fix: resolve all frontend lint errors for unused imports and type issues

- Remove unused type imports: SnapshotAlertConfig, PMGThresholdDefaults, RawOverrideConfig, BackupAlertConfig
- Remove unused imports: Settings, Power, JSX, onMount, createEffect
- Remove unused function _getUnitSuffix
- Fix GuestDefaults type to avoid index signature conflict
- Prefix unused catch variables with underscore
- Fix StickyNote title prop by wrapping in span element

frontend-modern/src/components/AI/AIChat.tsx

@@ -253,7 +253,7 @@ export const AIChat: Component<AIChatProps> = (props) => {
       await AIAPI.updateSettings({ autonomous_mode: newValue });
       setAutonomousMode(newValue);
       notificationStore.success(newValue ? 'Autonomous mode enabled' : 'Autonomous mode disabled');
-    } catch (e) {
+    } catch (_e) {
       notificationStore.error('Failed to toggle autonomous mode');
     } finally {
       setIsTogglingAutonomous(false);

frontend-modern/src/components/Alerts/Thresholds/components/GlobalDefaultsRow.tsx

@@ -5,7 +5,7 @@
  * Shows at the top of each section with editable threshold badges.
  */
 
-import { Component, Show, For, createSignal, createEffect, createMemo } from 'solid-js';
+import { Component, Show, For, createSignal, createMemo } from 'solid-js';
 import Settings from 'lucide-solid/icons/settings';
 import RotateCcw from 'lucide-solid/icons/rotate-ccw';
 import Check from 'lucide-solid/icons/check';

frontend-modern/src/components/Alerts/Thresholds/components/ResourceCard.tsx

@@ -5,7 +5,7 @@
  * Replaces wide table rows with a compact, mobile-friendly design.
  */
 
-import { Component, Show, For, createSignal, createMemo, JSX } from 'solid-js';
+import { Component, Show, For, createSignal, createMemo } from 'solid-js';
 import ChevronDown from 'lucide-solid/icons/chevron-down';
 import ChevronUp from 'lucide-solid/icons/chevron-up';
 import Settings from 'lucide-solid/icons/settings';
@@ -14,7 +14,7 @@ import Check from 'lucide-solid/icons/check';
 import X from 'lucide-solid/icons/x';
 import Bell from 'lucide-solid/icons/bell';
 import BellOff from 'lucide-solid/icons/bell-off';
-import Power from 'lucide-solid/icons/power';
+
 import ExternalLink from 'lucide-solid/icons/external-link';
 import StickyNote from 'lucide-solid/icons/sticky-note';
 import { ThresholdBadge, ThresholdBadgeGroup } from './ThresholdBadge';
@@ -189,7 +189,9 @@ export const ResourceCard: Component<ResourceCardProps> = (props) => {
 
                             {/* Has note indicator */}
                             <Show when={props.resource.note}>
-                                <StickyNote class="w-3.5 h-3.5 text-yellow-500" title={props.resource.note} />
+                                <span title={props.resource.note}>
+                                    <StickyNote class="w-3.5 h-3.5 text-yellow-500" />
+                                </span>
                             </Show>
 
                             {/* Disabled badge */}

frontend-modern/src/components/Alerts/Thresholds/components/ThresholdBadge.tsx

@@ -69,15 +69,6 @@ const formatDisplayValue = (metric: string, value: number | undefined): string =
     return String(value);
 };
 
-/**
- * Get the unit suffix for a metric
- */
-const getUnitSuffix = (metric: string): string => {
-    if (['cpu', 'memory', 'disk', 'usage'].includes(metric)) return '%';
-    if (metric === 'temperature') return '°C';
-    if (['diskRead', 'diskWrite', 'networkIn', 'networkOut'].includes(metric)) return ' MB/s';
-    return '';
-};
 
 /**
  * Get readable label for a metric

frontend-modern/src/components/Alerts/Thresholds/hooks/useCollapsedSections.ts

@@ -5,7 +5,7 @@
  * Provides a clean interface for toggling sections and remembering user preferences.
  */
 
-import { createSignal, createEffect, onMount } from 'solid-js';
+import { createSignal, createEffect } from 'solid-js';
 
 const STORAGE_KEY = 'pulse-thresholds-collapsed-sections';
 

frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx

@@ -8,7 +8,7 @@
 import { Component, Show, createSignal, createEffect, JSX } from 'solid-js';
 import ChevronRight from 'lucide-solid/icons/chevron-right';
 import ChevronDown from 'lucide-solid/icons/chevron-down';
-import Settings from 'lucide-solid/icons/settings';
+
 
 export interface CollapsibleSectionProps {
     /** Unique identifier for the section */

frontend-modern/src/components/Alerts/Thresholds/types.ts

@@ -6,7 +6,7 @@
  */
 
 import type { Alert } from '@/types/api';
-import type { RawOverrideConfig, PMGThresholdDefaults, SnapshotAlertConfig, BackupAlertConfig } from '@/types/alerts';
+// Alert types imported from shared alert types
 
 // ============================================================================
 // Resource Types
@@ -182,7 +182,16 @@ export interface EditingActions {
 /**
  * Default threshold configuration for guests
  */
-export interface GuestDefaults extends ThresholdValues {
+export interface GuestDefaults {
+    cpu?: number;
+    memory?: number;
+    disk?: number;
+    diskRead?: number;
+    diskWrite?: number;
+    networkIn?: number;
+    networkOut?: number;
+    temperature?: number;
+    usage?: number;
     disableConnectivity?: boolean;
     poweredOffSeverity?: 'warning' | 'critical';
 }