refactor: remove core-ui from main (scaffoldable via gen core-package ui)

Removal across all three consumers:
- apps/storybook: strips @repo/core-ui dep, clears stories glob (now []),
  removes globals.css import from preview.ts
- apps/web-next: strips @repo/core-ui dep + transpilePackages entry
- apps/web-tanstack: strips @repo/core-ui dep
- packages/core-ui: deleted entirely (28 files)

No app pages needed surgery — neither web-next nor web-tanstack source
files imported @repo/core-ui directly. The storybook app referenced it
only via the stories glob and the globals.css preview import.

Gates: 40/40 tasks successful, all 4 e2e byte-identical reconstructions
pass (realtime, events, trpc, ui).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/storybook/.storybook/main.ts

@@ -2,7 +2,7 @@ import type { StorybookConfig } from "@storybook/react-vite";
 
 const config: StorybookConfig = {
   framework: "@storybook/react-vite",
-  stories: ["../../../packages/core-ui/src/**/*.stories.@(ts|tsx)"],
+  stories: [],
   addons: ["@storybook/addon-essentials"],
   docs: {
     autodocs: "tag",

apps/storybook/.storybook/preview.ts

@@ -1,5 +1,4 @@
 import type { Preview } from "@storybook/react";
-import "@repo/core-ui/styles/globals.css";
 
 const preview: Preview = {
   parameters: {

apps/storybook/package.json

@@ -12,9 +12,7 @@
     "test-storybook": "test-storybook --url http://localhost:6006",
     "test:stories": "concurrently -k -s first -n 'SB,TEST' -c 'magenta,blue' 'pnpm exec http-server storybook-static --port 6006 --silent' 'pnpm exec wait-on tcp:6006 && pnpm test-storybook'"
   },
-  "dependencies": {
-    "@repo/core-ui": "workspace:*"
-  },
+  "dependencies": {},
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
     "@repo/core-typescript": "workspace:*",

apps/web-next/next.config.mjs

@@ -8,7 +8,6 @@ const nextConfig = {
     "@repo/core-api",
     "@repo/core-cms",
     "@repo/core-shared",
-    "@repo/core-ui",
     "@repo/marketing-pages",
     "@repo/media",
     "@repo/navigation",

apps/web-next/package.json

@@ -19,7 +19,6 @@
     "@repo/core-api": "workspace:*",
     "@repo/core-cms": "workspace:*",
     "@repo/core-shared": "workspace:*",
-    "@repo/core-ui": "workspace:*",
     "@repo/marketing-pages": "workspace:*",
     "@repo/media": "workspace:*",
     "@repo/navigation": "workspace:*",

apps/web-tanstack/package.json

@@ -15,7 +15,6 @@
     "@repo/blog": "workspace:*",
     "@repo/core-api": "workspace:*",
     "@repo/core-shared": "workspace:*",
-    "@repo/core-ui": "workspace:*",
     "@repo/marketing-pages": "workspace:*",
     "@repo/navigation": "workspace:*",
     "@sentry/node": "^10.52.0",