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>

clients/web/src/utils/clearServerOAuthState.ts

@@ -0,0 +1,32 @@
+import { getBrowserOAuthStorage } from "@inspector/core/auth/browser/index.js";
+import { getOAuthServerUrl } from "@inspector/core/mcp/config.js";
+import type { InspectorClient } from "@inspector/core/mcp/inspectorClient.js";
+import type { MCPServerConfig } from "@inspector/core/mcp/types.js";
+
+export interface ClearServerOAuthStateParams {
+  config: MCPServerConfig;
+  /** When set and this server is the active connection, clear via the live client. */
+  inspectorClient?: InspectorClient | null;
+  isActiveConnection: boolean;
+}
+
+/**
+ * Clear persisted OAuth state (tokens, DCR/CIMD client id, PKCE, etc.) for an
+ * HTTP MCP server. When clearing the active connection, uses the live client so
+ * in-memory flow state is reset too.
+ */
+export function clearServerOAuthState(
+  params: ClearServerOAuthStateParams,
+): boolean {
+  const serverUrl = getOAuthServerUrl(params.config);
+  if (!serverUrl) {
+    return false;
+  }
+
+  if (params.isActiveConnection && params.inspectorClient) {
+    params.inspectorClient.clearOAuthTokens();
+  } else {
+    getBrowserOAuthStorage().clear(serverUrl);
+  }
+  return true;
+}