Ergaenze HTTP-Tests fuer Basisendpunkte

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

server/backend/internal/httpapi/router_test.go

@@ -0,0 +1,130 @@
+package httpapi
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestRouterHealthz(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "/healthz", nil)
+	w := httptest.NewRecorder()
+
+	NewRouter().ServeHTTP(w, req)
+
+	if got, want := w.Code, http.StatusOK; got != want {
+		t.Fatalf("status = %d, want %d", got, want)
+	}
+
+	var response struct {
+		Service string `json:"service"`
+		Status  string `json:"status"`
+	}
+
+	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
+		t.Fatalf("Unmarshal() error = %v", err)
+	}
+
+	if got, want := response.Service, "morz-infoboard-backend"; got != want {
+		t.Fatalf("service = %q, want %q", got, want)
+	}
+
+	if got, want := response.Status, "ok"; got != want {
+		t.Fatalf("status field = %q, want %q", got, want)
+	}
+}
+
+func TestRouterBaseAPI(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "/api/v1", nil)
+	w := httptest.NewRecorder()
+
+	NewRouter().ServeHTTP(w, req)
+
+	if got, want := w.Code, http.StatusOK; got != want {
+		t.Fatalf("status = %d, want %d", got, want)
+	}
+
+	var response struct {
+		Name    string   `json:"name"`
+		Version string   `json:"version"`
+		Tools   []string `json:"tools"`
+	}
+
+	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
+		t.Fatalf("Unmarshal() error = %v", err)
+	}
+
+	if got, want := response.Name, "morz-infoboard-backend"; got != want {
+		t.Fatalf("name = %q, want %q", got, want)
+	}
+
+	if got, want := response.Version, "dev"; got != want {
+		t.Fatalf("version = %q, want %q", got, want)
+	}
+
+	if got, want := len(response.Tools), 1; got != want {
+		t.Fatalf("len(tools) = %d, want %d", got, want)
+	}
+
+	if got, want := response.Tools[0], "message-wall-resolve"; got != want {
+		t.Fatalf("tool[0] = %q, want %q", got, want)
+	}
+}
+
+func TestRouterMeta(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/meta", nil)
+	w := httptest.NewRecorder()
+
+	NewRouter().ServeHTTP(w, req)
+
+	if got, want := w.Code, http.StatusOK; got != want {
+		t.Fatalf("status = %d, want %d", got, want)
+	}
+
+	var response struct {
+		Service string `json:"service"`
+		Version string `json:"version"`
+		API     struct {
+			BasePath string `json:"base_path"`
+			Health   string `json:"health"`
+			Tools    []struct {
+				Name   string `json:"name"`
+				Method string `json:"method"`
+				Path   string `json:"path"`
+			} `json:"tools"`
+		} `json:"api"`
+	}
+
+	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
+		t.Fatalf("Unmarshal() error = %v", err)
+	}
+
+	if got, want := response.API.BasePath, "/api/v1"; got != want {
+		t.Fatalf("api.base_path = %q, want %q", got, want)
+	}
+
+	if got, want := response.API.Health, "/healthz"; got != want {
+		t.Fatalf("api.health = %q, want %q", got, want)
+	}
+
+	if got, want := len(response.API.Tools), 1; got != want {
+		t.Fatalf("len(api.tools) = %d, want %d", got, want)
+	}
+
+	if got, want := response.API.Tools[0].Path, "/api/v1/tools/message-wall/resolve"; got != want {
+		t.Fatalf("api.tools[0].path = %q, want %q", got, want)
+	}
+}
+
+func TestRouterPlayerStatusRoute(t *testing.T) {
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/player/status", bytes.NewBufferString(`{"screen_id":"demo","ts":"2026-03-22T16:00:00Z","status":"running"}`))
+	w := httptest.NewRecorder()
+
+	NewRouter().ServeHTTP(w, req)
+
+	if got, want := w.Code, http.StatusOK; got != want {
+		t.Fatalf("status = %d, want %d", got, want)
+	}
+}