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/grok-web.js

@@ -1,73 +1,38 @@
-
 export default {
-  "id": "grok-web",
-  "alias": "grok-web",
+  id: "grok-web",
+  alias: "grok-web",
+  aliases: [
+    "gw",
+  ],
+  uiAlias: "gw",
   display: {
-      "name": "Grok Web (Subscription)",
-      "icon": "auto_awesome",
-      "color": "#1DA1F2",
-      "textIcon": "GW",
-      "website": "https://grok.com"
+    name: "Grok Web (Subscription)",
+    icon: "auto_awesome",
+    color: "#1DA1F2",
+    textIcon: "GW",
+    website: "https://grok.com",
   },
   category: "webCookie",
-  uiAlias: "gw",
   authType: "cookie",
   authHint: "Paste your sso= cookie value from grok.com",
-  passthroughModels: true,
-  aliases: ["gw"],
-  "transport": {
-    "baseUrl": "https://grok.com/rest/app-chat/conversations/new",
-    "format": "grok-web",
-    "authType": "cookie"
+  transport: {
+    baseUrl: "https://grok.com/rest/app-chat/conversations/new",
+    format: "grok-web",
+    authType: "cookie",
   },
-  "models": [
-    {
-      "id": "grok-3",
-      "name": "Grok 3"
-    },
-    {
-      "id": "grok-3-mini",
-      "name": "Grok 3 Mini (Thinking)"
-    },
-    {
-      "id": "grok-3-thinking",
-      "name": "Grok 3 Thinking"
-    },
-    {
-      "id": "grok-4",
-      "name": "Grok 4"
-    },
-    {
-      "id": "grok-4-mini",
-      "name": "Grok 4 Mini (Thinking)"
-    },
-    {
-      "id": "grok-4-thinking",
-      "name": "Grok 4 Thinking"
-    },
-    {
-      "id": "grok-4-heavy",
-      "name": "Grok 4 Heavy (SuperGrok)"
-    },
-    {
-      "id": "grok-4.1-mini",
-      "name": "Grok 4.1 Mini (Thinking)"
-    },
-    {
-      "id": "grok-4.1-fast",
-      "name": "Grok 4.1 Fast"
-    },
-    {
-      "id": "grok-4.1-expert",
-      "name": "Grok 4.1 Expert"
-    },
-    {
-      "id": "grok-4.1-thinking",
-      "name": "Grok 4.1 Thinking"
-    },
-    {
-      "id": "grok-4.2",
-      "name": "Grok 4.2 (4.20 Beta)"
-    }
-  ]
+  models: [
+    { id: "grok-3", name: "Grok 3" },
+    { id: "grok-3-mini", name: "Grok 3 Mini (Thinking)" },
+    { id: "grok-3-thinking", name: "Grok 3 Thinking" },
+    { id: "grok-4", name: "Grok 4" },
+    { id: "grok-4-mini", name: "Grok 4 Mini (Thinking)" },
+    { id: "grok-4-thinking", name: "Grok 4 Thinking" },
+    { id: "grok-4-heavy", name: "Grok 4 Heavy (SuperGrok)" },
+    { id: "grok-4.1-mini", name: "Grok 4.1 Mini (Thinking)" },
+    { id: "grok-4.1-fast", name: "Grok 4.1 Fast" },
+    { id: "grok-4.1-expert", name: "Grok 4.1 Expert" },
+    { id: "grok-4.1-thinking", name: "Grok 4.1 Thinking" },
+    { id: "grok-4.2", name: "Grok 4.2 (4.20 Beta)" },
+  ],
+  passthroughModels: true,
 };