fix(settings): make delegated module rows read-only managed deep-links

The Module hub rendered live switches for the delegated keys cycle and coach,
but the gate resolves those from their own sources (cycle from CycleProfile,
coach from the operator flag + disableCoach), so a toggle wrote an inert entry
to modulePreferencesJson, snapped back, and still fired a success toast. Render
delegated modules as read-only rows that deep-link to their real control, strip
delegated keys from the modules PATCH schema so no inert value is stored, drop
the duplicate cycle control, and surface an operator-disabled state with the
previously orphaned hint string.

src/lib/modules/registry.ts

@@ -65,6 +65,13 @@ export interface ModuleDefinition {
    * there is exactly one source of truth. See `ModuleDelegation`.
    */
   delegatesTo?: ModuleDelegation;
+  /**
+   * For delegated modules only: where the real on/off control lives, so the
+   * Modules hub can render a read-only "managed in X" row that deep-links to
+   * the canonical control instead of a dead toggle. `href` is the in-app
+   * link; `labelKey` names the destination ("Account", "Coach settings").
+   */
+  managedAt?: { href: string; labelKey: string };
 }
 
 /**
@@ -138,6 +145,11 @@ export const MODULE_REGISTRY: Readonly<Record<ModuleKey, ModuleDefinition>> =
       descriptionKey: "modules.cycle.description",
       category: "tracking",
       delegatesTo: "cycle",
+      // The real on/off lives in the Account section's cycle-tracking card.
+      managedAt: {
+        href: "/settings/account#cycle-tracking",
+        labelKey: "settings.sections.account.title",
+      },
     },
     mood: {
       key: "mood",
@@ -187,6 +199,11 @@ export const MODULE_REGISTRY: Readonly<Record<ModuleKey, ModuleDefinition>> =
       descriptionKey: "modules.coach.description",
       category: "intelligence",
       delegatesTo: "coach",
+      // The real on/off lives in the dedicated Coach settings section.
+      managedAt: {
+        href: "/settings/coach",
+        labelKey: "settings.sections.coach.title",
+      },
     },
     insights: {
       key: "insights",