fix(editor): the S3 Sense joins the ESP32 starter section; no separate Seeed block

The ESP32 section already carries the XIAO family as its generation
representatives, so a Seeed Studio section repeated the brand with a single
card. The Sense now sits next to its sibling XIAO S3 (operator call,
2026-08-28).

frontend/src/__tests__/new-project-starter-sections.test.ts

@@ -2,10 +2,11 @@
  * NewProjectDialog starter sections — display order and overlay cards.
  *
  * The dialog hardcodes its sections; overlay-registered kinds (M5Stack,
- * the partner sections, XIAO C6, XIAO RP2040) surface only when the private
- * overlay registered them. Guards the operator's requested order: the
- * partner sections (M5Stack, Seeed Studio, DFRobot, Pimoroni, Espressif)
- * sit between ESP32 and STM32, and an OSS build shows none of them empty.
+ * the partner sections, the XIAO overlay variants) surface only when the
+ * private overlay registered them. Guards the operator's requested order:
+ * the partner sections (M5Stack, DFRobot, Pimoroni, Espressif) sit between
+ * ESP32 and STM32, Seeed boards live inside the chip-family sections, and
+ * an OSS build shows no empty partner block.
  */
 import { describe, it, expect } from 'vitest';
 import { buildStarterSections } from '../components/editor/NewProjectDialog';
@@ -46,6 +47,16 @@ describe('NewProjectDialog starter sections', () => {
     expect(m5.entries[0].blurb).toBe('ESP32-S3 card computer');
   });
 
+  it('the S3 Sense joins the ESP32 section, not a section of its own', () => {
+    const secs = buildStarterSections([def('xiao-esp32s3-sense', 'XIAO ESP32-S3 Sense', 'x')]);
+    expect(secs.map((s) => s.title)).not.toContain('Seeed Studio');
+    const esp32 = secs.find((s) => s.title === 'ESP32')!;
+    expect(esp32.entries.map((e) => e.kind)).toContain('xiao-esp32s3-sense');
+    // Right after its sibling XIAO S3.
+    const kinds = esp32.entries.map((e) => e.kind);
+    expect(kinds.indexOf('xiao-esp32s3-sense')).toBe(kinds.indexOf('xiao-esp32-s3') + 1);
+  });
+
   it('full partner overlay: sections sit between M5Stack and STM32, catalog order', () => {
     const defs = [
       def('cardputer-adv', 'M5 Cardputer ADV', 'x'),
@@ -61,7 +72,6 @@ describe('NewProjectDialog starter sections', () => {
       'Arduino',
       'ESP32',
       'M5Stack',
-      'Seeed Studio',
       'DFRobot',
       'Pimoroni',
       'Espressif',

frontend/src/components/editor/NewProjectDialog.tsx

@@ -256,12 +256,16 @@ export function buildStarterSections(defs: ProBoardDef[]): StarterSection[] {
     },
     // One card per ESP32 chip generation, XIAO variant preferred where
     // Seeed makes one: classic → DevKit V1, S3/C3 → XIAO, C6 → XIAO (overlay).
+    // The S3 Sense sits here next to its sibling — a separate Seeed section
+    // would repeat a brand this section already carries (operator call,
+    // 2026-08-28).
     {
       title: 'ESP32',
       entries: [
         oss('esp32'),
         oss('esp32-cam'),
         oss('xiao-esp32-s3'),
+        ...pro('xiao-esp32s3-sense'),
         oss('xiao-esp32-c3'),
         ...pro('xiao-esp32c6'),
       ],
@@ -272,10 +276,8 @@ export function buildStarterSections(defs: ProBoardDef[]): StarterSection[] {
     { title: 'M5Stack', entries: [...pro('cardputer-adv'), ...pro('m5stack-core')] },
     // Hardware partners (overlay kinds, same shape as M5Stack): each section
     // lists only the boards the overlay actually registered, so an OSS build
-    // and launch-embargoed items (e.g. the Espressif devkits pre-launch)
-    // simply render nothing. The XIAO S3/C3/C6 and XIAO RP2040 stay in the
-    // chip-family sections above as the generation representatives.
-    { title: 'Seeed Studio', entries: [...pro('xiao-esp32s3-sense')] },
+    // and launch-embargoed items simply render nothing. Seeed gets no section
+    // of its own — its boards live in the chip-family sections above.
     { title: 'DFRobot', entries: [...pro('unihiker-m10')] },
     {
       title: 'Pimoroni',