Add IPv6 localhost to default list of trusted domains

[dmitrivMS]

Fixes #243041

[Copilot]

Pull request overview

This PR adds support for IPv6 localhost (::1) as a trusted domain by default, addressing issue #243041. The change ensures that URLs using IPv6 localhost addresses are automatically trusted without requiring explicit configuration.

Key Changes

• Added regex pattern to recognize IPv6 localhost format [::1] with optional port numbers
• Extended isLocalhostAuthority function to check for IPv6 localhost in addition to existing localhost checks
• Added comprehensive test coverage for the new IPv6 localhost functionality

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/vs/platform/url/common/trustedDomains.ts	Adds IPv6 localhost regex pattern and integrates it into the localhost authority check
src/vs/platform/url/test/common/trustedDomains.test.ts	Adds test cases for IPv6 localhost in both the main trusted domains test and dedicated localhost authority tests

Comments suppressed due to low confidence (1)

src/vs/platform/url/test/common/trustedDomains.test.ts:131

• Consider adding negative test cases to ensure the IPv6 regex doesn't incorrectly match invalid patterns. For example, test that [::2] (a different IPv6 address), [::1 (missing closing bracket), or ::1] (missing opening bracket) are correctly rejected.

		test('does not match non-localhost authorities', () => {
			assert.strictEqual(isLocalhostAuthority('example.com'), false);
			assert.strictEqual(isLocalhostAuthority('notlocalhost.com'), false);
			assert.strictEqual(isLocalhostAuthority('127.0.0.2'), false);
			assert.strictEqual(isLocalhostAuthority('192.168.1.1'), false);
		});

[Copilot]

Consider adding a test case for IPv6 localhost without a port (e.g., http://[::1]) to ensure the regex handles this case correctly. Currently, only tests with ports are included.