test(desktop): cover deepseek account name extraction for wechat + phone logins

Refactor readDeepseekAccountIdentity so the JSON payload parser is a pure
ts function (extractDeepseekIdentityFromPayload). The webContents IIFE now
just polls for userToken and returns the raw API JSON; payload picking lives
in ts and is unit-tested.

Tests lock the contract for both login types we observed in the wild:
  - WeChat-bound account: id_profile.name = '阿白', picture present.
  - Phone-only login: id_profile = null, mobile_number = '177******08',
    email = '' (empty string, not null) — the case that originally regressed.

Plus regressions for the priority order (profile.name > mobile_number > email),
the all-empty fallback, and non-record payloads.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/internal/tenant/app/monitoring_service_date_test.go

@@ -132,6 +132,27 @@ func TestReconcileEnabledMonitoringPlatformsKeepsAuthorizedSubset(t *testing.T)
 	assert.Empty(t, resolveMonitoringPlatforms(nil))
 }
 
+func TestFilterMonitoringPlatformsByIDSetKeepsCatalogOrder(t *testing.T) {
+	platforms := defaultMonitoringPlatformMetadata()
+
+	filtered := filterMonitoringPlatformsByIDSet(platforms, []string{"qwen", "yuanbao"})
+
+	assert.Equal(t, []string{"yuanbao", "qwen"}, monitoringPlatformIDs(filtered))
+}
+
+func TestCollectNowDispatchTargetClientIDsDeduplicatesByPlatformOrder(t *testing.T) {
+	sharedClientID := mustParseDailyMonitoringUUID(t, "00000000-0000-0000-0000-000000000501")
+	qwenClientID := mustParseDailyMonitoringUUID(t, "00000000-0000-0000-0000-000000000502")
+
+	targets := collectNowDispatchTargetClientIDs(map[string]uuid.UUID{
+		"yuanbao": sharedClientID,
+		"qwen":    qwenClientID,
+		"doubao":  sharedClientID,
+	}, &sharedClientID)
+
+	assert.Equal(t, []uuid.UUID{sharedClientID, qwenClientID}, targets)
+}
+
 func TestMonitoringPlatformAuthorizationStatus(t *testing.T) {
 	clientID := uuid.New()