[Performance] `loadEntries(limit)` still parses the entire history file

[404-Page-Found]

Description

loadEntries(limit) returns only the most recent entries, but it still reads and parses the full JSONL history file before slicing down to the requested amount.

Location

• src/history/store.ts:19
• src/history/store.ts:33

Problematic code

const raw = await readFile(historyPath, 'utf-8');
const lines = raw
  .split('\n')
  .map((line, index) => ({ line, lineNumber: index + 1 }))
  .filter(({ line }) => line.trim().length > 0)
  .reverse();

Suggested fix

Keep the current behavior but avoid full-file parsing when a small limit is requested. Even a simpler incremental approach that scans from the end of the file would help.

Impact

As history grows, commands like history and style-profile generation can do more work than necessary.