feat: scope + un-bundle the plugin; @unom/ui SPA; custom-emulator editor

Reliability + correctness pass on the packaging and UI.

Packaging — drop the self-contained bundle:
- Rename to `@punktfunk/plugin-rom-manager` (scoped). An unscoped package can't
  be split across registries, which is the only reason bundling effect + the SDK
  into every plugin seemed necessary. Scoped names resolve from one scope-map, so
  the plugin depends on `@punktfunk/host` + `effect` as SHARED (hoisted) deps —
  no duplication, no ~1 MB effect copy per plugin. Build is back to plain `tsc`.
  (Runner-side discovery of `@punktfunk/plugin-*` shipped in @punktfunk/host 0.1.1.)

UI — use the console's design system so it reads as family:
- SPA rebuilt on @unom/style tokens + Tailwind v4 + the console's exact theme
  (violet chrome, Geist, card/button vocabulary). Build-time only → static assets
  in dist/ui, no @unom runtime dep. Skips @unom/ui's AnimatedButton/Card, which
  statically import ~7 MB of UI sound assets — same look, 416 KB dist/ui.
- Add a custom-emulator editor (Emulators page) writing config.emulators — you can
  now add a launcher Punktfunk doesn't ship a definition for.
- Fix brand capitalization to "Punktfunk" in all UI copy + docs.

Install docs + CI updated for the scoped `bun add @punktfunk/plugin-rom-manager`
flow. 48 engine tests green; backend + UI typecheck + biome clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -1,5 +1,6 @@
-# CI for punktfunk-plugin-rom-manager (Gitea Actions). `bun install` resolves `@punktfunk/host` from
-# the Gitea npm registry (scope mapping in bunfig.toml). Publish runs on a `v*` tag.
+# CI for @punktfunk/plugin-rom-manager (Gitea Actions). Installs resolve `@punktfunk/*` and `@unom/*`
+# (the SPA's design system) from the Gitea npm registry via the bunfig scope maps; `effect` comes from
+# npm. The GITEA_NPM_TOKEN secret authenticates registry reads. Publish runs on a `v*` tag.
 name: CI
 
 on:
@@ -16,6 +17,8 @@ jobs:
       - uses: oven-sh/setup-bun@v2
         with:
           bun-version: latest
+      - name: Registry auth
+        run: echo "//git.unom.io/api/packages/unom/npm/:_authToken=${{ secrets.GITEA_NPM_TOKEN }}" > ~/.npmrc
       - name: Install
         run: bun install --frozen-lockfile
       - name: Lint & format
@@ -24,14 +27,12 @@ jobs:
         run: bunx tsc --noEmit
       - name: Test (engine)
         run: bun test
-      - name: Build backend
-        run: bun run build
-      - name: Build SPA
-        run: bun run build:ui
+      - name: Build backend + SPA
+        run: bun run build:all
       - name: Typecheck (UI)
         working-directory: ui
         run: bunx tsc --noEmit
-      - name: Bundle sanity — plugin default export is a valid PluginDef
+      - name: Sanity — plugin default export is a valid PluginDef
         run: |
           bun -e 'import p from "./dist/index.js"; const d = p.default; if (d?.name !== "rom-manager" || typeof d?.main !== "function") { console.error("bad default export", d); process.exit(1); } console.log("ok:", d.name)'
 
@@ -44,13 +45,11 @@ jobs:
       - uses: oven-sh/setup-bun@v2
         with:
           bun-version: latest
+      - name: Registry auth
+        run: echo "//git.unom.io/api/packages/unom/npm/:_authToken=${{ secrets.GITEA_NPM_TOKEN }}" > ~/.npmrc
       - name: Install
         run: bun install --frozen-lockfile
       - name: Build (backend + SPA)
         run: bun run build:all
       - name: Publish to the Gitea npm registry
-        env:
-          NPM_TOKEN: ${{ secrets.GITEA_NPM_TOKEN }}
-        run: |
-          npm config set //git.unom.io/api/packages/unom/npm/:_authToken "$NPM_TOKEN"
-          npm publish --registry https://git.unom.io/api/packages/unom/npm/
+        run: npm publish --registry https://git.unom.io/api/packages/unom/npm/