feat(tui): make dialog keybinds configurable (#6143)

[CasualDeveloper]

Summary

• Add configurable keybinds for dialog actions (delete, rename, favorite, etc.)
• Change session_rename default from none to ctrl+r

Closes #6143

New Keybind Options

Option	Default	Description
session_delete	ctrl+d	Delete session
session_rename	ctrl+r	Rename session
stash_delete	ctrl+d	Delete stash entry
model_provider_list	ctrl+a	Open provider list
model_favorite_toggle	ctrl+f	Toggle model favorite

Usage

{
  "keybinds": {
    "session_delete": "super+d",
    "session_rename": "super+r"
  }
}

Note: If another PR touching packages/sdk/openapi.json merges first, rebase and rerun bun ./script/generate.ts, then update packages/sdk/js/src/v2/gen/types.gen.ts.

[CasualDeveloper]

Updated to address Copilot review feedback:

• Changed ![0] to ?.[0] for safer keybind access
• Updated DialogSelect type to accept optional keybind (allows disabling via "none")
• Added filtering for undefined keybinds in the component

This PR also closes #3262.

[rekram1-node]

Yep these should all be configurable, good catch

[rekram1-node]

/review

[github-actions[bot]]

lgtm

[rekram1-node]

this should be good to merge, ill do so after xmas

[CasualDeveloper]

Noted, thanks. Will continue rebasing on top of release tags as they're set to make it easier for ya.

[CasualDeveloper]

/review

[CasualDeveloper]

this should be good to merge, ill do so after xmas

hey Aiden, this still on track to merge soon? ;)

[rekram1-node]

yeah lemme test when i get home

you have a few prs but im struggling to keep up, consider joining our discord or dming me somewhere to get my attention on these!

[CasualDeveloper]

consider joining our discord or dming me somewhere to get my attention on these!

done and done :D