Person page: server-side search; stop loading the whole tree

The person page fetched the entire tree on every open — all persons (to build a
name map + power the relative pickers) and all events (to find partnership
events). On a 2k-person tree that's a ~230KB person list + ~600KB event list per
view. Now it loads only what the page shows:

Frontend:
- The relationship & spouse pickers use the backend's fuzzy pg_trgm search
  (debounced, typo-tolerant) instead of substring-filtering a preloaded array —
  better search, and no need to preload every person. PersonCombobox gained an
  `onSearch` server mode (client `people` mode still works).
- The page drops the all-persons and all-events fetches; it resolves just this
  person's relatives' names via GET /persons?ids=..., and reads partnership
  events from the per-person events endpoint.

Backend:
- GET /trees/{id}/persons?ids=a,b,c — batch by id (privacy-filtered, names
  batched), for relative-name display.
- list_events_for_person (member path) now also returns the person's partnership
  events, so the page needn't scan every event in the tree.

Adversarial review (frontend logic + backend/privacy) found no issues. Suite 105
passing.

Signed-off-by: Justin Paul <justin@jpaul.me>

frontend/app/trees/[id]/persons/[personId]/page.tsx

@@ -135,7 +135,6 @@ export default function PersonDetailPage() {
   const [evType, setEvType] = useState("birth");
   const [evTypeOther, setEvTypeOther] = useState("");
   const [evSpouse, setEvSpouse] = useState(""); // partner for a partnership event
-  const [allEvents, setAllEvents] = useState<Event[]>([]); // tree-wide, for partnership events
   const [dateQual, setDateQual] = useState("exact");
   const [dateDay, setDateDay] = useState("");
   const [dateMonth, setDateMonth] = useState("");
@@ -189,8 +188,9 @@ export default function PersonDetailPage() {
       return;
     }
     setPerson(p.data ?? null);
-    const [all, nm, mine, tr, ev, rl, src, cit, evAll, med] = await Promise.all([
-      api.GET("/api/v1/trees/{tree_id}/persons", { params: { path: { tree_id: treeId } } }),
+    // Person-scoped fetches only — the page no longer pulls the whole tree.
+    // /persons/{id}/events now includes this person's partnership events too.
+    const [nm, mine, tr, ev, rl, src, cit, med] = await Promise.all([
       api.GET("/api/v1/trees/{tree_id}/persons/{person_id}/names", {
         params: { path: { tree_id: treeId, person_id: personId } },
       }),
@@ -204,22 +204,49 @@ export default function PersonDetailPage() {
       }),
       api.GET("/api/v1/trees/{tree_id}/sources", { params: { path: { tree_id: treeId } } }),
       api.GET("/api/v1/trees/{tree_id}/citations", { params: { path: { tree_id: treeId } } }),
-      api.GET("/api/v1/trees/{tree_id}/events", { params: { path: { tree_id: treeId } } }),
       api.GET("/api/v1/trees/{tree_id}/media", { params: { path: { tree_id: treeId } } }),
     ]);
-    setPeople(all.data ?? []);
     setNames(nm.data ?? []);
     setMe(mine.data ?? null);
     setTree(tr.data ?? null);
     setEvents(ev.data ?? []);
-    setAllEvents(evAll.data ?? []);
     setMedia(med.data ?? []);
     setRels(rl.data ?? []);
     setSources(src.data ?? []);
     setCitations(cit.data ?? []);
+    // Resolve the names of just this person's relatives (for display), by id —
+    // not the whole tree. The relationship/spouse pickers search on demand.
+    const relList = rl.data ?? [];
+    const relatedIds = Array.from(
+      new Set(
+        relList
+          .flatMap((r) => [r.person_from_id, r.person_to_id])
+          .filter((id): id is string => !!id && id !== personId),
+      ),
+    );
+    if (relatedIds.length) {
+      const rel = await api.GET("/api/v1/trees/{tree_id}/persons", {
+        params: { path: { tree_id: treeId }, query: { ids: relatedIds.join(",") } },
+      });
+      setPeople(rel.data ?? []);
+    } else {
+      setPeople([]);
+    }
     setReady(true);
   }, [router, treeId, personId]);
 
+  // Server-side fuzzy search for the relative/spouse pickers — avoids loading
+  // every person just to search.
+  const searchPeople = useCallback(
+    async (query: string) => {
+      const r = await api.GET("/api/v1/trees/{tree_id}/persons", {
+        params: { path: { tree_id: treeId }, query: { q: query } },
+      });
+      return (r.data ?? []).filter((pp) => pp.id !== personId);
+    },
+    [treeId, personId],
+  );
+
   useEffect(() => {
     load();
   }, [load]);
@@ -233,7 +260,6 @@ export default function PersonDetailPage() {
     return (id: string) => m.get(id) ?? "source";
   }, [sources]);
 
-  const others = people.filter((p) => p.id !== personId);
   const parents = rels.filter((r) => r.type === "parent_child" && r.person_to_id === personId);
   const children = rels.filter((r) => r.type === "parent_child" && r.person_from_id === personId);
   const partners = rels.filter((r) => r.type === "partnership");
@@ -241,22 +267,18 @@ export default function PersonDetailPage() {
   const eventCites = (id: string) => citations.filter((c) => c.event_id === id);
   const personCites = citations.filter((c) => c.person_id === personId);
 
-  // Partnership events live on the relationship and show on both partners.
+  // Partnership events live on the relationship and show on both partners; the
+  // /persons/{id}/events endpoint now returns them alongside personal events.
   const myPartnerRels = rels.filter(
     (r) => r.type === "partnership" && (r.person_from_id === personId || r.person_to_id === personId),
   );
-  const myPartnerRelIds = new Set(myPartnerRels.map((r) => r.id));
-  const relEvents = allEvents.filter(
-    (e) => e.relationship_id && myPartnerRelIds.has(e.relationship_id),
-  );
   const spouseOfRelEvent = (relId: string | null | undefined) => {
     const r = myPartnerRels.find((x) => x.id === relId);
     if (!r) return null;
     return r.person_from_id === personId ? r.person_to_id : r.person_from_id;
   };
   const isPartnershipType = (t: string) => PARTNERSHIP_EVENTS.includes(t);
-  // Personal events + this person's partnership events, shown together.
-  const shownEvents = [...events, ...relEvents];
+  const shownEvents = events;
 
   async function addEvent(e: React.FormEvent) {
     e.preventDefault();
@@ -1090,7 +1112,7 @@ export default function PersonDetailPage() {
               <label className="flex flex-col gap-1">
                 <span className="text-xs text-[var(--muted)]">Spouse / partner</span>
                 <PersonCombobox
-                  people={others}
+                  onSearch={searchPeople}
                   value={evSpouse}
                   onChange={setEvSpouse}
                   placeholder="Search for a spouse…"
@@ -1158,36 +1180,32 @@ export default function PersonDetailPage() {
             </div>
           )}
 
-          {others.length === 0 ? (
-            <p className="text-sm text-[var(--muted)]">Add more people to the tree to link them.</p>
-          ) : (
-            <form onSubmit={addRel} className="flex flex-wrap items-center gap-2">
-              <span className="text-sm text-[var(--muted)]">Add</span>
-              <select className={fieldCls} value={relKind} onChange={(e) => setRelKind(e.target.value as typeof relKind)}>
-                <option value="parent">parent</option>
-                <option value="child">child</option>
-                <option value="partner">partner</option>
-                <option value="sibling">sibling</option>
+          <form onSubmit={addRel} className="flex flex-wrap items-center gap-2">
+            <span className="text-sm text-[var(--muted)]">Add</span>
+            <select className={fieldCls} value={relKind} onChange={(e) => setRelKind(e.target.value as typeof relKind)}>
+              <option value="parent">parent</option>
+              <option value="child">child</option>
+              <option value="partner">partner</option>
+              <option value="sibling">sibling</option>
+            </select>
+            <PersonCombobox
+              onSearch={searchPeople}
+              value={relOther}
+              onChange={setRelOther}
+              onCreate={createRelativeAndGo}
+              placeholder="Search, or type a new name…"
+            />
+            {(relKind === "parent" || relKind === "child") && (
+              <select className={fieldCls} value={relQual} onChange={(e) => setRelQual(e.target.value as Qualifier)}>
+                {QUALIFIERS.map((q) => (
+                  <option key={q} value={q}>
+                    {q}
+                  </option>
+                ))}
               </select>
-              <PersonCombobox
-                people={others}
-                value={relOther}
-                onChange={setRelOther}
-                onCreate={createRelativeAndGo}
-                placeholder="Search, or type a new name…"
-              />
-              {(relKind === "parent" || relKind === "child") && (
-                <select className={fieldCls} value={relQual} onChange={(e) => setRelQual(e.target.value as Qualifier)}>
-                  {QUALIFIERS.map((q) => (
-                    <option key={q} value={q}>
-                      {q}
-                    </option>
-                  ))}
-                </select>
-              )}
-              <Button type="submit">Link</Button>
-            </form>
-          )}
+            )}
+            <Button type="submit">Link</Button>
+          </form>
           {relErr && <p className="text-sm text-red-600">{relErr}</p>}
         </CardContent>
       </Card>

frontend/components/person-combobox.tsx

@@ -1,26 +1,30 @@
 "use client";
 
-import { useEffect, useMemo, useRef, useState } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 
 import type { components } from "@/lib/api/schema";
 
 type Person = components["schemas"]["PersonRead"];
 
 /**
- * A type-to-filter person picker. Shows a text input; as you type, a dropdown
- * of matching people appears. Selecting one sets `value` (a person id) and
- * fills the input with their name. Replaces a plain <select> when the list is
- * long enough that scanning it by hand is painful.
+ * A type-to-pick person picker. Two modes:
+ *   - client  (`people`):   filter a preloaded list in the browser.
+ *   - server  (`onSearch`): query the backend (debounced) as you type — the
+ *                           preferred mode for large trees, so the page doesn't
+ *                           have to preload every person just to search.
+ * Selecting one sets `value` (a person id) and fills the input with their name.
  */
 export function PersonCombobox({
   people,
+  onSearch,
   value,
   onChange,
   onCreate,
   placeholder = "Search for a person…",
   className,
 }: {
-  people: Person[];
+  people?: Person[];
+  onSearch?: (q: string) => Promise<Person[]>;
   value: string;
   onChange: (id: string) => void;
   /** When set, the dropdown offers a "Create '<typed name>'" action. */
@@ -30,21 +34,27 @@ export function PersonCombobox({
 }) {
   const [query, setQuery] = useState("");
   const [open, setOpen] = useState(false);
+  const [results, setResults] = useState<Person[]>([]);
+  const [loading, setLoading] = useState(false);
   const wrapRef = useRef<HTMLDivElement>(null);
+  // Names we've seen (from the list or search results), so a selected value
+  // keeps displaying its name even in server mode.
+  const known = useRef<Map<string, string>>(new Map());
 
-  const nameOf = useMemo(
-    () => new Map(people.map((p) => [p.id, p.primary_name ?? "Unnamed"])),
-    [people],
-  );
+  const remember = useCallback((ps: Person[] | undefined) => {
+    for (const p of ps ?? []) known.current.set(p.id, p.primary_name ?? "Unnamed");
+  }, []);
+  useEffect(() => {
+    remember(people);
+  }, [people, remember]);
+
+  const nameOf = useCallback((id: string) => known.current.get(id) ?? "", []);
 
   // Keep the input text in sync when the selection changes externally
   // (e.g. cleared to "" after a successful add).
   useEffect(() => {
-    if (!value) {
-      setQuery("");
-    } else if (!open) {
-      setQuery(nameOf.get(value) ?? "");
-    }
+    if (!value) setQuery("");
+    else if (!open) setQuery(nameOf(value));
   }, [value, open, nameOf]);
 
   // Close on outside click.
@@ -56,17 +66,48 @@ export function PersonCombobox({
     return () => document.removeEventListener("mousedown", onDoc);
   }, []);
 
+  // Server search, debounced. Stale responses are dropped via `cancelled`.
+  useEffect(() => {
+    if (!onSearch) return;
+    const q = query.trim();
+    if (!q) {
+      setResults([]);
+      setLoading(false);
+      return;
+    }
+    setLoading(true);
+    let cancelled = false;
+    const t = setTimeout(async () => {
+      try {
+        const r = await onSearch(q);
+        if (cancelled) return;
+        remember(r);
+        setResults(r);
+      } finally {
+        if (!cancelled) setLoading(false);
+      }
+    }, 160);
+    return () => {
+      cancelled = true;
+      clearTimeout(t);
+    };
+  }, [query, onSearch, remember]);
+
   const matches = useMemo(() => {
+    if (onSearch) return results.slice(0, 10);
     const q = query.trim().toLowerCase();
     const pool = q
-      ? people.filter((p) => (p.primary_name ?? "").toLowerCase().includes(q))
-      : people;
+      ? (people ?? []).filter((p) => (p.primary_name ?? "").toLowerCase().includes(q))
+      : (people ?? []);
     return pool.slice(0, 10);
-  }, [query, people]);
+  }, [query, results, people, onSearch]);
 
   const base =
     "h-9 w-56 rounded-md border border-[var(--border)] bg-[var(--surface)] px-2 text-sm placeholder:text-[var(--muted)] focus-visible:border-bronze focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-bronze/40";
 
+  const showDropdown =
+    open && (matches.length > 0 || loading || (onCreate && query.trim()));
+
   return (
     <div ref={wrapRef} className="relative">
       <input
@@ -80,8 +121,11 @@ export function PersonCombobox({
           if (value) onChange(""); // typing invalidates the prior pick
         }}
       />
-      {open && (matches.length > 0 || (onCreate && query.trim())) && (
+      {showDropdown && (
         <ul className="absolute z-30 mt-1 max-h-64 w-72 overflow-auto rounded-lg border border-[var(--border)] bg-[var(--surface)] shadow-lg">
+          {loading && matches.length === 0 && (
+            <li className="px-3 py-2 text-sm text-[var(--muted)]">Searching…</li>
+          )}
           {matches.map((p) => (
             <li key={p.id}>
               <button

frontend/lib/api/schema.d.ts

@@ -2719,6 +2719,7 @@ export interface operations {
             query?: {
                 deleted?: boolean;
                 q?: string | null;
+                ids?: string | null;
             };
             header?: never;
             path: {

frontend/openapi.json

@@ -851,6 +851,22 @@
               ],
               "title": "Q"
             }
+          },
+          {
+            "name": "ids",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ],
+              "title": "Ids"
+            }
           }
         ],
         "responses": {