test(e2e): add solo modifier indicator smoke guard

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

.sisyphus/notepads/polish-t2/learnings.md

@@ -69,3 +69,18 @@ Probable file: add test to `solo-smoke.spec.ts` (T2 added it as the canary) or e
 
 - Added optional `baseAttr?: ChessAttrKey` to `ModifierDescriptor` and set `hp-bonus` to `baseAttr: "Hp"`.
 - Removed hardcoded `HpBonus`/`RangeBonus` aliasing from `getModifierSource`; source matching now uses `descriptor.baseAttr ?? descriptor.attrName` directly.
+
+## [2026-04-19 14:03] Task: commit-4 solo modifier indicator e2e
+
+- Added a solo-smoke e2e that seeds one custom profile in localStorage, selects it in the lobby picker, enters solo mode, and asserts a `modifier-indicator-*` node renders.
+- Guarded lobby navigation by opening the rules drawer only when `profile-picker` is initially hidden, matching existing T2 lobby interaction patterns.
+
+## [2026-04-19 14:07] Task: solo indicator test fixture correction
+
+- Initial fixture used `color: "white"` and no `layoutId`; the option did not appear in the lobby picker during full e2e.
+- Corrected fixture to mirror known-good T2 shape (`layoutId: "classic"`, `color: "both"`), which allows picker selection and solo badge assertion.
+
+## [2026-04-19 14:09] Task: solo indicator test storage key mismatch
+
+- Root cause of missing picker option: seeded localStorage key used `paratype-chess:modifier-profiles:v1`, but runtime library key is `houserules:modifier-profiles:v1`.
+- Updating the key fixed profile loading in the lobby picker for the solo smoke regression.

packages/chess/e2e/solo-smoke.spec.ts

@@ -35,6 +35,49 @@ test.describe('Solo-play smoke (T2 preview tests)', () => {
     await expect(page.locator('[data-square="e2"] [data-piece]')).toHaveCount(0);
   });
 
+  test('solo play with modifier profile renders modifier-indicator dots', async ({ page }) => {
+    const LIBRARY_KEY = 'houserules:modifier-profiles:v1';
+    const entry = {
+      id: 'solo-smoke-indicator',
+      name: 'Solo Smoke Indicator',
+      profile: {
+        id: 'solo-smoke-indicator',
+        name: 'Solo Smoke Indicator',
+        description: '',
+        layoutId: 'classic',
+        perType: [
+          { kind: 'hp-bonus', pieceType: 'pawn', color: 'both', value: 1 },
+        ],
+        perInstance: [],
+        version: 1,
+        source: 'custom',
+      },
+      starred: false,
+      updatedAt: Date.now(),
+    };
+
+    await page.goto('/');
+    await page.evaluate(
+      ({ key, e }) => localStorage.setItem(key, JSON.stringify([e])),
+      { key: LIBRARY_KEY, e: entry },
+    );
+    await page.reload();
+
+    const picker = page.getByTestId('profile-picker');
+    if (!(await picker.isVisible())) {
+      await page.locator('[data-action="open-rules-drawer"]').click();
+    }
+    await expect(picker).toBeVisible();
+    await picker.selectOption('solo-smoke-indicator');
+
+    await page.locator('[data-action="play-solo"]').click();
+    await page.waitForURL('**/game', { timeout: 5000 });
+
+    await expect(page.locator('[data-testid^="modifier-indicator-"]').first()).toBeVisible({
+      timeout: 3000,
+    });
+  });
+
   test('can play multiple moves in sequence (4-ply)', async ({ page }) => {
     await page.locator('[data-action="play-solo"]').click();
     await page.waitForURL('**/game');
@@ -167,4 +210,3 @@ test.describe('Solo-play smoke (T2 preview tests)', () => {
     });
   });
 });
-