refactor(providers): one record per provider, ten name-keyed tables derived from it

Step 2 of the provider refactor plan. lib/providers.ts holds one record per
provider (SDK kind, credential kind, env prefix, default URL, picker group,
notes and base URL hints in four languages, and the short model list of the
six providers that cannot list models). ProviderName is now the record's
key set and lib/types/model-config.ts re-exports the record as PROVIDER_INFO,
so the twelve importers are unchanged.

Derived from the record, under their old names and in their old files:
FIXED_CRED_PROVIDERS, PROVIDER_LOGO_MAP and chatRequestUrl's own-path list
(model-config.ts), SINGLE_SYSTEM_PROVIDERS, PROVIDER_ENV_VARS and
SDK_KNOWS_ENDPOINT (ai-providers.ts), PROVIDER_GROUPS and OPTIONS_OPEN
(provider-setup.ts), NO_KEY_NEEDED (provider-models route).
tests/unit/providers.test.ts freezes the old tables' values and checks the
derived ones against them. The record is written in the picker's order, so
the provider lists in two 'No AI provider configured' messages change order;
those two snapshot rows are the only snapshot change.

lib/types/model-config.ts

@@ -1,30 +1,13 @@
 // Types for multi-provider model configuration
 
-export type ProviderName =
-    | "openai"
-    | "anthropic"
-    | "google"
-    | "vertexai"
-    | "azure"
-    | "bedrock"
-    | "ollama"
-    | "openrouter"
-    | "aihubmix"
-    | "deepseek"
-    | "siliconflow"
-    | "sglang"
-    | "gateway"
-    | "edgeone"
-    | "doubao"
-    | "modelscope"
-    | "glm"
-    | "qwen"
-    | "qiniu"
-    | "kimi"
-    | "minimax"
-    | "novita"
-    | "mimo"
-    | "atlascloud"
+import { PROVIDER_NAMES, PROVIDERS, type ProviderName } from "@/lib/providers"
+
+// The provider record, under the name the rest of the app imports it by
+export {
+    type ModelListStyle,
+    PROVIDERS as PROVIDER_INFO,
+    type ProviderName,
+} from "@/lib/providers"
 
 // Individual model configuration
 export interface ModelConfig {
@@ -86,185 +69,18 @@ export interface FlattenedModel {
 
 // Providers whose server credentials live in fixed env vars
 // (AWS_ACCESS_KEY_ID, GOOGLE_VERTEX_API_KEY, OLLAMA_API_KEY) with no
-// apiKeyEnv redirection support — their credentials are global
-export const FIXED_CRED_PROVIDERS: ProviderName[] = [
-    "bedrock",
-    "vertexai",
-    "ollama",
-]
+// apiKeyEnv redirection support: their credentials are global
+export const FIXED_CRED_PROVIDERS: ProviderName[] = PROVIDER_NAMES.filter(
+    (p) => PROVIDERS[p].fixedCredentials,
+)
 
-// Map provider names to models.dev logo names
-export const PROVIDER_LOGO_MAP: Record<string, string> = {
-    openai: "openai",
-    anthropic: "anthropic",
-    google: "google",
-    azure: "azure",
-    bedrock: "amazon-bedrock",
-    openrouter: "openrouter",
-    aihubmix: "aihubmix",
-    deepseek: "deepseek",
-    siliconflow: "siliconflow",
-    sglang: "openai", // SGLang is OpenAI-compatible
-    gateway: "vercel",
-    edgeone: "tencent-cloud",
-    vertexai: "google",
-    doubao: "bytedance",
-    modelscope: "modelscope",
-    minimax: "minimax",
-    novita: "novita",
-    mimo: "xiaomi",
-    atlascloud: "openai",
-}
-
-/** How a provider lists its models (see lib/provider-models.ts) */
-export type ModelListStyle =
-    | "openai"
-    | "anthropic"
-    | "google"
-    | "ollama"
-    | "openrouter"
-    | "aihubmix"
-    | "gateway"
-
-// Provider metadata. apiKeyUrl is the page where users create a key.
-// modelList is missing where a key alone cannot list the models (Bedrock,
-// Vertex, Azure) or the list is not reliable (Doubao, MiniMax).
-export const PROVIDER_INFO: Record<
-    ProviderName,
-    {
-        label: string
-        defaultBaseUrl?: string
-        apiKeyUrl?: string
-        modelList?: ModelListStyle
-    }
-> = {
-    openai: {
-        label: "OpenAI",
-        defaultBaseUrl: "https://api.openai.com/v1",
-        apiKeyUrl: "https://platform.openai.com/api-keys",
-        modelList: "openai",
-    },
-    anthropic: {
-        label: "Anthropic",
-        defaultBaseUrl: "https://api.anthropic.com/v1",
-        apiKeyUrl: "https://platform.claude.com/settings/keys",
-        modelList: "anthropic",
-    },
-    google: {
-        label: "Google",
-        defaultBaseUrl: "https://generativelanguage.googleapis.com/v1beta",
-        apiKeyUrl: "https://aistudio.google.com/apikey",
-        modelList: "google",
-    },
-    vertexai: { label: "Google Vertex AI" },
-    azure: {
-        label: "Azure OpenAI",
-        defaultBaseUrl: "https://your-resource.openai.azure.com/openai",
-    },
-    bedrock: { label: "Amazon Bedrock" },
-    ollama: {
-        label: "Ollama",
-        defaultBaseUrl: "https://ollama.com/api",
-        apiKeyUrl: "https://ollama.com/settings/keys",
-        modelList: "ollama",
-    },
-    openrouter: {
-        label: "OpenRouter",
-        defaultBaseUrl: "https://openrouter.ai/api/v1",
-        apiKeyUrl: "https://openrouter.ai/keys",
-        modelList: "openrouter",
-    },
-    aihubmix: {
-        label: "AIHubMix",
-        defaultBaseUrl: "https://aihubmix.com/v1",
-        apiKeyUrl: "https://aihubmix.com/token",
-        modelList: "aihubmix",
-    },
-    deepseek: {
-        label: "DeepSeek",
-        defaultBaseUrl: "https://api.deepseek.com/v1",
-        apiKeyUrl: "https://platform.deepseek.com/api_keys",
-        modelList: "openai",
-    },
-    siliconflow: {
-        label: "SiliconFlow",
-        defaultBaseUrl: "https://api.siliconflow.cn/v1",
-        apiKeyUrl: "https://cloud.siliconflow.cn/account/ak",
-        modelList: "openai",
-    },
-    sglang: {
-        label: "SGLang",
-        defaultBaseUrl: "http://127.0.0.1:8000/v1",
-        modelList: "openai",
-    },
-    gateway: {
-        label: "AI Gateway",
-        defaultBaseUrl: "https://ai-gateway.vercel.sh/v1/ai",
-        apiKeyUrl: "https://vercel.com/ai-gateway",
-        modelList: "gateway",
-    },
-    edgeone: { label: "EdgeOne Pages" },
-    doubao: {
-        label: "Doubao (ByteDance)",
-        defaultBaseUrl: "https://ark.cn-beijing.volces.com/api/v3",
-        apiKeyUrl:
-            "https://console.volcengine.com/ark/region:ark+cn-beijing/apiKey",
-    },
-    modelscope: {
-        label: "ModelScope",
-        defaultBaseUrl: "https://api-inference.modelscope.cn/v1",
-        apiKeyUrl: "https://modelscope.cn/my/myaccesstoken",
-        modelList: "openai",
-    },
-    glm: {
-        label: "GLM (Zhipu)",
-        defaultBaseUrl: "https://open.bigmodel.cn/api/paas/v4",
-        apiKeyUrl: "https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys",
-        modelList: "openai",
-    },
-    qwen: {
-        label: "Qwen (Alibaba)",
-        defaultBaseUrl: "https://dashscope.aliyuncs.com/compatible-mode/v1",
-        apiKeyUrl: "https://bailian.console.aliyun.com/?tab=model#/api-key",
-        modelList: "openai",
-    },
-    qiniu: {
-        label: "Qiniu",
-        defaultBaseUrl: "https://api.qnaigc.com/v1",
-        apiKeyUrl: "https://www.qiniu.com/ai/models",
-        modelList: "openai",
-    },
-    kimi: {
-        label: "Kimi (Moonshot)",
-        defaultBaseUrl: "https://api.moonshot.cn/v1",
-        apiKeyUrl: "https://platform.moonshot.cn/console/api-keys",
-        modelList: "openai",
-    },
-    minimax: {
-        label: "MiniMax",
-        defaultBaseUrl: "https://api.minimaxi.com/anthropic",
-        apiKeyUrl:
-            "https://platform.minimaxi.com/user-center/basic-information/interface-key",
-    },
-    novita: {
-        label: "Novita AI",
-        defaultBaseUrl: "https://api.novita.ai/openai",
-        apiKeyUrl: "https://novita.ai/dashboard/key",
-        modelList: "openai",
-    },
-    mimo: {
-        label: "MiMo (Xiaomi)",
-        defaultBaseUrl: "https://api.xiaomimimo.com/v1",
-        apiKeyUrl: "https://platform.xiaomimimo.com/#/console/api-keys",
-        modelList: "openai",
-    },
-    atlascloud: {
-        label: "Atlas Cloud",
-        defaultBaseUrl: "https://api.atlascloud.ai/v1",
-        apiKeyUrl: "https://www.atlascloud.ai/console/api-keys",
-        modelList: "openai",
-    },
-}
+// models.dev logo names that differ from the provider name
+export const PROVIDER_LOGO_MAP: Record<string, string> = Object.fromEntries(
+    PROVIDER_NAMES.flatMap((p) => {
+        const logo = PROVIDERS[p].logo
+        return logo ? [[p, logo]] : []
+    }),
+)
 
 // Suggested models per provider for quick add
 export const SUGGESTED_MODELS: Partial<Record<ProviderName, string[]>> = {
@@ -547,7 +363,7 @@ export function createProviderConfig(provider: ProviderName): ProviderConfig {
         id: generateId(),
         provider,
         apiKey: "",
-        baseUrl: PROVIDER_INFO[provider].defaultBaseUrl,
+        baseUrl: PROVIDERS[provider].defaultBaseUrl,
         models: [],
     }
 }
@@ -567,7 +383,7 @@ export function flattenModels(config: MultiModelConfig): FlattenedModel[] {
     for (const provider of config.providers) {
         // Use custom name if provided, otherwise use default provider label
         const providerLabel =
-            provider.name || PROVIDER_INFO[provider.provider].label
+            provider.name || PROVIDERS[provider.provider].label
 
         for (const model of provider.models) {
             models.push({
@@ -635,14 +451,5 @@ export function chatRequestUrl(
     if (provider === "ollama") return `${ollamaApiUrl(url)}/chat`
     // These SDKs build their own paths (or, for MiniMax, pick the protocol
     // from the URL)
-    const ownPaths: ProviderName[] = [
-        "google",
-        "vertexai",
-        "azure",
-        "bedrock",
-        "gateway",
-        "minimax",
-        "edgeone",
-    ]
-    return ownPaths.includes(provider) ? null : `${url}/chat/completions`
+    return PROVIDERS[provider].ownRequestPath ? null : `${url}/chat/completions`
 }