fix: compositor theming and keybindings not applied at runtime

[BluePhi09]

What broke

Two regressions were introduced that caused window theming and keybindings to stop working entirely.

---

shell.qml — CompositorKeybinds was dropped from instantiation

CompositorKeybinds is not a singleton, so it must be explicitly instantiated in shell.qml. The block was accidentally removed during the merge:

CompositorKeybinds {
    id: compositorKeybinds
}

Without it, axctl config keybinds-batch was never called and no keybindings were ever registered.

---

CompositorConfig.qml — wrong axctl command used

applyCompositorConfigInternal() builds a semicolon-separated keyword string (e.g. keyword general:border_size 2 ; keyword decoration:rounding 8 ; ...) and needs to send it to axctl.

The merge replaced:

compositorProcess.command = [axctl, config, raw-batch, batchCommand];
compositorProcess.running = true;

with a call to CompositorTomlWriter.refresh(), which only writes the TOML file but never applies the changes to the live compositor.

axctl config raw-batch is the correct command for keyword strings — axctl config apply expects a JSON payload and rejects them with:

Error: invalid json payload: invalid character 'k' looking for beginning of value

Changes

File	Change
shell.qml	Re-add CompositorKeybinds instantiation
modules/services/CompositorConfig.qml	Restore axctl config raw-batch for the keyword batch command