Studio Notebook: vision, Phase 1 designs, and working prototype

- VISION.md: the full studio-backbone product vision (craft core, operations,
  selling, daily driver), Bonna's approved design decisions, and phasing
- design/: two clickable Phase 1 mockups (moonlit palette, CSS-only tabs)
- prototype/: zero-dependency local app (Node built-ins + SQLite) — Today with
  jot-first capture + subtask outliner, Clay & Glazes library, fill-and-go
  Firing Log with emoji unload ratings feeding evidence tables, Pieces with
  core line/tiles/one-of-a-kind + money card, Files with per-piece attachment,
  Sourcing with price ledger + live supplier search links (9 suppliers seeded)
- CLAUDE.md: access notes updated for the provisioned site + this repo's state

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Start Studio Notebook.command

@@ -0,0 +1,6 @@
+#!/bin/zsh
+# Double-click me to start the Studio Notebook 🌙
+cd "$(dirname "$0")"
+open -g "http://localhost:6161" 2>/dev/null || true
+(sleep 1 && open "http://localhost:6161") &
+exec node prototype/server.mjs