feat(default): reorganize system settings pricing UI

Refine the default system settings structure and model pricing editor so pricing configuration is easier to scan and edit.

web/default/src/routes/_authenticated/system-settings/operations/$section.tsx

@@ -0,0 +1,21 @@
+import { createFileRoute, redirect } from '@tanstack/react-router'
+import { OperationsSettings } from '@/features/system-settings/operations'
+import {
+  OPERATIONS_DEFAULT_SECTION,
+  OPERATIONS_SECTION_IDS,
+} from '@/features/system-settings/operations/section-registry.tsx'
+
+export const Route = createFileRoute(
+  '/_authenticated/system-settings/operations/$section'
+)({
+  beforeLoad: ({ params }) => {
+    const validSections = OPERATIONS_SECTION_IDS as unknown as string[]
+    if (!validSections.includes(params.section)) {
+      throw redirect({
+        to: '/system-settings/operations/$section',
+        params: { section: OPERATIONS_DEFAULT_SECTION },
+      })
+    }
+  },
+  component: OperationsSettings,
+})

web/default/src/routes/_authenticated/system-settings/operations/index.tsx

@@ -0,0 +1,13 @@
+import { createFileRoute, redirect } from '@tanstack/react-router'
+import { OPERATIONS_DEFAULT_SECTION } from '@/features/system-settings/operations/section-registry.tsx'
+
+export const Route = createFileRoute(
+  '/_authenticated/system-settings/operations/'
+)({
+  beforeLoad: () => {
+    throw redirect({
+      to: '/system-settings/operations/$section',
+      params: { section: OPERATIONS_DEFAULT_SECTION },
+    })
+  },
+})