feat: add organization settings UI

frontend/src/locales/en.json

@@ -39,7 +39,10 @@
     "saving": "Saving..."
   },
   "workspaceSelector": {
-    "createAction": "Add workspace"
+    "createAction": "Add workspace",
+    "organizationLabel": "Organization",
+    "organizationSettings": "Organization settings",
+    "noOrganization": "No organization"
   },
   "workspaceCreate": {
     "eyebrow": "Workspace",
@@ -54,6 +57,7 @@
     "fields": {
       "name": "Workspace name",
       "namePlaceholder": "Northwind Studio",
+      "organization": "Organization",
       "slug": "Workspace slug",
       "slugPlaceholder": "northwind-studio",
       "timeZone": "Time zone"
@@ -63,6 +67,66 @@
       "createFailed": "The workspace could not be created."
     }
   },
+  "organizationSettings": {
+    "eyebrow": "Organization",
+    "title": "Organization settings",
+    "description": "Manage the SaaS account boundary for members, billing access, connections, and owned workspaces.",
+    "loading": "Loading organization settings...",
+    "slugLabel": "Account slug",
+    "fields": {
+      "name": "Name",
+      "slug": "Slug",
+      "createdAt": "Created"
+    },
+    "sections": {
+      "profile": {
+        "title": "Profile",
+        "description": "The account identity used across organization-owned workspaces."
+      },
+      "members": {
+        "title": "Members",
+        "description": "Organization-level users and their inherited account permissions.",
+        "empty": "No organization members found."
+      },
+      "billing": {
+        "title": "Billing",
+        "description": "Subscription and billing access for this organization.",
+        "placeholderTitle": "Billing provider is not connected yet",
+        "placeholderText": "Plan, payment, and invoice management will live here after billing integration is added."
+      },
+      "connections": {
+        "title": "Connections",
+        "description": "Organization-level connectors and data mappings.",
+        "placeholderTitle": "No organization connections configured",
+        "placeholderText": "Connector authorization flows are intentionally out of scope for this UI shell."
+      },
+      "workspaces": {
+        "title": "Workspaces",
+        "description": "Brand and client workspaces owned by this organization.",
+        "empty": "No workspaces belong to this organization yet."
+      }
+    },
+    "roles": {
+      "Owner": "Owner",
+      "Admin": "Admin",
+      "BillingManager": "Billing manager",
+      "ConnectorManager": "Connector manager",
+      "Member": "Member"
+    },
+    "permissions": {
+      "title": "Your permissions",
+      "description": "Current organization permissions returned by the API.",
+      "items": {
+        "ManageOrganizationSettings": "Manage settings",
+        "ManageOrganizationMembers": "Manage members",
+        "CreateWorkspaces": "Create workspaces",
+        "ManageWorkspaces": "Manage workspaces",
+        "ManageBilling": "Manage billing",
+        "ManageConnectors": "Manage connectors",
+        "AccessOwnedWorkspaces": "Access owned workspaces"
+      }
+    }
+  },
   "nav": {
     "brandCaption": "Approval workflow",
     "workspace": "Workspace",