Vamooses Dye Studio

Complete rewrite. The colored vials look the same; everything underneath is new.

**New: Stock tab**
- Set per-color-group target counts (e.g. "3 of every red"), with per-dye
  overrides for the specific dyes you want more of.
- Deficit roll-up across bags, bank, reagent bank, and warband bank.
- One-click Restock-and-Send-to-AH: Buy mode ships missing dyes to an
  Auctionator shopping list; Craft mode ships the cheapest herbs needed to
  craft them. Auctionator is a soft dependency.
- Master +/- bumps every group target at once (shift-click for x10).
- Per-dye reset button reverts an override back to the group default.

**New defaults**
- "Replace Blizzard's dye picker" is on by default for new installs.
- Custom palette and Canvas loadout creation pre-fills "Palette N" /
  "Loadout N" with an auto-incrementing number; press Enter to accept.

**Live dye mode polish**
- Focused slot now has a gold border matching the Canvas channel picker.
- Cost preview tracks Blizzard's dye-bottle spend as you preview changes.

**Tabs:** Colors / Custom / Theme / Stock / Herbs / Canvas.

**Migration**
- Your custom palettes carry forward from v1.x.
- Other state (cart, loadouts, dyeable-item cache, minimap/panel position)
  resets to defaults on first launch.

**Slash commands:** `/vds` / `/dyes` (toggle), `/vds debug`, `/vds minimap`,
`/vds hardreset`.