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/allocations/AllocationsClient.tsx

@@ -586,9 +586,12 @@ export function AllocationsClient() {
               </th>
               {visibleColumns.map((col) => {
                 const tooltips: Record<string, { tip: string; width?: string }> = {
+                  resource: { tip: "The person assigned to this time block. Grouped view clusters entries by resource." },
+                  project: { tip: "The project this allocation belongs to, identified by short code and name." },
                   role: { tip: "The role this allocation was created for. May differ from the resource's primary role." },
+                  dates: { tip: "Start and end date of this allocation period (inclusive)." },
                   hoursPerDay: { tip: "Planned working hours per calendar day for this allocation." },
-                  cost: { tip: "Resource LCR × hours per day. Reflects the cost of one day of work for this allocation." },
+                  cost: { tip: "Daily cost = resource LCR x hours per day. Total cost = daily cost x working days.", width: "w-72" },
                   status: { tip: "PROPOSED = requested · CONFIRMED = approved · ACTIVE = ongoing · COMPLETED = finished · CANCELLED = removed.", width: "w-72" },
                 };
                 const t = tooltips[col.key];