `get_rectangles`, `geo_at_cursor`, and the `--select-window` Tab-cycling) keeps offering rectangles for windows that aren't actually visible.

Confirmed against the current `bin/omarchy-capture-region` on the `quattro` branch — the bug is present in the latest source, not just an older release.

## Suggested fix

In `window_rects()`, when any window on the workspace is fullscreen/maximized, only emit that window's rectangle:

```bash
window_rects() {
  hyprctl clients -j | jq -r --arg ws "$(active_workspace)" '
    [ .[] | select(.workspace.id == ($ws | tonumber) and .hidden != true) ] as $ws_windows |
    if ($ws_windows | any(.fullscreen == 1 or .fullscreen == true)) then
      $ws_windows | map(select(.fullscreen == 1 or .fullscreen == true))
    else
      $ws_windows
    end |
    map("\(.at[0]),\(.at[1]) \(.size[0])x\(.size[1])") | unique[]
  '
}
```

(`fullscreen` is an int in some Hyprland versions and a bool in others, hence checking both.)