Batch rename with patterns and variables

[Spectra47]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

🧠User story: As an organizer, I want to rename many files with patterns so that I can clean naming quickly.

💡Proposal: A batch rename dialog supporting variables and live preview.

✨Acceptance criteria: Variables: {name} {ext} {num} {date} with zero‑padding; regex replace mode.
Live preview for all selected items; collision handling (skip/replace/keep both).
Dry‑run confirmation step before execution.

Why do you want this feature?

Manual renaming is slow and error‑prone.

Additional information

🤍🤝Notes/Tech hints: Keep it offline and deterministic; remember last pattern per session.
Other files explorers offer naming patterns—target parity.

[Aga-C]

Have you used Fossify File Manager before raising this issue? There's already batch renaming.