feat: Added updateCreatorProfile() API client and inline bio/social-lin…

- "frontend/src/api/public-client.ts"
- "frontend/src/pages/CreatorDetail.tsx"
- "frontend/src/App.css"

GSD-Task: S04/T01

frontend/src/App.css

@@ -2721,6 +2721,148 @@ a.app-footer__repo:hover {
   height: 1.25rem;
 }
 
+/* Creator Hero — Edit Mode */
+.creator-hero__name-row {
+  display: flex;
+  align-items: baseline;
+  gap: 0.75rem;
+}
+
+.creator-hero__edit-btn {
+  background: none;
+  border: 1px solid var(--color-border);
+  color: var(--color-text-muted);
+  font-size: 0.75rem;
+  padding: 0.25rem 0.5rem;
+  border-radius: 4px;
+  cursor: pointer;
+  transition: color 0.15s ease, border-color 0.15s ease;
+  white-space: nowrap;
+}
+
+.creator-hero__edit-btn:hover {
+  color: var(--color-accent);
+  border-color: var(--color-accent);
+}
+
+.creator-edit-form {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+  max-width: 36rem;
+}
+
+.creator-edit-form__label {
+  font-size: 0.75rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: var(--color-text-muted);
+  margin-bottom: -0.375rem;
+}
+
+.creator-edit-form__bio {
+  width: 100%;
+  min-height: 5rem;
+  padding: 0.5rem 0.75rem;
+  border: 1px solid var(--color-border);
+  border-radius: 6px;
+  background: var(--color-surface);
+  color: var(--color-text);
+  font-family: inherit;
+  font-size: 0.9375rem;
+  line-height: 1.6;
+  resize: vertical;
+}
+
+.creator-edit-form__bio:focus {
+  outline: none;
+  border-color: var(--color-accent);
+  box-shadow: 0 0 0 2px rgba(var(--color-accent-rgb, 99, 102, 241), 0.15);
+}
+
+.creator-edit-form__links {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+
+.creator-edit-form__link-row {
+  display: flex;
+  gap: 0.5rem;
+  align-items: center;
+}
+
+.creator-edit-form__platform-select {
+  flex: 0 0 8rem;
+  padding: 0.375rem 0.5rem;
+  border: 1px solid var(--color-border);
+  border-radius: 4px;
+  background: var(--color-surface);
+  color: var(--color-text);
+  font-size: 0.875rem;
+}
+
+.creator-edit-form__url-input {
+  flex: 1;
+  min-width: 0;
+  padding: 0.375rem 0.5rem;
+  border: 1px solid var(--color-border);
+  border-radius: 4px;
+  background: var(--color-surface);
+  color: var(--color-text);
+  font-size: 0.875rem;
+}
+
+.creator-edit-form__url-input:focus,
+.creator-edit-form__platform-select:focus {
+  outline: none;
+  border-color: var(--color-accent);
+}
+
+.creator-edit-form__remove-btn {
+  background: none;
+  border: none;
+  color: var(--color-text-muted);
+  cursor: pointer;
+  font-size: 1rem;
+  padding: 0.25rem;
+  line-height: 1;
+  border-radius: 4px;
+}
+
+.creator-edit-form__remove-btn:hover {
+  color: var(--color-danger, #ef4444);
+}
+
+.creator-edit-form__add-btn {
+  align-self: flex-start;
+  background: none;
+  border: 1px dashed var(--color-border);
+  color: var(--color-text-muted);
+  font-size: 0.8125rem;
+  padding: 0.375rem 0.75rem;
+  border-radius: 4px;
+  cursor: pointer;
+}
+
+.creator-edit-form__add-btn:hover {
+  border-color: var(--color-accent);
+  color: var(--color-accent);
+}
+
+.creator-edit-form__error {
+  color: var(--color-danger, #ef4444);
+  font-size: 0.8125rem;
+  padding: 0.375rem 0;
+}
+
+.creator-edit-form__actions {
+  display: flex;
+  gap: 0.5rem;
+  margin-top: 0.25rem;
+}
+
 .creator-detail__stats-bar {
   display: flex;
   align-items: center;

frontend/src/api/public-client.ts

@@ -811,6 +811,31 @@ export interface AdminTechniquePageListResponse {
   limit: number;
 }
 
+// ── Admin: Creator Profile ──────────────────────────────────────────────────
+
+export interface UpdateCreatorProfilePayload {
+  bio?: string | null;
+  social_links?: Record<string, string> | null;
+  featured?: boolean;
+  avatar_url?: string | null;
+}
+
+export interface UpdateCreatorProfileResponse {
+  status: string;
+  creator: string;
+  fields: string[];
+}
+
+export async function updateCreatorProfile(
+  creatorId: string,
+  payload: UpdateCreatorProfilePayload,
+): Promise<UpdateCreatorProfileResponse> {
+  return request<UpdateCreatorProfileResponse>(
+    `${BASE}/admin/pipeline/creators/${creatorId}`,
+    { method: "PUT", body: JSON.stringify(payload) },
+  );
+}
+
 export async function fetchAdminTechniquePages(
   params: {
     multi_source_only?: boolean;

frontend/src/pages/CreatorDetail.tsx

@@ -9,6 +9,7 @@ import { useEffect, useState } from "react";
 import { Link, useParams } from "react-router-dom";
 import {
   fetchCreator,
+  updateCreatorProfile,
   type CreatorDetailResponse,
 } from "../api/public-client";
 import CreatorAvatar from "../components/CreatorAvatar";
@@ -25,6 +26,18 @@ const CREATOR_SORT_OPTIONS = [
   { value: "alpha", label: "A–Z" },
 ];
 
+const PLATFORM_OPTIONS = [
+  "Instagram",
+  "YouTube",
+  "Bandcamp",
+  "SoundCloud",
+  "Twitter",
+  "Spotify",
+  "Facebook",
+  "Twitch",
+  "Website",
+];
+
 export default function CreatorDetail() {
   const { slug } = useParams<{ slug: string }>();
   const [creator, setCreator] = useState<CreatorDetailResponse | null>(null);
@@ -33,6 +46,13 @@ export default function CreatorDetail() {
   const [error, setError] = useState<string | null>(null);
   const [sort, setSort] = useSortPreference("newest");
 
+  // Edit mode state
+  const [editMode, setEditMode] = useState(false);
+  const [editBio, setEditBio] = useState("");
+  const [editLinks, setEditLinks] = useState<Array<{ platform: string; url: string }>>([]);
+  const [saving, setSaving] = useState(false);
+  const [saveError, setSaveError] = useState<string | null>(null);
+
   useDocumentTitle(creator ? `${creator.name} — Chrysopedia` : "Chrysopedia");
 
   useEffect(() => {
@@ -69,6 +89,65 @@ export default function CreatorDetail() {
     };
   }, [slug]);
 
+  function enterEditMode() {
+    if (!creator) return;
+    setEditBio(creator.bio ?? "");
+    setEditLinks(
+      creator.social_links && Object.keys(creator.social_links).length > 0
+        ? Object.entries(creator.social_links).map(([platform, url]) => ({ platform, url }))
+        : [],
+    );
+    setSaveError(null);
+    setEditMode(true);
+  }
+
+  function handleCancel() {
+    setEditMode(false);
+    setSaveError(null);
+  }
+
+  async function handleSave() {
+    if (!creator) return;
+    setSaving(true);
+    setSaveError(null);
+
+    const filteredLinks = editLinks.filter((l) => l.platform && l.url);
+    const socialLinks: Record<string, string> | null =
+      filteredLinks.length > 0
+        ? Object.fromEntries(filteredLinks.map((l) => [l.platform.toLowerCase(), l.url]))
+        : null;
+
+    try {
+      await updateCreatorProfile(creator.id, {
+        bio: editBio || null,
+        social_links: socialLinks,
+      });
+      // Optimistic local update
+      setCreator({
+        ...creator,
+        bio: editBio || null,
+        social_links: socialLinks,
+      });
+      setEditMode(false);
+    } catch (err) {
+      setSaveError(err instanceof Error ? err.message : "Failed to save");
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  function addLinkRow() {
+    setEditLinks([...editLinks, { platform: PLATFORM_OPTIONS[0] ?? "Instagram", url: "" }]);
+  }
+
+  function removeLinkRow(index: number) {
+    setEditLinks(editLinks.filter((_, i) => i !== index));
+  }
+
+  function updateLinkRow(index: number, field: "platform" | "url", value: string) {
+    setEditLinks(editLinks.map((row, i) => (i === index ? { ...row, [field]: value } : row)));
+  }
+
   if (loading) {
     return <div className="loading">Loading creator…</div>;
   }
@@ -120,7 +199,87 @@ export default function CreatorDetail() {
           size={96}
         />
         <div className="creator-hero__info">
+          <div className="creator-hero__name-row">
             <h1 className="creator-hero__name">{creator.name}</h1>
+            {!editMode && (
+              <button
+                className="creator-hero__edit-btn"
+                onClick={enterEditMode}
+                title="Edit profile"
+              >
+                ✎ Edit
+              </button>
+            )}
+          </div>
+
+          {editMode ? (
+            <div className="creator-edit-form">
+              <label className="creator-edit-form__label">Bio</label>
+              <textarea
+                className="creator-edit-form__bio"
+                value={editBio}
+                onChange={(e) => setEditBio(e.target.value)}
+                rows={4}
+                placeholder="Creator bio…"
+              />
+
+              <label className="creator-edit-form__label">Social Links</label>
+              <div className="creator-edit-form__links">
+                {editLinks.map((link, i) => (
+                  <div key={i} className="creator-edit-form__link-row">
+                    <select
+                      value={link.platform}
+                      onChange={(e) => updateLinkRow(i, "platform", e.target.value)}
+                      className="creator-edit-form__platform-select"
+                    >
+                      {PLATFORM_OPTIONS.map((p) => (
+                        <option key={p} value={p}>{p}</option>
+                      ))}
+                    </select>
+                    <input
+                      type="url"
+                      className="creator-edit-form__url-input"
+                      value={link.url}
+                      onChange={(e) => updateLinkRow(i, "url", e.target.value)}
+                      placeholder="https://…"
+                    />
+                    <button
+                      className="creator-edit-form__remove-btn"
+                      onClick={() => removeLinkRow(i)}
+                      title="Remove link"
+                    >
+                      ✕
+                    </button>
+                  </div>
+                ))}
+                <button className="creator-edit-form__add-btn" onClick={addLinkRow}>
+                  + Add Link
+                </button>
+              </div>
+
+              {saveError && (
+                <div className="creator-edit-form__error">{saveError}</div>
+              )}
+
+              <div className="creator-edit-form__actions">
+                <button
+                  className="btn btn--primary"
+                  onClick={handleSave}
+                  disabled={saving}
+                >
+                  {saving ? "Saving…" : "Save"}
+                </button>
+                <button
+                  className="btn btn--secondary"
+                  onClick={handleCancel}
+                  disabled={saving}
+                >
+                  Cancel
+                </button>
+              </div>
+            </div>
+          ) : (
+            <>
               {creator.bio && (
                 <p className="creator-hero__bio">{creator.bio}</p>
               )}
@@ -134,6 +293,9 @@ export default function CreatorDetail() {
                   ))}
                 </div>
               )}
+            </>
+          )}
+
           {creator.genres && creator.genres.length > 0 && (
             <div className="creator-hero__genres">
               {creator.genres.map((g) => (