Guided-auth removal, OAuth smoke testing, and TUI/CLI support (#1531)

* refactor(web): update OAuth E2E tests to use new authentication method

- Replaced `runGuidedAuth` with `authenticate` in the InspectorClient OAuth end-to-end tests to support quick authentication with CIMD pre-registration.
- Updated comments to reflect the change in authentication method and its support for HTTP test metadata URLs.
- Ensured that the tests continue to validate the expected authorization URL after the change.

Additionally, imported `ensureCimdClientRegistration` in the OAuthManager to streamline client registration during the authentication process.

* Guided-auth removal, OAuth smoke testing, and TUI/CLI support

* Added CLI OAuth runner flags tests

* Added clarifying comment on port 0 binding

* README notes on TUI oauth callback port, prettier fixes for CLI tests

* CIMD validation uses inline like EMA IdP

* Fixed TUI test failures from merge

* test: bring 5 OAuth files over the 90 per-file coverage gate

The guided-auth-removal work added/touched several files that fell below
the repo's >=90 per-file coverage gate (npm run coverage). CI doesn't run
the gate (it's local-only), so validate + test:integration passed while
these gaps slipped through. Bring them all back over the line:

- core/auth/node/runner-oauth-callback.ts: test bad-URL/non-http-scheme
  throws, no-port->80 default, and IPv6 hostname bracketing. Annotate the
  provably-dead guards (empty host, out-of-range port, String(err)
  fallback, pathname "/" fallback) -- all rejected by new URL() upstream --
  with justified v8 ignore comments instead of lowering the gate.
- core/auth/cimd.ts: test the AS-doesn't-support-CIMD early return.
- core/react/useClientSettingsDraft.ts: test the functional-updater path,
  the stale-onChange-after-close prev===null guard, and the
  timer-fires-after-close value===null guard.
- ClientSettingsForm.tsx: test the CIMD checkbox toggle and CIMD URL clear.
- clients/tui/src/utils/oauthDisplay.ts: test static/dcr registration
  kinds, the expired IdP session, and the configured-scope/empty-scope
  branches of formatScopes.

npm run coverage now passes (exit 0) across web, cli, tui, launcher.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: cliffhall <cliff@futurescale.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

core/auth/oauth-storage.ts

@@ -9,7 +9,12 @@ import {
 } from "@modelcontextprotocol/sdk/shared/auth.js";
 import type { OAuthStorage } from "./storage.js";
 import { type createOAuthStore, type ServerOAuthState } from "./store.js";
-import type { IdpSessionState, SaveTokensOptions } from "./storage.js";
+import type {
+  IdpSessionState,
+  OAuthClientRegistrationKind,
+  SaveClientInformationOptions,
+  SaveTokensOptions,
+} from "./storage.js";
 
 /**
  * Concrete OAuthStorage implementation parameterized on a Zustand store.
@@ -39,12 +44,21 @@ export class OAuthStorageBase implements OAuthStorage {
     return await OAuthClientInformationSchema.parseAsync(clientInfo);
   }
 
+  getClientRegistrationKind(
+    serverUrl: string,
+  ): OAuthClientRegistrationKind | undefined {
+    return this.store.getState().getServerState(serverUrl)
+      .clientRegistrationKind;
+  }
+
   async saveClientInformation(
     serverUrl: string,
     clientInformation: OAuthClientInformation,
+    options: SaveClientInformationOptions,
   ): Promise<void> {
     this.store.getState().setServerState(serverUrl, {
       clientInformation,
+      clientRegistrationKind: options.registrationKind,
     });
   }
 
@@ -54,6 +68,7 @@ export class OAuthStorageBase implements OAuthStorage {
   ): Promise<void> {
     this.store.getState().setServerState(serverUrl, {
       preregisteredClientInformation: clientInformation,
+      clientRegistrationKind: "static",
     });
   }
 
@@ -64,6 +79,7 @@ export class OAuthStorageBase implements OAuthStorage {
       updates.preregisteredClientInformation = undefined;
     } else {
       updates.clientInformation = undefined;
+      updates.clientRegistrationKind = undefined;
     }
 
     this.store.getState().setServerState(serverUrl, updates);