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>

packages/api/src/ai-client.ts

@@ -8,6 +8,9 @@ type AiSettings = {
   azureApiVersion?: string | null;
   aiMaxCompletionTokens?: number | null;
   aiTemperature?: number | null;
+  azureDalleDeployment?: string | null;
+  azureDalleEndpoint?: string | null;
+  azureDalleApiKey?: string | null;
 };
 
 /** Returns true if the settings have enough information to make an API call. */
@@ -31,6 +34,32 @@ export function createAiClient(settings: AiSettings): OpenAI {
   return new OpenAI({ apiKey: settings.azureOpenAiApiKey! });
 }
 
+/** Returns true if DALL-E image generation is configured. */
+export function isDalleConfigured(settings: AiSettings | null | undefined): boolean {
+  if (!settings) return false;
+  // DALL-E needs its own deployment (or a non-Azure key with model name)
+  if (settings.aiProvider === "azure") {
+    return !!(settings.azureDalleDeployment && (settings.azureDalleEndpoint || settings.azureOpenAiEndpoint) && (settings.azureDalleApiKey || settings.azureOpenAiApiKey));
+  }
+  // For direct OpenAI, the chat API key works for DALL-E too
+  return !!settings.azureOpenAiApiKey;
+}
+
+/** Creates an OpenAI client configured for DALL-E image generation. */
+export function createDalleClient(settings: AiSettings): OpenAI {
+  if (settings.aiProvider === "azure") {
+    const endpoint = settings.azureDalleEndpoint || settings.azureOpenAiEndpoint!;
+    const apiKey = settings.azureDalleApiKey || settings.azureOpenAiApiKey!;
+    return new AzureOpenAI({
+      endpoint,
+      apiKey,
+      apiVersion: settings.azureApiVersion ?? "2025-01-01-preview",
+      deployment: settings.azureDalleDeployment!,
+    });
+  }
+  return new OpenAI({ apiKey: settings.azureOpenAiApiKey! });
+}
+
 /** Turns raw API errors into actionable human-readable messages. */
 export function parseAiError(err: unknown): string {
   const msg = err instanceof Error ? err.message : String(err);