Fix GTK keyboard event crash before initialization#50
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GTK can deliver keyboard events during startup or focus changes before the keyboard state is initialized. The event handler previously dereferenced the missing state, which could cause a null pointer crash and trigger Gdk-CRITICAL from gdk_keymap_get_direction: assertion 'GDK_IS_KEYMAP (keymap)' failed. Validate the keyboard state before processing events and safely ignore events received before initialization completes. Normal behavior is unchanged once the backend is ready.
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GTK can deliver keyboard events during startup or focus changes before the keyboard state is initialized. The event handler previously dereferenced the missing state, which could cause a null pointer crash and trigger Gdk-CRITICAL from gdk_keymap_get_direction: assertion 'GDK_IS_KEYMAP (keymap)' failed.
Validate the keyboard state before processing events and safely ignore events received before initialization completes. Normal behavior is unchanged once the backend is ready.