VHBB theme for VitaGram

Source project: Vita Homebrew Browser (VHBB)
Author: devnoname120 and VHBB contributors
https://github.com/devnoname120/vhbb

The source PNGs in source/ are from VHBB's assets/spr directory:
img_itm_panel.png, img_itm_panel_highlight.png, img_catbar.png,
img_dialog_msg_bg.png.
These images and their adapted surfaces/header are licensed under
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International.
https://creativecommons.org/licenses/by-nc-sa/4.0/
The original license text is included as LICENSE.txt.

Changes: converted panel gradients to rounded 9-slice textures at VitaGram
sizes; removed the white label band to retain readable white text; adjusted
focus brightness; scaled and darkened the header. Wallpaper is newly drawn
without VHBB branding. Icons/controller atlases and fonts use VitaGram's
existing resources and their existing licenses. Segoe UI is not included.

Regenerate with assets/VitaGram_UI_Assets_v1/generate_vhbb_theme.py (Pillow).
No endorsement by VHBB's authors is implied.
