[P1] Audit: UUID Generator lacks export and large-batch management

[baixiangcpp]

Imported from the byteflow.tools deep audit on 2026-06-22.

Problem: UUID Generator supports generating batches up to a large count, but large outputs are difficult to manage in the UI. There is no obvious file export, pagination, or structured output format for CSV/JSON.

Affected URL:

• https://byteflow.tools/en/uuid-generator

Reproduction steps:

1. Open UUID Generator.
2. Set quantity to a large value, such as 500 or 1000.
3. Generate IDs.
4. Try to copy all, scroll, and reuse the output in another tool.
5. Look for export options and formatting controls.

Expected behavior: large batches should be easy to copy, download, and format for CSV, JSON array, newline-delimited text, or quoted lists.

Actual behavior: generated IDs appear as a long text/list output with limited management controls.

Impact: QA and data seeding workflows are slower and more error-prone when many IDs are needed.

Proposed fix:

• Add Download as .txt, .csv, and .json.
• Add output format selector: newline, CSV, JSON array, quoted list.
• Add pagination or virtualized display for large batches.
• Add optional prefix/suffix templates if useful.
• Add copy confirmation and output count summary.

Acceptance criteria:

• Generating 1000 UUIDs remains responsive.
• Users can download outputs in at least txt and JSON formats.
• Output count is accurate.
• Copy All and Download produce matching data.
• No generated IDs are stored unless user explicitly opts in.

[baixiangcpp]

Closed as completed by the canonical BF audit backlog work. This older non-BF audit issue duplicates work now merged through PRs #209-#219, with the BF issues closed and guard/test coverage in place. The remaining non-duplicate follow-up is #7, which stays open because the upstream Next/PostCSS advisory is not fixed yet.