Efficient mouseless functionality

[keyserj]

Is your feature request related to a problem? Please describe.
I want to be able to exercise ameliorate's functionality without a mouse - both for accessibility, and for efficiency. Specifically, at least the following should be mouseless:

• Add node
• Edit node text
• Edit selection's score already done, type 0-9 or dash when selecting a part
• View score's claim
• Go back to problem mapping from claim view
• Select node up/down/left/right of current selection
• Select edge up/down/left/right of current selection

Note: most of these can be accomplished through Vimium's [fF]-to-click functionality, but that's not as smooth as directly having shortcuts for these (and requiring Vimium for accessibility is probably not ideal).

Describe the solution you'd like
VIM-mode sounds pretty awesome (e.g. "cc" to change node text, "cs" change score, "apj" add problem below, "" to enter VIM-mode). Perhaps more common hotkeys like ctrl-[char] would be good for non-vimmers too.

Describe alternatives you've considered

Additional context

Technical ideas
We already use react-hotkeys-hook, which seems decent enough for this

[keyserj]

Some more thoughts:

• j/k to navigate to nearest parent/child, h/l to navigate to nearest left/right node
  • how to navigate to edges? probably gj/gk
  • arrow keys easier to learn for newbies, but maybe worse when things like direction are needed elsewhere?
    • g[down]/g[up] seem not ideal
    • a[down]node-char/a[up]node-char seem not ideal
    • also they don't fit in the "[c]har that makes sense for char/vim-like command"
  • this should also work for navigating table cells
• enter to focus selected node's input
  • if focused, enter to blur, shift + enter to add newline
• shortcut to create parent/child
  • not sure what's best... possibly:
    • cp[node-type-char]/cc[node-type-char] for create parent/child
      • requires tracking a vim-like stack that can be escaped (and esc to deselect would have to be not possible unless nothing in vim-stack)
        • probably would want to add visuals to indicate what can be pressed, when the current stack is, option to turn off
    • cj[node-type-char]/ck[node-type-char] for create [direction]
    • aj[node-type-char]/ak[node-type-char] for add [direction]
      • a is closer to OG vim "append", whereas c is used for "change"
    • alt+p+[node-type-char]/alt+c+[node-type-char] for create parent/child?
      • hard to do triple shortcut actions that need to be held at the same time
      • but is nice that doesn't conflict with vimium i.e. require insert mode for vimium
  • what about when selecting a details/table node, not a diagram node?
    • maybe the add button itself could put "[p]arent"/"[c]hild" + "[n]ode-type-char" above/below itself
      • above if odd in container, below if even? to avoid text overlap
      • or could be within the button too, temporarily replacing the icon