refactor(registry): B2 migrate to LiteLLM-style schema — unified models[] with kind field

- 71 registry files: flat `media.*Config.models` → `models[]` with `kind` field
- `media` wrapper removed → serviceKinds, *Config fields promoted top-level
- `type` field renamed to `kind` (llm/image/tts/stt/embedding/embedding/video/music)
- providers/index.js: PROVIDER_MEDIA now built from flat top-level media fields
- shared/constants/providers.js: buildProviderEntry reads flat top-level media fields
- route /v1/models: modelKind() uses kind||type; removed subConfig merge block
- models/info route: removed sub-config fallback lookup (all models in PROVIDER_MODELS)
- ttsProviders/index.js: synthesizeViaConfig reads tts models from PROVIDER_MODELS
- test-models route, helpers.js, validate route: kind||type compat
- Baselines: PROVIDERS 62/62 ✅, Alias 90/90 ✅

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/providers/registry/qwen.js

@@ -1,35 +1,31 @@
-
 export default {
-  "id": "qwen",  alias: "qw",  display: { name: "Qwen Code", icon: "psychology", color: "#10B981", website: "https://chat.qwen.ai", notice: { signupUrl: "https://chat.qwen.ai" } },
+  id: "qwen",
+  alias: "qw",
+  display: {
+    name: "Qwen Code",
+    icon: "psychology",
+    color: "#10B981",
+    website: "https://chat.qwen.ai",
+    notice: {
+      signupUrl: "https://chat.qwen.ai",
+    },
+  },
   category: "oauth",
-  "transport": {
-    "baseUrl": "https://portal.qwen.ai/v1/chat/completions"
+  transport: {
+    baseUrl: "https://portal.qwen.ai/v1/chat/completions",
   },
-  "oauth": {
-    "clientId": "f0304373b74a44d2b584a3fb70ca9e56",
-    "deviceCodeUrl": "https://chat.qwen.ai/api/v1/oauth2/device/code",
-    "tokenUrl": "https://chat.qwen.ai/api/v1/oauth2/token",
-    "scope": "openid profile email model.completion",
-    "codeChallengeMethod": "S256"
-  ,
-    refreshLeadMs: 1200000
+  models: [
+    { id: "qwen3-coder-plus", name: "Qwen3 Coder Plus" },
+    { id: "qwen3-coder-flash", name: "Qwen3 Coder Flash" },
+    { id: "vision-model", name: "Qwen3 Vision Model" },
+    { id: "coder-model", name: "Qwen3.6 Coder Model" },
+  ],
+  oauth: {
+    clientId: "f0304373b74a44d2b584a3fb70ca9e56",
+    deviceCodeUrl: "https://chat.qwen.ai/api/v1/oauth2/device/code",
+    tokenUrl: "https://chat.qwen.ai/api/v1/oauth2/token",
+    scope: "openid profile email model.completion",
+    codeChallengeMethod: "S256",
+    refreshLeadMs: 1200000,
   },
-  "models": [
-    {
-      "id": "qwen3-coder-plus",
-      "name": "Qwen3 Coder Plus"
-    },
-    {
-      "id": "qwen3-coder-flash",
-      "name": "Qwen3 Coder Flash"
-    },
-    {
-      "id": "vision-model",
-      "name": "Qwen3 Vision Model"
-    },
-    {
-      "id": "coder-model",
-      "name": "Qwen3.6 Coder Model"
-    }
-  ]
 };