feat: integrate Pi backend and Pi Web

pi-web/app/api/auth/all-providers/route.ts

@@ -0,0 +1,40 @@
+import { ModelRuntime } from "@earendil-works/pi-coding-agent";
+
+export const dynamic = "force-dynamic";
+
+// Providers that use OAuth — handled separately via /api/auth/providers
+const OAUTH_PROVIDER_IDS = new Set(["anthropic", "github-copilot", "openai-codex"]);
+
+export async function GET() {
+  const modelRuntime = await ModelRuntime.create();
+  const all = modelRuntime.getModels();
+
+  // Deduplicate by provider, skip OAuth-only providers and custom providers (source=models_json_key)
+  const seen = new Set<string>();
+  const result: {
+    id: string;
+    displayName: string;
+    configured: boolean;
+    source?: string;
+    modelCount: number;
+  }[] = [];
+
+  for (const provider of modelRuntime.getProviders()) {
+    if (seen.has(provider.id)) continue;
+    seen.add(provider.id);
+    if (OAUTH_PROVIDER_IDS.has(provider.id) || !provider.auth.apiKey?.login) continue;
+    const status = modelRuntime.getProviderAuthStatus(provider.id);
+    // Skip providers whose key comes from models.json (those are custom providers)
+    if (status.source === "models_json_key") continue;
+    const modelCount = all.filter((model) => model.provider === provider.id).length;
+    result.push({
+      id: provider.id,
+      displayName: provider.name,
+      configured: status.configured,
+      source: status.source,
+      modelCount,
+    });
+  }
+
+  return Response.json({ providers: result });
+}