feat(admin): exclude health check entries from admin logs

Filter out automated health check log entries (such as `/health`,
`/healthz`, and `/api/v1/health`) from the admin logs view. This
reduces noise in the dashboard caused by frequent container health
pings.

Also added corresponding unit tests to verify the filtering behavior.

backend/libs/handlers/accounts_test.go

@@ -1038,6 +1038,7 @@ func TestAdminLogsAndBansPagesRender(t *testing.T) {
 	lines := strings.Join([]string{
 		`{"date":"2026-05-31","time":"12:34:56","source":"user-upload","severity":"user_activity","code":2001,"log":"upload response sent","ip":"127.0.0.1","box_id":"box123"}`,
 		`{"date":"2026-05-31","time":"12:35:56","source":"http","severity":"dev","code":200,"log":"http request","remote_addr":"172.30.0.1:48358","box_id":"box456"}`,
+		`{"date":"2026-05-31","time":"12:36:56","source":"http","severity":"dev","code":200,"log":"http request","method":"GET","path":"/health","ip":"127.0.0.1","user_agent":"Wget"}`,
 		"",
 	}, "\n")
 	if err := os.WriteFile(logPath, []byte(lines), 0o644); err != nil {
@@ -1058,6 +1059,16 @@ func TestAdminLogsAndBansPagesRender(t *testing.T) {
 	if strings.Contains(logsBody, "172.30.0.1:48358") {
 		t.Fatalf("AdminLogs rendered remote address with port: %s", logsBody)
 	}
+	healthRequest := httptest.NewRequest(http.MethodGet, "/admin/logs", nil)
+	healthRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	healthResponse := httptest.NewRecorder()
+	app.AdminLogs(healthResponse, healthRequest)
+	if healthResponse.Code != http.StatusOK {
+		t.Fatalf("AdminLogs health status = %d, body = %s", healthResponse.Code, healthResponse.Body.String())
+	}
+	if strings.Contains(healthResponse.Body.String(), "/health") || strings.Contains(healthResponse.Body.String(), "Wget") {
+		t.Fatalf("AdminLogs rendered container health ping: %s", healthResponse.Body.String())
+	}
 
 	bansRequest := httptest.NewRequest(http.MethodGet, "/admin/bans", nil)
 	bansRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})

backend/libs/handlers/admin.go

@@ -1731,11 +1731,29 @@ func readLogEntries(file string) ([]adminLogEntry, error) {
 		if err := json.Unmarshal(line, &raw); err != nil {
 			continue
 		}
+		if isHealthCheckLogEntry(raw) {
+			continue
+		}
 		entries = append(entries, logEntryFromMap(raw))
 	}
 	return entries, scanner.Err()
 }
 
+func isHealthCheckLogEntry(raw map[string]any) bool {
+	path := strings.TrimSpace(firstLogString(raw, "path", "route"))
+	if path == "" {
+		return false
+	}
+	fields := strings.Fields(path)
+	if len(fields) > 0 {
+		path = fields[len(fields)-1]
+	}
+	if idx := strings.IndexByte(path, '?'); idx >= 0 {
+		path = path[:idx]
+	}
+	return path == "/health" || path == "/healthz" || path == "/api/v1/health"
+}
+
 func logEntryFromMap(raw map[string]any) adminLogEntry {
 	entry := adminLogEntry{
 		Date:     logString(raw, "date"),