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/byteplus.js

@@ -1,56 +1,34 @@
-
 export default {
-  "id": "byteplus",
-  "alias": "byteplus",
+  id: "byteplus",
+  alias: "byteplus",
+  aliases: [
+    "bpm",
+  ],
+  uiAlias: "bpm",
   display: {
-      "name": "BytePlus ModelArk",
-      "icon": "cloud",
-      "color": "#2563EB",
-      "textIcon": "BP",
-      "website": "https://console.byteplus.com/ark",
-      "notice": {
-          "text": "Free credits for new accounts. Access to Seed 2.0, Kimi K2 Thinking, GLM 4.7, GPT-OSS-120B models.",
-          "apiKeyUrl": "https://console.byteplus.com/ark/region:ark+ap-southeast-1/apiKey"
-      }
+    name: "BytePlus ModelArk",
+    icon: "cloud",
+    color: "#2563EB",
+    textIcon: "BP",
+    website: "https://console.byteplus.com/ark",
+    notice: {
+      text: "Free credits for new accounts. Access to Seed 2.0, Kimi K2 Thinking, GLM 4.7, GPT-OSS-120B models.",
+      apiKeyUrl: "https://console.byteplus.com/ark/region:ark+ap-southeast-1/apiKey",
+    },
   },
   category: "freeTier",
-  uiAlias: "bpm",
-  aliases: ["bpm"],
-  "transport": {
-    "baseUrl": "https://ark.ap-southeast.bytepluses.com/api/coding/v3/chat/completions",
-    "headers": {}
+  transport: {
+    baseUrl: "https://ark.ap-southeast.bytepluses.com/api/coding/v3/chat/completions",
+    headers: {},
   },
-  media: {
-    serviceKinds: ["llm"]
-  },
-  "models": [
-    {
-      "id": "seed-2-0-pro-260328",
-      "name": "Seed 2.0 Pro"
-    },
-    {
-      "id": "seed-2-0-code-preview-260328",
-      "name": "Seed 2.0 Code Preview"
-    },
-    {
-      "id": "seed-2-0-mini-260215",
-      "name": "Seed 2.0 Mini"
-    },
-    {
-      "id": "seed-2-0-lite-260228",
-      "name": "Seed 2.0 Lite"
-    },
-    {
-      "id": "kimi-k2-thinking-251104",
-      "name": "Kimi K2 Thinking"
-    },
-    {
-      "id": "glm-4-7-251222",
-      "name": "GLM 4.7"
-    },
-    {
-      "id": "gpt-oss-120b-250805",
-      "name": "GPT-OSS-120B"
-    }
-  ]
+  models: [
+    { id: "seed-2-0-pro-260328", name: "Seed 2.0 Pro" },
+    { id: "seed-2-0-code-preview-260328", name: "Seed 2.0 Code Preview" },
+    { id: "seed-2-0-mini-260215", name: "Seed 2.0 Mini" },
+    { id: "seed-2-0-lite-260228", name: "Seed 2.0 Lite" },
+    { id: "kimi-k2-thinking-251104", name: "Kimi K2 Thinking" },
+    { id: "glm-4-7-251222", name: "GLM 4.7" },
+    { id: "gpt-oss-120b-250805", name: "GPT-OSS-120B" },
+  ],
+  serviceKinds: ["llm"],
 };