chore: auto-update platform data (2026-05-04)

Delete duplicate lowercase variants (identical MD5) of 12 files
that prevented clean checkout on case-insensitive filesystems
(Windows, macOS).

Canonical chosen per upstream source code:
- Atari 2600 KV*.WAV: uppercase (stella2023 hardcode)
- Vectrex VEC_Minestorm.vec: lowercase (BizHawk hardcode)
- MSX MSX{,2,2EXT}.ROM: uppercase (fMSX hardcode, 6/7 platforms)
- Doom DOOM2.WAD: uppercase (matches dir convention)

Add aliases to stella2014 and clk profiles so resolution still
finds the canonical source. Correct retrodeck Vectrex casing to
match upstream. Merge Commodore/Vic-20 into VIC-20.

Add tests/test_no_case_collisions.py as a CI guard.

Closes #49

README.md

@@ -1,4 +1,6 @@
-# RetroBIOS
+<p align="center">
+  <img src=".github/assets/banner.png" alt="RetroBIOS" width="400">
+</p>
 
 Complete BIOS and firmware packs for Batocera, BizHawk, EmuDeck, Lakka, Recalbox, RetroArch, RetroBat, RetroDECK, RetroPie, and RomM.
 
@@ -27,7 +29,7 @@ Pick your platform, download the ZIP, extract to the BIOS path.
 
 | Platform | BIOS files | Extract to | Download |
 |----------|-----------|-----------|----------|
-| Batocera | 361 | `/userdata/bios/` | [Download](../../releases/latest) |
+| Batocera | 353 | `/userdata/bios/` | [Download](../../releases/latest) |
 | BizHawk | 118 | `Firmware/` | [Download](../../releases/latest) |
 | EmuDeck | 161 | `Emulation/bios/` | [Download](../../releases/latest) |
 | Lakka | 448 | `system/` | [Download](../../releases/latest) |
@@ -59,7 +61,7 @@ Full list with per-file details: **[https://abdess.github.io/retrobios/](https:/
 
 | Platform | Coverage | Verified | Untested | Missing |
 |----------|----------|----------|----------|---------|
-| Batocera | 361/361 (100.0%) | 361 | 0 | 0 |
+| Batocera | 352/353 (99.7%) | 351 | 1 | 1 |
 | BizHawk | 118/118 (100.0%) | 118 | 0 | 0 |
 | EmuDeck | 161/161 (100.0%) | 161 | 0 | 0 |
 | Lakka | 448/448 (100.0%) | 448 | 0 | 0 |
@@ -122,6 +124,10 @@ To keep packs accurate, each file is checked against the emulator's source code.
 <a href="https://github.com/monster-penguin"><img src="https://avatars.githubusercontent.com/u/266009589?v=4" width="50" title="monster-penguin"></a>
 
 
+## Community tools
+
+- [BIOS Preservation Tool](https://github.com/monster-penguin/BIOS-Preservation-Tool) by [monster-penguin](https://github.com/monster-penguin) - scan, verify, and stage your own BIOS collection using RetroBIOS hash metadata
+
 ## Contributing
 
 See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
@@ -130,4 +136,4 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
 
 This repository provides BIOS files for personal backup and archival purposes.
 
-*Auto-generated on 2026-04-02T13:38:26Z*
+*Auto-generated on 2026-05-04T08:31:44Z*