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/components/estimates/tabs/ExportsTab.tsx

@@ -9,6 +9,7 @@ import type {
   EstimateVersionView,
   EstimateWorkspaceView,
 } from "~/components/estimates/EstimateWorkspace.types.js";
+import { InfoTooltip } from "~/components/ui/InfoTooltip.js";
 import { formatDateLong, formatMoney } from "~/lib/format.js";
 
 const EXPORT_FORMATS: EstimateExportFormat[] = [
@@ -100,7 +101,7 @@ export function ExportsTab({
       <div className="rounded-3xl border border-gray-200 bg-white p-5 shadow-sm">
         <div className="flex flex-wrap items-start justify-between gap-4">
           <div>
-            <h2 className="text-sm font-semibold uppercase tracking-wide text-gray-600">Export delivery</h2>
+            <h2 className="text-sm font-semibold uppercase tracking-wide text-gray-600">Export delivery <InfoTooltip content="Generate downloadable files from the current estimate version. Each format includes demand lines, scope, and financial summaries." /></h2>
             <p className="mt-2 text-sm text-gray-500">
               Generate format-specific artifacts from the current version and download them directly from the stored serializer payload.
             </p>
@@ -125,7 +126,7 @@ export function ExportsTab({
 
       <div className="rounded-3xl border border-gray-200 bg-white shadow-sm">
         <div className="border-b border-gray-100 px-6 py-4">
-          <h2 className="text-sm font-semibold uppercase tracking-wide text-gray-600">Generated exports</h2>
+          <h2 className="text-sm font-semibold uppercase tracking-wide text-gray-600">Generated exports <InfoTooltip content="Previously generated export artifacts. XLSX/CSV contain tabular data; JSON is machine-readable; SAP/MMP are ERP integration formats." /></h2>
         </div>
         {exports.length === 0 ? (
           <div className="px-6 py-8">