feat(kinds): add search box to KINDS command

Add a search input to KindsViewer matching the style from NipsViewer.
Users can now filter kinds by number, name, or description. Supports
autofocus on mount, clear button, and Escape to clear.

src/components/KindsViewer.tsx

@@ -1,6 +1,10 @@
+import { useState, useRef, useEffect } from "react";
+import { Search, X } from "lucide-react";
 import { getKindInfo } from "@/constants/kinds";
 import { kindRenderers } from "./nostr/kinds";
 import { NIPBadge } from "./NIPBadge";
+import { Input } from "@/components/ui/input";
+import { Button } from "@/components/ui/button";
 import { CenteredContent } from "./ui/CenteredContent";
 
 // Dynamically derive supported kinds from renderer registry
@@ -11,62 +15,135 @@ const SUPPORTED_KINDS = Object.keys(kindRenderers).map(Number);
  * Shows all event kinds with rich rendering support
  */
 export default function KindsViewer() {
+  const [search, setSearch] = useState("");
+  const searchInputRef = useRef<HTMLInputElement>(null);
+
+  // Autofocus on mount
+  useEffect(() => {
+    searchInputRef.current?.focus();
+  }, []);
+
   // Sort kinds in ascending order
   const sortedKinds = [...SUPPORTED_KINDS].sort((a, b) => a - b);
 
+  // Filter kinds by search term (matches kind number or name)
+  const filteredKinds = search
+    ? sortedKinds.filter((kind) => {
+        const kindInfo = getKindInfo(kind);
+        const name = kindInfo?.name || "";
+        const description = kindInfo?.description || "";
+        const searchLower = search.toLowerCase();
+        return (
+          kind.toString().includes(search) ||
+          name.toLowerCase().includes(searchLower) ||
+          description.toLowerCase().includes(searchLower)
+        );
+      })
+    : sortedKinds;
+
+  // Clear search
+  const handleClear = () => {
+    setSearch("");
+    searchInputRef.current?.focus();
+  };
+
+  // Handle keyboard shortcuts
+  const handleKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
+    if (e.key === "Escape") {
+      handleClear();
+    }
+  };
+
   return (
     <CenteredContent>
       {/* Header */}
       <div>
         <h1 className="text-2xl font-bold mb-2">
-          Supported Event Kinds ({sortedKinds.length})
+          {search
+            ? `Showing ${filteredKinds.length} of ${sortedKinds.length} Kinds`
+            : `Supported Event Kinds (${sortedKinds.length})`}
         </h1>
-        <p className="text-sm text-muted-foreground">
+        <p className="text-sm text-muted-foreground mb-4">
           Event kinds with rich rendering support in Grimoire. Default kinds
           display raw content only.
         </p>
+
+        {/* Search Input */}
+        <div className="relative">
+          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground pointer-events-none" />
+          <Input
+            ref={searchInputRef}
+            type="text"
+            placeholder="Search kinds by number or name..."
+            value={search}
+            onChange={(e) => setSearch(e.target.value)}
+            onKeyDown={handleKeyDown}
+            className="pl-9 pr-9"
+          />
+          {search && (
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={handleClear}
+              className="absolute right-1 top-1/2 -translate-y-1/2 h-7 w-7 p-0 hover:bg-muted"
+              aria-label="Clear search"
+            >
+              <X className="h-4 w-4" />
+            </Button>
+          )}
+        </div>
       </div>
 
       {/* Kind List */}
-      <div className="border border-border divide-y divide-border">
-        {sortedKinds.map((kind) => {
-          const kindInfo = getKindInfo(kind);
-          const Icon = kindInfo?.icon;
+      {filteredKinds.length > 0 ? (
+        <div className="border border-border divide-y divide-border">
+          {filteredKinds.map((kind) => {
+            const kindInfo = getKindInfo(kind);
+            const Icon = kindInfo?.icon;
 
-          return (
-            <div key={kind} className="p-4 hover:bg-muted/30 transition-colors">
-              <div className="flex items-start gap-4">
-                {/* Icon */}
-                <div className="w-10 h-10 bg-accent/20 rounded flex items-center justify-center flex-shrink-0">
-                  {Icon ? (
-                    <Icon className="w-5 h-5 text-accent" />
-                  ) : (
-                    <span className="text-xs font-mono text-muted-foreground">
-                      {kind}
-                    </span>
-                  )}
-                </div>
-
-                {/* Content */}
-                <div className="flex-1 min-w-0">
-                  <div className="flex items-baseline gap-2 mb-1">
-                    <code className="text-sm font-mono font-semibold">
-                      {kind}
-                    </code>
-                    <span className="text-sm font-semibold">
-                      {kindInfo?.name || `Kind ${kind}`}
-                    </span>
+            return (
+              <div
+                key={kind}
+                className="p-4 hover:bg-muted/30 transition-colors"
+              >
+                <div className="flex items-start gap-4">
+                  {/* Icon */}
+                  <div className="w-10 h-10 bg-accent/20 rounded flex items-center justify-center flex-shrink-0">
+                    {Icon ? (
+                      <Icon className="w-5 h-5 text-accent" />
+                    ) : (
+                      <span className="text-xs font-mono text-muted-foreground">
+                        {kind}
+                      </span>
+                    )}
+                  </div>
+
+                  {/* Content */}
+                  <div className="flex-1 min-w-0">
+                    <div className="flex items-baseline gap-2 mb-1">
+                      <code className="text-sm font-mono font-semibold">
+                        {kind}
+                      </code>
+                      <span className="text-sm font-semibold">
+                        {kindInfo?.name || `Kind ${kind}`}
+                      </span>
+                    </div>
+                    <p className="text-sm text-muted-foreground mb-2">
+                      {kindInfo?.description || "No description available"}
+                    </p>
+                    {kindInfo?.nip && <NIPBadge nipNumber={kindInfo.nip} />}
                   </div>
-                  <p className="text-sm text-muted-foreground mb-2">
-                    {kindInfo?.description || "No description available"}
-                  </p>
-                  {kindInfo?.nip && <NIPBadge nipNumber={kindInfo.nip} />}
                 </div>
               </div>
-            </div>
-          );
-        })}
-      </div>
+            );
+          })}
+        </div>
+      ) : (
+        <div className="text-center py-12 text-muted-foreground">
+          <p className="text-lg mb-2">No kinds match "{search}"</p>
+          <p className="text-sm">Try searching for a different term</p>
+        </div>
+      )}
     </CenteredContent>
   );
 }