Hotfix for 0.39.0 install failure: the `postinstall: patch-package`
hook + missing `patch-package` runtime dep + missing `patches/` in the
files array meant fresh `npm install` / `npx reasonix@latest` runs
crashed before the binary was usable. 0.39.0 has been deprecated on
npm and `latest` rolled back to 0.38.0.

Removes the patch-package machinery entirely — it can't work for a
published library since npm hoists `ink` out of reasonix's own
`node_modules`. The ink alt-screen render fix (#639) will return via
a forked ink + `npm:` alias (#663) in a later release.

Piggybacks three PRs that landed since 0.39.0:
- #632 fix(web): actionable web_search / web_fetch errors
- #661 feat(composer): Ctrl+X opens \$EDITOR
- #662 feat(composer): Ctrl+P / Ctrl+N picker navigation

…en (esengine#662)

When any of the three input-prefix pickers is active — slash command
(`/`), @-mention file picker, or slash-argument enum picker — Ctrl+P
and Ctrl+N now move the highlighted row up/down, matching what ↑/↓
already do. Falls through to prompt-history recall when no picker is
open, so single-key bash parity is preserved.

Previously Ctrl+P/N always handed off to history recall regardless of
picker state — reported as keymap inconsistency in issue esengine#647 (the
external-editor change is its own PR; this is the keymap half).

Implementation: `App.tsx` wraps `recallPrev` / `recallNext` from
`useInputRecall` in two memoized callbacks that consult atState /
slashArgMatches / slashMatches first (priority matching the existing
↑/↓ handler's order), and routes them into `PromptInput` instead of
the raw recall functions.

Closes esengine#647

Hotfix for 0.39.0 install failure: the `postinstall: patch-package`
hook + missing `patch-package` runtime dep + missing `patches/` in the
files array meant fresh `npm install` / `npx reasonix@latest` runs
crashed before the binary was usable. 0.39.0 has been deprecated on
npm and `latest` rolled back to 0.38.0.

Removes the patch-package machinery entirely — it can't work for a
published library since npm hoists `ink` out of reasonix's own
`node_modules`. The ink alt-screen render fix (esengine#639) will return via
a forked ink + `npm:` alias (esengine#663) in a later release.

Piggybacks three PRs that landed since 0.39.0:
- esengine#632 fix(web): actionable web_search / web_fetch errors
- esengine#661 feat(composer): Ctrl+X opens \$EDITOR
- esengine#662 feat(composer): Ctrl+P / Ctrl+N picker navigation