diff --git a/src/ui/api/alerts-api.test.ts b/src/ui/api/alerts-api.test.ts
new file mode 100644
index 00000000..cb04d4b8
--- /dev/null
+++ b/src/ui/api/alerts-api.test.ts
@@ -0,0 +1,45 @@
+import { describe, expect, it } from "vitest";
+import { mapAlertFiring } from "./alerts-api";
+
+describe("mapAlertFiring", () => {
+  it("normalizes sqlite snake_case rows for the alerts UI", () => {
+    expect(
+      mapAlertFiring({
+        id: 9,
+        user_id: "u1",
+        rule_id: 4,
+        host_id: 12,
+        host_name: "db-01",
+        fired_at: "2026-06-30 12:00:00",
+        resolved_at: null,
+        value: 91,
+        message: "CPU threshold exceeded",
+        severity: "critical",
+        acknowledged: 0,
+        rule_name: "CPU",
+      }),
+    ).toEqual({
+      id: 9,
+      userId: "u1",
+      ruleId: 4,
+      hostId: 12,
+      hostName: "db-01",
+      firedAt: "2026-06-30 12:00:00",
+      resolvedAt: null,
+      value: 91,
+      message: "CPU threshold exceeded",
+      severity: "critical",
+      acknowledged: false,
+      ruleName: "CPU",
+    });
+  });
+
+  it("uses safe defaults for malformed rows", () => {
+    const firing = mapAlertFiring({ acknowledged: 1, severity: "bad" });
+
+    expect(firing.id).toBe(0);
+    expect(firing.hostName).toBe("");
+    expect(firing.severity).toBe("warning");
+    expect(firing.acknowledged).toBe(true);
+  });
+});
diff --git a/src/ui/api/alerts-api.ts b/src/ui/api/alerts-api.ts
index 82cb342c..2b1ef500 100644
--- a/src/ui/api/alerts-api.ts
+++ b/src/ui/api/alerts-api.ts
@@ -40,6 +40,28 @@ export interface AlertFiring {
   ruleName?: string;
 }
 
+function stringValue(value: unknown, fallback = ""): string {
+  return typeof value === "string" ? value : fallback;
+}
+
+function numberValue(value: unknown, fallback = 0): number {
+  return typeof value === "number" && Number.isFinite(value) ? value : fallback;
+}
+
+function nullableNumberValue(value: unknown): number | null {
+  return typeof value === "number" && Number.isFinite(value) ? value : null;
+}
+
+function boolValue(value: unknown): boolean {
+  return value === true || value === 1 || value === "1";
+}
+
+function severityValue(value: unknown): AlertFiring["severity"] {
+  return value === "info" || value === "critical" || value === "warning"
+    ? value
+    : "warning";
+}
+
 export async function getNotificationChannels(): Promise<
   NotificationChannel[]
 > {
@@ -91,6 +113,23 @@ function mapRule(r: Record<string, unknown>): AlertRule {
   };
 }
 
+export function mapAlertFiring(r: Record<string, unknown>): AlertFiring {
+  return {
+    id: numberValue(r.id),
+    userId: stringValue(r.userId ?? r.user_id),
+    ruleId: numberValue(r.ruleId ?? r.rule_id),
+    hostId: numberValue(r.hostId ?? r.host_id),
+    hostName: stringValue(r.hostName ?? r.host_name),
+    firedAt: stringValue(r.firedAt ?? r.fired_at, new Date(0).toISOString()),
+    resolvedAt: stringValue(r.resolvedAt ?? r.resolved_at) || null,
+    value: nullableNumberValue(r.value),
+    message: stringValue(r.message),
+    severity: severityValue(r.severity),
+    acknowledged: boolValue(r.acknowledged),
+    ruleName: stringValue(r.ruleName ?? r.rule_name) || undefined,
+  };
+}
+
 export async function getAlertRules(): Promise<AlertRule[]> {
   const res = await rbacApi.get("/alert-rules");
   return (res.data as Record<string, unknown>[]).map(mapRule);
@@ -121,7 +160,13 @@ export async function getAlertFirings(opts?: {
   acknowledged?: boolean;
 }): Promise<AlertFiring[]> {
   const res = await rbacApi.get("/alert-firings", { params: opts });
-  return (res.data as { firings: AlertFiring[] }).firings ?? res.data;
+  const data = res.data as { firings?: unknown } | unknown[];
+  const rows = Array.isArray(data)
+    ? data
+    : Array.isArray(data.firings)
+      ? data.firings
+      : [];
+  return rows.map((row) => mapAlertFiring(row as Record<string, unknown>));
 }
 
 export async function acknowledgeAlertFiring(id: number): Promise<void> {
diff --git a/src/ui/api/audit-log-api.test.ts b/src/ui/api/audit-log-api.test.ts
new file mode 100644
index 00000000..953baec2
--- /dev/null
+++ b/src/ui/api/audit-log-api.test.ts
@@ -0,0 +1,47 @@
+import { describe, expect, it } from "vitest";
+import { mapAuditLog } from "./audit-log-api";
+
+describe("mapAuditLog", () => {
+  it("normalizes sqlite snake_case rows for the audit log UI", () => {
+    expect(
+      mapAuditLog({
+        id: 3,
+        user_id: "u1",
+        username: "admin",
+        action: "host_create",
+        resource_type: "host",
+        resource_id: "42",
+        resource_name: "prod",
+        details: "created",
+        ip_address: "127.0.0.1",
+        user_agent: "browser",
+        success: 1,
+        error_message: null,
+        timestamp: "2026-06-30 12:00:00",
+      }),
+    ).toEqual({
+      id: 3,
+      userId: "u1",
+      username: "admin",
+      action: "host_create",
+      resourceType: "host",
+      resourceId: "42",
+      resourceName: "prod",
+      details: "created",
+      ipAddress: "127.0.0.1",
+      userAgent: "browser",
+      success: true,
+      errorMessage: null,
+      timestamp: "2026-06-30 12:00:00",
+    });
+  });
+
+  it("uses render-safe defaults for malformed rows", () => {
+    const log = mapAuditLog({ success: 0 });
+
+    expect(log.id).toBe(0);
+    expect(log.action).toBe("unknown");
+    expect(log.resourceType).toBe("unknown");
+    expect(log.success).toBe(false);
+  });
+});
diff --git a/src/ui/api/audit-log-api.ts b/src/ui/api/audit-log-api.ts
index a9d3b88d..a22c48d1 100644
--- a/src/ui/api/audit-log-api.ts
+++ b/src/ui/api/audit-log-api.ts
@@ -34,6 +34,40 @@ export interface AuditLogResponse {
   totalPages: number;
 }
 
+function stringValue(value: unknown, fallback = ""): string {
+  return typeof value === "string" ? value : fallback;
+}
+
+function numberValue(value: unknown, fallback = 0): number {
+  return typeof value === "number" && Number.isFinite(value) ? value : fallback;
+}
+
+function nullableStringValue(value: unknown): string | null {
+  return typeof value === "string" && value ? value : null;
+}
+
+function boolValue(value: unknown): boolean {
+  return value === true || value === 1 || value === "1";
+}
+
+export function mapAuditLog(row: Record<string, unknown>): AuditLog {
+  return {
+    id: numberValue(row.id),
+    userId: stringValue(row.userId ?? row.user_id),
+    username: stringValue(row.username),
+    action: stringValue(row.action, "unknown"),
+    resourceType: stringValue(row.resourceType ?? row.resource_type, "unknown"),
+    resourceId: nullableStringValue(row.resourceId ?? row.resource_id),
+    resourceName: nullableStringValue(row.resourceName ?? row.resource_name),
+    details: nullableStringValue(row.details),
+    ipAddress: nullableStringValue(row.ipAddress ?? row.ip_address),
+    userAgent: nullableStringValue(row.userAgent ?? row.user_agent),
+    success: boolValue(row.success),
+    errorMessage: nullableStringValue(row.errorMessage ?? row.error_message),
+    timestamp: stringValue(row.timestamp, new Date(0).toISOString()),
+  };
+}
+
 export async function getAuditLogs(
   filters: AuditLogFilters = {},
 ): Promise<AuditLogResponse> {
@@ -50,7 +84,14 @@ export async function getAuditLogs(
     if (filters.endDate) params.set("endDate", filters.endDate);
 
     const response = await authApi.get(`/audit-logs?${params.toString()}`);
-    return response.data;
+    const data = response.data as Partial<AuditLogResponse>;
+    const rows = Array.isArray(data.logs) ? data.logs : [];
+    return {
+      logs: rows.map((row) => mapAuditLog(row as Record<string, unknown>)),
+      total: numberValue(data.total),
+      page: numberValue(data.page, filters.page ?? 1),
+      totalPages: numberValue(data.totalPages, 1),
+    };
   } catch (error) {
     handleApiError(error, "fetch audit logs");
   }
diff --git a/src/ui/sidebar/AdminAuditLogSection.tsx b/src/ui/sidebar/AdminAuditLogSection.tsx
index cde60d7e..85fa2900 100644
--- a/src/ui/sidebar/AdminAuditLogSection.tsx
+++ b/src/ui/sidebar/AdminAuditLogSection.tsx
@@ -101,7 +101,7 @@ export function AdminAuditLogSection({
       .catch(() => {});
     fetchLogs(buildFilters(), 1);
     setPage(1);
-  }, [open]);
+  }, [open, buildFilters, fetchLogs]);
 
   useEffect(() => {
     if (!open) return;
@@ -114,6 +114,9 @@ export function AdminAuditLogSection({
       if (debounceRef.current) clearTimeout(debounceRef.current);
     };
   }, [
+    open,
+    buildFilters,
+    fetchLogs,
     filterUserId,
     filterAction,
     filterResourceType,
@@ -179,7 +182,7 @@ export function AdminAuditLogSection({
               onChange={(e) => setFilterUserId(e.target.value)}
             >
               <option value="">{t("admin.auditLogFilterAll")}</option>
-              {users.map((u) => (
+              {(Array.isArray(users) ? users : []).map((u) => (
                 <option key={u.id} value={u.id}>
                   {u.username}
                 </option>
@@ -318,7 +321,7 @@ export function AdminAuditLogSection({
                   <div className="flex flex-col gap-0.5 min-w-0 flex-1">
                     <div className="flex items-center gap-1.5 flex-wrap">
                       <span className="text-[10px] font-semibold text-foreground">
-                        {log.action.replace(/_/g, " ")}
+                        {(log.action || "unknown").replace(/_/g, " ")}
                       </span>
                       <span className="text-[9px] px-1 py-px border border-border text-muted-foreground">
                         {log.resourceType}
diff --git a/src/ui/sidebar/AlertsPanel.tsx b/src/ui/sidebar/AlertsPanel.tsx
index 24d42f02..4c4b77fa 100644
--- a/src/ui/sidebar/AlertsPanel.tsx
+++ b/src/ui/sidebar/AlertsPanel.tsx
@@ -37,6 +37,7 @@ const SEVERITY_CLASS: Record<string, string> = {
 
 function timeAgo(isoStr: string): string {
   const ms = Date.now() - new Date(isoStr).getTime();
+  if (!Number.isFinite(ms)) return "";
   const sec = Math.floor(ms / 1000);
   if (sec < 60) return `${sec}s ago`;
   const min = Math.floor(sec / 60);
@@ -321,7 +322,7 @@ export function AlertsPanel() {
                       {rule.name}
                     </div>
                     <div className="text-[10px] text-muted-foreground">
-                      {rule.triggerType.replace(/_/g, " ")}
+                      {(rule.triggerType || "").replace(/_/g, " ")}
                     </div>
                   </div>
                   <div