feat: add download badge to uninstalled AI tools in tool grid

Show a download icon on AI tools that are not yet installed, and fetch
feature status on mount in both the sidebar tool panel and fullscreen
grid page.

apps/web/src/components/common/tool-card.tsx

@@ -1,8 +1,10 @@
 import type { Tool } from "@ashim/shared";
-import { FileImage, Star } from "lucide-react";
+import { PYTHON_SIDECAR_TOOLS } from "@ashim/shared";
+import { Download, FileImage, Star } from "lucide-react";
 import { Link } from "react-router-dom";
 import { ICON_MAP } from "@/lib/icon-map";
 import { cn } from "@/lib/utils";
+import { useFeaturesStore } from "@/stores/features-store";
 
 interface ToolCardProps {
   tool: Tool;
@@ -12,6 +14,10 @@ export function ToolCard({ tool }: ToolCardProps) {
   const IconComponent =
     (ICON_MAP[tool.icon] as React.ComponentType<{ className?: string }>) ?? FileImage;
 
+  const isAiTool = (PYTHON_SIDECAR_TOOLS as readonly string[]).includes(tool.id);
+  const isInstalled = useFeaturesStore((s) => s.isToolInstalled)(tool.id);
+  const showDownloadBadge = isAiTool && !isInstalled;
+
   return (
     <div className="group flex items-center gap-3 relative">
       <button
@@ -36,6 +42,7 @@ export function ToolCard({ tool }: ToolCardProps) {
             Experimental
           </span>
         )}
+        {showDownloadBadge && <Download className="h-3.5 w-3.5 text-muted-foreground" />}
       </Link>
     </div>
   );

apps/web/src/components/layout/tool-panel.tsx

@@ -1,5 +1,6 @@
 import { CATEGORIES, TOOLS } from "@ashim/shared";
 import { useEffect, useMemo, useState } from "react";
+import { useFeaturesStore } from "@/stores/features-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { SearchBar } from "../common/search-bar";
 import { ToolCard } from "../common/tool-card";
@@ -7,11 +8,16 @@ import { ToolCard } from "../common/tool-card";
 export function ToolPanel() {
   const [search, setSearch] = useState("");
   const { disabledTools, experimentalEnabled, loaded, fetch } = useSettingsStore();
+  const fetchFeatures = useFeaturesStore((s) => s.fetch);
 
   useEffect(() => {
     fetch();
   }, [fetch]);
 
+  useEffect(() => {
+    fetchFeatures();
+  }, [fetchFeatures]);
+
   const visibleTools = useMemo(() => {
     if (!loaded) return [];
     return TOOLS.filter((t) => {

apps/web/src/pages/fullscreen-grid-page.tsx

@@ -7,6 +7,7 @@ import { GemLogo } from "@/components/common/gem-logo";
 import { apiGet } from "@/lib/api";
 import { ICON_MAP } from "@/lib/icon-map";
 import { cn } from "@/lib/utils";
+import { useFeaturesStore } from "@/stores/features-store";
 
 export function FullscreenGridPage() {
   const [search, setSearch] = useState("");
@@ -14,6 +15,11 @@ export function FullscreenGridPage() {
   const navigate = useNavigate();
   const [disabledTools, setDisabledTools] = useState<string[]>([]);
   const [experimentalEnabled, setExperimentalEnabled] = useState(false);
+  const fetchFeatures = useFeaturesStore((s) => s.fetch);
+
+  useEffect(() => {
+    fetchFeatures();
+  }, [fetchFeatures]);
 
   useEffect(() => {
     apiGet<{ settings: Record<string, string> }>("/v1/settings")