Resolve namespaced Lucide icons in the admin lookup and picker

The API now returns definition icons as lucide:<name>, but the admin
looked up and compared bare names only, so every icon rendered as the
generic fallback and nothing was selected in the edit picker (NQ-241-1).

Add normalizeDefinitionIconName as the one rule for both surfaces:
lucide:<name> and a legacy bare <name> give <name>; fa:, emoji: and
unknown namespaces give null (the fallback tile). Tapping a Lucide
choice now stores the canonical lucide:<name>; No icon still clears.

Task 707994b7.

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

admin/src/definitions/DefinitionsTab.test.tsx

@@ -1,7 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { act, cleanup, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
 import DefinitionsTab from "./DefinitionsTab";
-import { DEFINITION_ICONS, DefinitionIcon } from "./definitionIcons";
+import { DEFINITION_ICONS, DefinitionIcon, normalizeDefinitionIconName } from "./definitionIcons";
 import type { AdminChild, DefinitionRule, QuestDefinition } from "../api/definitions";
 import { storeTokens } from "../auth/oidc";
 
@@ -1052,7 +1052,7 @@ describe("DefinitionsTab icon picker", () => {
 
     expect(api.writes()).toHaveLength(1);
     expect(api.writes()[0].method).toBe("POST");
-    expect((api.writes()[0].body as { icon: string }).icon).toBe("bed");
+    expect((api.writes()[0].body as { icon: string }).icon).toBe("lucide:bed");
     expect(rowIcon(await screen.findByTestId("definition-99"))).toBe("bed");
   });
 
@@ -1073,7 +1073,7 @@ describe("DefinitionsTab icon picker", () => {
     const { method, path, body } = api.writes()[0];
     expect(method).toBe("PATCH");
     expect(path).toBe("/api/v1/admin/quest-definitions/11");
-    expect((body as { icon: string }).icon).toBe("trash-2");
+    expect((body as { icon: string }).icon).toBe("lucide:trash-2");
     // Inactive "Old" stays assigned: the unchanged selection is still omitted.
     expect(body).not.toHaveProperty("assignee_child_ids");
     await waitFor(() => expect(rowIcon(screen.getByTestId("definition-11"))).toBe("trash-2"));
@@ -1119,6 +1119,94 @@ describe("DefinitionsTab icon picker", () => {
   });
 });
 
+describe("DefinitionsTab namespaced icons", () => {
+  beforeEach(() => {
+    sessionStorage.clear();
+    storeTokens({ access_token: "at-123", expires_in: 600 });
+  });
+
+  afterEach(() => {
+    cleanup();
+    vi.unstubAllGlobals();
+    vi.useRealTimers();
+  });
+
+  function rowIcon(row: HTMLElement): string | null {
+    const svg = row.querySelector(".defs-row-glyph svg");
+    expect(svg).not.toBeNull();
+    return svg!.getAttribute("data-icon");
+  }
+
+  function iconRadio(s: HTMLElement, label: string): HTMLElement {
+    return within(within(s).getByRole("radiogroup", { name: "Icon" })).getByRole("radio", {
+      name: label,
+    });
+  }
+
+  it("normalizes lucide-namespaced and legacy bare values to one Lucide name", () => {
+    expect(normalizeDefinitionIconName("lucide:dog")).toBe("dog");
+    expect(normalizeDefinitionIconName("dog")).toBe("dog");
+    expect(normalizeDefinitionIconName("fa:dog")).toBeNull();
+    expect(normalizeDefinitionIconName("emoji:🐶")).toBeNull();
+    expect(normalizeDefinitionIconName("mystery:dog")).toBeNull();
+    expect(normalizeDefinitionIconName(null)).toBeNull();
+  });
+
+  for (const icon of ["lucide:dog", "dog"]) {
+    it(`renders and selects the Dog glyph for ${icon}`, async () => {
+      await renderReady([{ ...BRUSH, id: 30, icon }]);
+      const row = screen.getByTestId("definition-30");
+      expect(rowIcon(row)).toBe("dog");
+
+      fireEvent.click(row);
+      const s = sheet();
+      expect(iconRadio(s, "Dog").getAttribute("aria-checked")).toBe("true");
+      expect(iconRadio(s, "Dog").className).toContain("defs-icon--on");
+      expect(iconRadio(s, "No icon").getAttribute("aria-checked")).toBe("false");
+    });
+  }
+
+  for (const icon of ["fa:dog", "emoji:🐶", "mystery:dog"]) {
+    it(`renders the fallback tile and selects nothing for ${icon}`, async () => {
+      await renderReady([{ ...BRUSH, id: 31, icon }]);
+      const row = screen.getByTestId("definition-31");
+      expect(rowIcon(row)).toBeNull();
+
+      fireEvent.click(row);
+      const s = sheet();
+      const group = within(s).getByRole("radiogroup", { name: "Icon" });
+      for (const radio of within(group).getAllByRole("radio")) {
+        expect(radio.getAttribute("aria-checked")).toBe("false");
+      }
+    });
+  }
+
+  it("tapping a Lucide choice on a namespaced task PATCHes lucide:<name>, and No icon clears it", async () => {
+    await renderReady([{ ...BRUSH, id: 32, icon: "lucide:dog" }]);
+    fireEvent.click(screen.getByTestId("definition-32"));
+    let s = sheet();
+    fireEvent.click(iconRadio(s, "Cat"));
+    expect(iconRadio(s, "Cat").getAttribute("aria-checked")).toBe("true");
+    expect(iconRadio(s, "Dog").getAttribute("aria-checked")).toBe("false");
+
+    await act(async () => {
+      fireEvent.click(within(s).getByRole("button", { name: "Save changes" }));
+    });
+    expect((api.writes()[0].body as { icon: string }).icon).toBe("lucide:cat");
+    await waitFor(() => expect(rowIcon(screen.getByTestId("definition-32"))).toBe("cat"));
+
+    fireEvent.click(screen.getByTestId("definition-32"));
+    s = sheet();
+    expect(iconRadio(s, "Cat").getAttribute("aria-checked")).toBe("true");
+    fireEvent.click(iconRadio(s, "No icon"));
+    expect(iconRadio(s, "No icon").getAttribute("aria-checked")).toBe("true");
+    await act(async () => {
+      fireEvent.click(within(s).getByRole("button", { name: "Save changes" }));
+    });
+    expect((api.writes()[1].body as { icon: string | null }).icon).toBeNull();
+  });
+});
+
 /* ── Start date ─────────────────────────────────────────────────────── */
 
 function startDateInput(s: HTMLElement): HTMLInputElement {

admin/src/definitions/DefinitionsTab.tsx

@@ -43,7 +43,12 @@ import {
   PlusGlyph,
   TaskGlyph,
 } from "./glyphs";
-import { DEFINITION_ICONS, DefinitionIcon } from "./definitionIcons";
+import {
+  DEFINITION_ICONS,
+  DefinitionIcon,
+  lucideIconKey,
+  normalizeDefinitionIconName,
+} from "./definitionIcons";
 import "./DefinitionsTab.css";
 
 /** ADMIN-SPEC §1: every scroll column ends with 92px so content clears the tab bar. */
@@ -576,20 +581,23 @@ function EditSheet({
               >
                 <TaskGlyph size={18} />
               </button>
-              {DEFINITION_ICONS.map(({ name, label, Icon }) => (
-                <button
-                  key={name}
-                  type="button"
-                  role="radio"
-                  aria-checked={draft.icon === name}
-                  aria-label={label}
-                  data-icon-option={name}
-                  className={draft.icon === name ? "defs-icon defs-icon--on" : "defs-icon"}
-                  onClick={() => update({ icon: name })}
-                >
-                  <Icon size={18} aria-hidden="true" focusable="false" />
-                </button>
-              ))}
+              {DEFINITION_ICONS.map(({ name, label, Icon }) => {
+                const on = normalizeDefinitionIconName(draft.icon) === name;
+                return (
+                  <button
+                    key={name}
+                    type="button"
+                    role="radio"
+                    aria-checked={on}
+                    aria-label={label}
+                    data-icon-option={name}
+                    className={on ? "defs-icon defs-icon--on" : "defs-icon"}
+                    onClick={() => update({ icon: lucideIconKey(name) })}
+                  >
+                    <Icon size={18} aria-hidden="true" focusable="false" />
+                  </button>
+                );
+              })}
             </div>
           </Field>
 

admin/src/definitions/definitionIcons.tsx

@@ -1,7 +1,8 @@
 /**
  * The shipped Lucide subset a definition's `icon` may name (ADMIN-SPEC §3.3).
  * Only these named imports are bundled — no CDN, no runtime fetch. The stored
- * value is the Lucide kebab-case name, so it stays meaningful to any surface.
+ * value is the namespaced `lucide:<kebab-name>`; a legacy bare `<kebab-name>`
+ * still names the same Lucide entry.
  */
 import {
   Apple,
@@ -91,7 +92,26 @@ export const DEFINITION_ICONS: readonly DefinitionIconEntry[] = [
 
 const BY_NAME = new Map(DEFINITION_ICONS.map((entry) => [entry.name, entry]));
 
-export function findDefinitionIcon(name: string | null): DefinitionIconEntry | null {
+const LUCIDE_PREFIX = "lucide:";
+
+/** The canonical stored key for a Lucide choice, e.g. `lucide:dog`. */
+export function lucideIconKey(name: string): string {
+  return `${LUCIDE_PREFIX}${name}`;
+}
+
+/**
+ * The Lucide name an icon value refers to: `lucide:dog` and a legacy bare
+ * `dog` both give `dog`. Any other namespace (`fa:`, `emoji:`, unknown) and
+ * null give null — the admin has no Lucide entry for them.
+ */
+export function normalizeDefinitionIconName(value: string | null): string | null {
+  if (value === null) return null;
+  if (value.startsWith(LUCIDE_PREFIX)) return value.slice(LUCIDE_PREFIX.length);
+  return value.includes(":") ? null : value;
+}
+
+export function findDefinitionIcon(value: string | null): DefinitionIconEntry | null {
+  const name = normalizeDefinitionIconName(value);
   return name === null ? null : (BY_NAME.get(name) ?? null);
 }