feat: project cover art with AI generation, branding rename, RBAC fix, computation graph

- Add DALL-E cover art generation for projects (Azure OpenAI + standard OpenAI)
- CoverArtSection component with generate/upload/remove/focus-point controls
- Client-side image compression (10MB input → WebP/JPEG, max 1920px)
- DALL-E settings in admin panel (deployment, endpoint, API key)
- MCP assistant tools for cover art (generate_project_cover, remove_project_cover)
- Rename "Planarchy" → "plANARCHY" across all UI-facing text (13 files)
- Fix hardcoded canEdit={true} on project detail page — now checks user role
- Computation graph visualization (2D/3D) for calculation rules
- OG image and OpenGraph metadata

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/src/app/(app)/admin/vacations/page.tsx

@@ -1,7 +1,7 @@
 import { PublicHolidayBatch } from "~/components/vacations/PublicHolidayBatch.js";
 import { EntitlementManager } from "~/components/vacations/EntitlementManager.js";
 
-export const metadata = { title: "Vacation Management — Planarchy" };
+export const metadata = { title: "Vacation Management — plANARCHY" };
 
 export default function AdminVacationsPage() {
   return (