Add SSO login support

- Add [sso] config section with redirect_uri
- Create mcdsl/sso client when SSO is configured
- Add /login (landing page), /sso/redirect, /sso/callback routes
- Add /logout route
- Update login template with SSO landing page variant
- Bump mcdsl to v1.6.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vendor/modernc.org/libc/netinet/in/capi_darwin_amd64.go

@@ -0,0 +1,11 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_darwin_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{
+	"__darwin_check_fd_set":          {},
+	"__darwin_check_fd_set_overflow": {},
+	"__darwin_fd_clr":                {},
+	"__darwin_fd_isset":              {},
+	"__darwin_fd_set":                {},
+}

vendor/modernc.org/libc/netinet/in/capi_darwin_arm64.go

@@ -0,0 +1,11 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_darwin_arm64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{
+	"__darwin_check_fd_set":          {},
+	"__darwin_check_fd_set_overflow": {},
+	"__darwin_fd_clr":                {},
+	"__darwin_fd_isset":              {},
+	"__darwin_fd_set":                {},
+}

vendor/modernc.org/libc/netinet/in/capi_freebsd_386.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_freebsd_386.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_freebsd_amd64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_freebsd_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_freebsd_arm.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_freebsd_arm.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_freebsd_arm64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_freebsd_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_illumos_amd64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_illumos_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_386.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o netinet/in/in_linux_386.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_amd64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_linux_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_arm.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o netinet/in/in_linux_arm.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_arm64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o netinet/in/in_linux_arm64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_loong64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_linux_loong64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_mips64le.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_linux_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_ppc64le.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_linux_ppc64le.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_riscv64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o netinet/in/in_linux_riscv64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_linux_s390x.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o netinet/in/in_linux_s390x.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_netbsd_amd64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_netbsd_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_netbsd_arm.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_netbsd_arm.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_openbsd_386.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_openbsd_386.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_openbsd_amd64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_openbsd_amd64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}

vendor/modernc.org/libc/netinet/in/capi_openbsd_arm64.go

@@ -0,0 +1,5 @@
+// Code generated by 'ccgo netinet/in/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -ignore-unsupported-alignment -o netinet/in/in_openbsd_arm64.go -pkgname in', DO NOT EDIT.
+
+package in
+
+var CAPI = map[string]struct{}{}