Coverage milestone: 74 angry tests added Lines: 71.92% | Functions: 69.58% | Regions: 71.17% | Instantiations: 50.09% Core domain improvements: - proxy/router.rs: 100% functions, 96% instantiations - config/loader.rs: 92% lines, 88% functions - cert/ca.rs: 82% lines Test files: - tests/unit/proxy/router_test.rs (24) - tests/unit/cert/ca_test.rs (20) - tests/unit/config/loader_test.rs (30) All 190 tests pass. Next: shatter dashboard/mod.rs and ux/proxy.rs per Yegor's EO principles.