Merge remote-tracking branch 'origin/master' into gitea/feature/end

Resolved conflicts taking origin/master (v0.5.55) as canonical, with local
features re-applied:
- runtime log level (LOG_LEVEL env + dashboard Settings → Logging, applied
  immediately and persisted across restarts)
- free/noAuth provider enable/disable toggle via providerStrategies.enabled
- parallel model testing (Test All Models / Test Selected Keys)

open-sse/providers/registry/zed.js

@@ -0,0 +1,71 @@
+// Zed provider — RSA keypair callback auth (NOT standard OAuth).
+export default {
+  id: "zed",
+  priority: 10,
+  alias: "zd",
+  uiAlias: "zd",
+  hidden: true,
+  display: {
+    name: "Zed",
+    icon: "code",
+    color: "#A855F7",
+    website: "https://zed.dev",
+    notice: {
+      signupUrl: "https://zed.dev/native_app_signin",
+    },
+  },
+  category: "oauth",
+  authType: "oauth",
+  hasOAuth: true,
+
+  transport: {
+    // Zed hosted LLM aggregator: cloud.zed.dev/completions is a
+    // multi-format proxy fronting Anthropic/OpenAI/Google/xAI depending on the model.
+    // Wire protocol = NDJSON/SSE-ish stream authenticated with a short-lived LLM bearer
+    // token exchanged from the RSA-decrypted access_token (see open-sse/shared/zedAuth).
+    baseUrl: "https://cloud.zed.dev/completions",
+    format: "openai",
+    forceStream: true,
+    headers: {
+      "content-type": "application/json",
+    },
+    // Auth scheme is non-standard: "Authorization: <user_id> <access_token>" plus a duplicate
+    // x-zed-cloud-token header (verified in zed_account.rs build_authorization_header +
+    // cloud fetch). Executor builds both; scheme here is a marker for config-driven tooling.
+    auth: {
+      combined: true,
+      header: "Authorization",
+      scheme: "<user_id> <access_token>", // placeholder — real value built in executor
+    },
+    usage: {
+      url: "https://cloud.zed.dev/client/users/me", // verified in zed_account.rs
+    },
+    // Live catalog discovery — Zed's hosted model list changes frequently and is fetched
+    // per-connection rather than hardcoded.
+    modelsUrl: "https://cloud.zed.dev/models",
+  },
+
+  // Empty static catalog + passthrough: Zed fronts a rotating set of upstream models
+  // (Claude/GPT/Gemini/Grok). Resolved live via modelsUrl; any client-sent model id is
+  // forwarded as-is rather than validated against a frozen list.
+  models: [],
+  passthroughModels: true,
+
+  oauth: {
+    // Zed auth flow is RSA-based, NOT OAuth2/PKCE:
+    //   1. App generates RSA-2048 keypair locally (PKCS#1 DER, URL-safe base64).
+    //   2. Bind random TCP port on 127.0.0.1.
+    //   3. Open https://zed.dev/native_app_signin?native_app_port={port}&native_app_public_key={pub}.
+    //   4. After login, browser redirects http://127.0.0.1:{port}/?user_id=...&access_token=...
+    //      where access_token = base64(RSA-encrypted plaintext token).
+    //   5. Decrypt with private key (OAEP-SHA256, fallback PKCS1v15). Store user_id + plaintext token.
+    // No clientId/clientSecret/tokenUrl/refreshUrl — long-lived access_token, no refresh.
+    authorizeUrl: "https://zed.dev/native_app_signin",
+    platform: "zed",
+    rsaKeyExchange: true, // new flag: signals frontend/router this flow needs local RSA + TCP listener.
+  },
+
+  features: {
+    usage: true,
+  },
+};