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/storage.ts

@@ -3,6 +3,7 @@ import type {
   OAuthTokens,
   OAuthMetadata,
 } from "@modelcontextprotocol/sdk/shared/auth.js";
+import type { OAuthClientRegistrationKind } from "./types.js";
 
 /**
  * Abstract storage interface for OAuth state
@@ -13,6 +14,12 @@ export interface SaveTokensOptions {
   enterpriseManaged?: boolean;
 }
 
+export type { OAuthClientRegistrationKind };
+
+export interface SaveClientInformationOptions {
+  registrationKind: "dcr" | "cimd";
+}
+
 export interface OAuthStorage {
   /**
    * Get client information (preregistered or dynamically registered)
@@ -22,12 +29,20 @@ export interface OAuthStorage {
     isPreregistered?: boolean,
   ): Promise<OAuthClientInformation | undefined>;
 
+  /**
+   * Get how the dynamic client registration slot was established.
+   */
+  getClientRegistrationKind(
+    serverUrl: string,
+  ): OAuthClientRegistrationKind | undefined;
+
   /**
    * Save client information (dynamically registered)
    */
   saveClientInformation(
     serverUrl: string,
     clientInformation: OAuthClientInformation,
+    options: SaveClientInformationOptions,
   ): Promise<void>;
 
   /**
@@ -93,12 +108,12 @@ export interface OAuthStorage {
   clearScope(serverUrl: string): void;
 
   /**
-   * Get server metadata (for guided mode)
+   * Get server metadata discovered during OAuth
    */
   getServerMetadata(serverUrl: string): OAuthMetadata | null;
 
   /**
-   * Save server metadata (for guided mode)
+   * Save server metadata discovered during OAuth
    */
   saveServerMetadata(serverUrl: string, metadata: OAuthMetadata): Promise<void>;