feat: actionable internal-host allowlist error guidance for desktop/BYOK providers #14644

Job	Run time
Resolve runner profiles	9s
Static gate	11s
Detect validation scopes	16s
UI P0 smoke	1m 56s
Web workspace tests	3m 20s
Preflight	3m 6s
Playwright visual (entry-navigation)	3m 26s
E2E Vitest	2m 21s
Playwright visual (settings-workspace)	3m 10s
Workspace unit tests	1m 22s
UI P0 (project-runtime)	3m 55s
UI P0 (project-workspace)	6m 37s
UI P0 (entry-settings)	4m 33s
UI P0 (workspace-restoration)	3m 57s
Playwright critical (${{ matrix.group }})	0s
Validate Nix flake	0s
Docker image build	0s
Windows tools-pack payload tests	0s
Validate workspace	6s
Runtime summary	6s
	38m 31s

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