feat: add EditorAIPanel component with Chat and Suggestions tabs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/editor-ai/SuggestionsTab.tsx

@@ -0,0 +1,50 @@
+import { Check, X, Clock } from 'lucide-react'
+import type { AISuggestion } from '@/types'
+
+interface SuggestionsTabProps {
+  suggestions: AISuggestion[]
+}
+
+const STATUS_CONFIG = {
+  accepted: { icon: Check, color: 'text-emerald-400', label: 'Accepted' },
+  dismissed: { icon: X, color: 'text-rose-400', label: 'Dismissed' },
+  pending: { icon: Clock, color: 'text-amber-400', label: 'Pending' },
+} as const
+
+export function SuggestionsTab({ suggestions }: SuggestionsTabProps) {
+  if (suggestions.length === 0) {
+    return (
+      <div className="flex flex-1 items-center justify-center text-sm text-muted-foreground p-6">
+        No AI suggestions yet
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex-1 overflow-y-auto px-3 py-3 space-y-2">
+      {suggestions.map((s) => {
+        const config = STATUS_CONFIG[s.status]
+        const StatusIcon = config.icon
+        return (
+          <div key={s.id} className="rounded-lg border border-border bg-[rgba(255,255,255,0.02)] px-3 py-2">
+            <div className="flex items-center justify-between">
+              <span className="font-label text-[0.625rem] uppercase tracking-[0.1em] text-muted-foreground">
+                {s.action_type.replace(/_/g, ' ')}
+              </span>
+              <span className={`flex items-center gap-1 text-xs ${config.color}`}>
+                <StatusIcon className="h-3 w-3" />
+                {config.label}
+              </span>
+            </div>
+            {s.target_node_id && (
+              <p className="mt-1 text-xs text-muted-foreground truncate">Node: {s.target_node_id}</p>
+            )}
+            <p className="mt-0.5 font-label text-[0.625rem] text-[#5a6170]">
+              {new Date(s.created_at).toLocaleDateString()}
+            </p>
+          </div>
+        )
+      })}
+    </div>
+  )
+}