feat(rhema-code): add the colors setting with four palettes

The stored `colors` key names a palette — rhema (the default,
Jadeite), aquamarine, black-and-white, or dracula — and the
Appearance page of /settings cycles it live, like the theme and
icon toggles beside it. Each palette carries a dark and a light
appearance under the existing `theme` key; dracula's light side is
derived, the official palette ships only dark.

The appearance decision moves off token comparison: Theme now
answers is_dark() from the ground/text luminance, so palettes
beyond the original two get the right per-profile fallback tones.

web/claw/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "rhema-claw-web",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "description": "Web client for the rhema claw's /v1 HTTP surface — one consumer, the public API is the contract.",
+  "scripts": {
+    "dev": "nuxt dev",
+    "build": "nuxt generate",
+    "preview": "nuxt preview",
+    "typecheck": "nuxt typecheck",
+    "postinstall": "nuxt prepare"
+  },
+  "dependencies": {
+    "markdown-it": "^15.0.2",
+    "nuxt": "^4.6.0",
+    "vue": "^3.5.43"
+  },
+  "devDependencies": {
+    "typescript": "^5.9.3",
+    "vue-tsc": "^3.1.4"
+  }
+}