Update TogglePanelAndFocus and related components to use open/focused flags.
Changed TogglePanelAndFocus from currently_open to open+focused flags.
Parser accepts optional [open] [focused] arguments.
Interactive mode toggles between open+focus and closed/unfocused.
Keymap updates: F/C/V in panel modes close panels when focused.
Model initialization: Virtual categories _Index/_Dim default to None
axis, regular categories auto-assign Row/Column/Page.
App test context updated with visible_rows/visible_cols.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/Qwen3.5-35B-A3B-GGUF:Q5_K_M)
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