Switch to VectorEngine gpt-image-2 and edits

Replace uses of the legacy `gpt-image-2-all` model with `gpt-image-2` and standardize image workflows: no-reference generation uses POST /v1/images/generations, any-reference flows use POST /v1/images/edits with multipart `image` parts. Update SKILLs, generation scripts, decision logs, and docs to reflect the contract change and edits-vs-generations guidance. Apply corresponding changes across backend (api-server match3d/puzzle modules, openai image adapter, mappers, telemetry, spacetime client/module), frontend components and services (Match3D, Puzzle, CreativeImageInputPanel, runtime shells), and add new spritesheet/parser files and tests. Also add media/logo.png. These changes align repository code and documentation with the VectorEngine image API contract and update generation/upload handling (green-screen -> alpha processing, spritesheet handling, and related tests).

src/components/rpg-entry/RpgEntryHomeView.recharge.test.tsx

@@ -2100,6 +2100,7 @@ test('logged out bottom nav turns active recommend tab into next action', () =>
 
   const nav = container.querySelector('.platform-bottom-nav');
   expect(nav).toBeTruthy();
+  expect(nav?.classList.contains('platform-bottom-nav')).toBe(true);
   const buttons = within(nav as HTMLElement).getAllByRole('button');
 
   expect(buttons.map((button) => button.textContent)).toEqual([
@@ -2110,6 +2111,12 @@ test('logged out bottom nav turns active recommend tab into next action', () =>
   expect(buttons[0]?.querySelector('.lucide-chevron-down')).toBeTruthy();
   expect(buttons[1]?.querySelector('.lucide-sparkles')).toBeTruthy();
   expect(buttons[2]?.querySelector('.lucide-compass')).toBeTruthy();
+  expect(
+    buttons[1]?.querySelector('.platform-bottom-nav__primary-action'),
+  ).toBeTruthy();
+  expect(
+    buttons[0]?.querySelector('.platform-bottom-nav__active-mark'),
+  ).toBeTruthy();
 });
 
 test('logged in draft bottom tab shows unread marker', () => {

src/components/rpg-entry/RpgEntryHomeView.tsx

@@ -1166,13 +1166,21 @@ function PlatformTabButton({
       className={`platform-bottom-nav__button ${emphasized ? 'platform-bottom-nav__button--primary' : ''} ${active ? 'platform-bottom-nav__button--active' : ''}`}
     >
       <span className="platform-bottom-nav__button-content">
-        <span className="platform-bottom-nav__icon-shell">
+        <span
+          className={`platform-bottom-nav__icon-shell ${emphasized ? 'platform-bottom-nav__primary-action' : ''}`}
+        >
           <Icon className="platform-bottom-nav__icon" />
           {showDot ? (
             <span aria-hidden="true" className="platform-nav-unread-dot" />
           ) : null}
         </span>
         <span className="platform-bottom-nav__label">{label}</span>
+        {active ? (
+          <span
+            aria-hidden="true"
+            className="platform-bottom-nav__active-mark"
+          />
+        ) : null}
       </span>
     </button>
   );