Initial commit: smartrun MVP

Garmin run classification and progression tracker. Go backend (MCP
client to mcp-garmin, SQLite store, deterministic rule engine, REST
API) and React/TS frontend (Dashboard, Review Queue, Workout Kinds).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/internal/garmin/client_test.go

@@ -0,0 +1,22 @@
+package garmin
+
+import "testing"
+
+func TestParseAuthResult(t *testing.T) {
+	cases := []struct {
+		msg  string
+		want AuthStatus
+	}{
+		{"Authenticated successfully.", AuthSuccess},
+		{"MFA accepted. Authenticated successfully.", AuthSuccess},
+		{"MFA required. Garmin has sent a verification code...", AuthMFARequired},
+		{"Authentication failed: 401 Unauthorized (Invalid Username or Password)", AuthFailed},
+		{"Authentication failed after MFA: bad code", AuthFailed},
+	}
+	for _, c := range cases {
+		got := parseAuthResult(c.msg)
+		if got.Status != c.want {
+			t.Errorf("parseAuthResult(%q).Status = %v, want %v", c.msg, got.Status, c.want)
+		}
+	}
+}