feat: add Feiling as a built-in v2 pet

src/web-ui/public/agent-companion-pets/openbitfun-girl/README.md

@@ -0,0 +1,30 @@
+# Feiling (绯翎)
+
+![Idle, wave, and pointer-look preview](preview.gif)
+
+Feiling is an original chibi adaptation of the OpenBitFun Girl character, with a
+small, softly oval face, a compact black-and-ivory bell skirt, and tiny legs with
+rounded shoes. Her name combines crimson and feather imagery to evoke Bifang.
+Silver hair and OpenBitFun ornaments preserve the character's identity: both the
+outer outline and the inner opening of each logo are rounded six-sided hexagons.
+The artwork was created with AI image generation from the character illustration,
+the official brand mark, and the requested short-legged proportions.
+
+The built-in picker lists this pet immediately after the default blue-golden
+cat. Feiling keeps the `openbitfun-girl` package ID and paths so saved selections
+continue to work after the display-name change. The earlier OpenBitFun Bifang
+mascot remains a separate preset.
+
+## Sprite contract
+
+- `spriteVersionNumber: 2`; lossless WebP with transparency.
+- Atlas: 1536 × 2288 pixels, 8 columns × 11 rows, 192 × 208 pixels per cell.
+- Rows 0–8: idle, running-right, running-left, waving, jumping, failed, waiting,
+  working (`running`), and review. Frame counts: 6, 8, 8, 4, 5, 8, 6, 6, 6.
+- Rows 9–10: 16 look directions clockwise from up in 22.5-degree steps.
+- The asymmetric hair ornament stays on the character's left; leftward and
+  rightward running were authored separately.
+
+The package uses the existing shared pet renderer and adds no host command,
+protocol change, or configuration migration. `pet.json` can also be used to
+import the package as a v2 pet.

src/web-ui/public/agent-companion-pets/openbitfun-girl/pet.json

@@ -0,0 +1,7 @@
+{
+  "id": "openbitfun-girl",
+  "displayName": "绯翎",
+  "description": "Feiling, a silver-haired short-legged companion with a softly oval face and hollow rounded-hexagon ornaments.",
+  "spriteVersionNumber": 2,
+  "spritesheetPath": "spritesheet.webp"
+}

src/web-ui/src/infrastructure/config/services/AgentCompanionPetService.test.ts

@@ -1,4 +1,5 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest';
+import girlManifest from '../../../../public/agent-companion-pets/openbitfun-girl/pet.json';
 
 const invoke = vi.fn();
 
@@ -46,4 +47,24 @@ describe('AgentCompanionPetService built-in presets', () => {
     });
     expect(invoke).not.toHaveBeenCalled();
   });
+
+  it('lists Feiling second and resolves its packaged v2 layout without host access', async () => {
+    const { listAgentCompanionPets, resolveAgentCompanionPet } = await import('./AgentCompanionPetService');
+    const pets = await listAgentCompanionPets();
+    const girl = pets[1];
+
+    expect(pets.slice(0, 3).map(pet => pet.id)).toEqual([
+      'blue-golden', 'openbitfun-girl', 'deepseek-goldwhale',
+    ]);
+    expect(girl).toMatchObject({
+      ...girlManifest,
+      source: 'preset',
+      spritesheetPath: `/agent-companion-pets/${girlManifest.id}/${girlManifest.spritesheetPath}`,
+      spritesheetMimeType: 'image/webp',
+    });
+    const resolved = await resolveAgentCompanionPet(girl);
+    expect(resolved.src).toBe(girl.spritesheetPath);
+    expect(resolved.layout).toMatchObject({ version: 2, columns: 8, rows: 11, supportsLook: true });
+    expect(invoke).not.toHaveBeenCalled();
+  });
 });

src/web-ui/src/infrastructure/config/services/AgentCompanionPetService.ts

@@ -66,6 +66,16 @@ const BUILTIN_PETS: AgentCompanionPetSelection[] = [
   {
     ...DEFAULT_AGENT_COMPANION_PET,
   },
+  {
+    id: 'openbitfun-girl',
+    displayName: BUILTIN_PET_DISPLAY_NAMES.openbitfunGirl,
+    description: 'Feiling, a silver-haired short-legged companion with a softly oval face and hollow rounded-hexagon ornaments.',
+    source: 'preset',
+    packagePath: `${BUILTIN_PET_BASE}/openbitfun-girl`,
+    spritesheetPath: `${BUILTIN_PET_BASE}/openbitfun-girl/spritesheet.webp`,
+    spritesheetMimeType: 'image/webp',
+    spriteVersionNumber: 2,
+  },
   {
     id: 'deepseek-goldwhale',
     displayName: BUILTIN_PET_DISPLAY_NAMES.goldWhale,

src/web-ui/src/infrastructure/config/services/agentCompanionBuiltinPetMetadata.json

@@ -1,6 +1,7 @@
 {
   "displayNames": {
     "blueGolden": "困困",
+    "openbitfunGirl": "绯翎",
     "goldWhale": "大肥鱼",
     "gugugaga": "咕咕嘎嘎",
     "jiyi": "吉伊"