fix(nix): include apps/shared in TUI source filter

[archdex-art]

Fixes #67056

Adds apps/shared to the dirs list in nix/tui.nix so that the Nix TUI derivation includes the local workspace dependency.

[alt-glitch]

This was generated by AI during triage.

Duplicate of #67082: the live one-line Nix TUI source-filter patch is byte-equivalent. #67082 remains the earlier open implementation.

[teknium1]

Thanks for the focused fix. The premise is confirmed on current main: nix/tui.nix:4 filters the TUI source to only ui-tui, while ui-tui/package.json:22 declares @hermes/shared as a file:../apps/shared dependency and ui-tui/src/app/slash/commands/topup.ts:1 imports from it. nix/lib.nix:221-225 documents that such workspace dependencies must be included in dirs.

This patch is byte-equivalent to the earlier open implementation in #67082, as noted in the existing triage comment. No code-level correction is requested.

Automated hermes-sweeper review.