### Summary
In Omarchy 4, the default Hyprland window rules force the main Steam client window to float at a fixed size of `1100x700`, while `suppress_event = "maximize"` is globally configured in `windows.lua`. This causes Steam's main store/library window to feel cramped on high-DPI/larger displays, and clicking the CSD maximize button inside the Steam client fails to maximize the window.

### Current Implementation
In `/usr/share/omarchy/default/hypr/apps/steam.lua`:
```lua
o.window("steam", { float = true, idle_inhibit = "fullscreen" })
o.window({ class = "steam", title = "Steam" }, { center = true, size = { 1100, 700 } })
```

And in `/usr/share/omarchy/default/hypr/windows.lua`:
```lua
o.window(".*", { suppress_event = "maximize" })
```

### Problem
Because Steam runs under XWayland with custom Client-Side Decorations (CSD), clicking the maximize button within Steam's title bar does nothing, and the initial 1100x700 geometry leaves the store and library narrow with large black borders unless the user manually invokes `SUPER + F` or overrides the rule in `~/.config/hypr/hyprland.lua`.

### Proposed Solution
Allow the main Steam client (`title = "^Steam$"`) to default to tiled mode (`tile = true`) or provide an easy toggle, while keeping auxiliary popups and the Friends List floating:

```lua
o.window("steam", { float = true, idle_inhibit = "fullscreen" })
o.window({ class = "steam", title = "^Steam$" }, { tile = true })
o.window({ class = "steam", title = "Friends List" }, { size = { 460, 800 }, float = true })
```