feat(500): Settings shows the shipped reply shapes, what adjusts each, and how often each arrives

Settings > General > Reply shapes. One menu row per shape (core, completion,
asks, plan): its title and when it arrives, how many of the operator's
preferences adjust it, and its deliveries over 30 days (in full / as a
reminder, "—" when the counts cannot be read). A verdict line leads. Opening a
row shows the shipped text, read-only because it is product, and the
preferences mounted on its moment; each opens in the rule editor, and "Adjust
this" opens a new preference already mounted on the shape's moment with a
starting trigger.

The rule editor takes an optional preset (kind, moments, trigger) and, opened
outside the Rules view, asks where a new record lives instead of dropping it.
GET /api/retrieval/reply-shapes now returns reply_shapes.overview: the
catalog plus mounted preferences (the same lookup that delivers them) and
counts from the reply_shape delivery rows. #5497 (step 5 of milestone 500).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/api/rulebooks.ts

@@ -54,6 +54,15 @@ export interface RulebookTopic {
  */
 export type RuleKind = "rule" | "preference";
 
+/** A new record opened from somewhere that already knows what it is for —
+ *  "Adjust this" on a reply shape opens a preference mounted on that shape's
+ *  moment (milestone 500 step 5). The editor applies it once, when creating. */
+export interface RulePreset {
+  kind?: RuleKind;
+  moments?: string[];
+  whenToApply?: string;
+}
+
 export interface Rule {
   id: number;
   topic_id: number | null;