refactor: rename Planarchy to CapaKraken (branding only)

User-facing rename across 20 files:
- Layout title/meta: "CapaKraken — Resource & Capacity Planning"
- Sidebar logo: "CapaKraken" with "RESOURCE & CAPACITY PLANNING"
- Sign-in page: "CapaKraken Control Center", "Sign in to CapaKraken"
- PWA manifest: name + short_name
- PDF reports: footer text
- Install prompt: "Install CapaKraken"
- AI assistant system prompt
- Webhooks test payload
- Email subject lines
- Tooltips, descriptions, empty states

NOT changed (technical identifiers):
- Package names (@planarchy/*)
- Import paths
- Database names
- Docker container names
- localStorage keys
- Domain URLs
- CLAUDE.md

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

apps/web/src/app/layout.tsx

@@ -19,23 +19,23 @@ const displayFont = Manrope({
 
 export const metadata: Metadata = {
   metadataBase: new URL("https://planarchy.hartmut-noerenberg.com"),
-  title: "plANARCHY — Resource Planning",
+  title: "CapaKraken — Resource & Capacity Planning",
   description: "Interactive resource planning and project staffing tool",
   manifest: "/manifest.json",
   appleWebApp: {
     capable: true,
     statusBarStyle: "default",
-    title: "Planarchy",
+    title: "CapaKraken",
   },
   openGraph: {
-    title: "plANARCHY — Resource Planning",
+    title: "CapaKraken — Resource & Capacity Planning",
     description: "Estimates, staffing, chargeability, and timelines in one workspace.",
-    images: [{ url: "/og-image.png", width: 1024, height: 1024, alt: "plANARCHY Logo" }],
+    images: [{ url: "/og-image.png", width: 1024, height: 1024, alt: "CapaKraken Logo" }],
     type: "website",
   },
   twitter: {
     card: "summary_large_image",
-    title: "plANARCHY — Resource Planning",
+    title: "CapaKraken — Resource & Capacity Planning",
     description: "Estimates, staffing, chargeability, and timelines in one workspace.",
     images: ["/og-image.png"],
   },