Add persistent terminal aliases

[cursor]

Summary

• Added persistent shell-style terminal aliases with alias, unalias, which, tab completion, and localStorage persistence.
• Expanded aliases before command execution, including aliases with arguments and pipeline aliases like h | grep repo.
• Documented the workflow in the README and terminal help/man entries.

Issue

Title

Add persistent terminal aliases to improve terminal emulation

Problem

The terminal exposed an alias command, but it only printed a static placeholder and did not behave like a real shell. Visitors could not create shortcuts for common commands, inspect aliases, persist them across reloads, or remove them.

Proposed improvement

Implement a focused alias system that supports alias name='command', alias, alias name, unalias name, unalias -a, alias-aware which, command-name tab completion, and loop-safe expansion before normal command and pipeline execution.

Acceptance criteria

• Users can create, list, inspect, and remove aliases from the terminal.
• Aliases persist across page reloads using browser localStorage.
• Aliases expand before executing normal commands and pipeline segments.
• Alias loops are detected and reported without hanging the terminal.
• Unit tests cover parsing, formatting, expansion, and loop detection.

Testing

• pnpm check passed via pre-push hook (lint, format check, coverage, build): 70 tests passed, branch coverage 85.26%.
• Manual browser walkthrough passed: created an alias, verified which, reloaded to confirm persistence, ran pipeline and argument aliases, listed aliases, removed one, and confirmed it no longer executed.

Walkthrough artifact

• /opt/cursor/artifacts/persistent_terminal_aliases_walkthrough.mp4