implement semdex not enabled states

app/transports/http/bindings/datagraph.go

@@ -19,6 +19,7 @@ import (
 	"github.com/Southclaws/storyden/app/resources/profile"
 	"github.com/Southclaws/storyden/app/services/search/searcher"
 	"github.com/Southclaws/storyden/app/services/semdex"
+	"github.com/Southclaws/storyden/app/services/system/instance_info"
 	"github.com/Southclaws/storyden/app/transports/http/openapi"
 )
 
@@ -28,6 +29,7 @@ type Datagraph struct {
 }
 
 func NewDatagraph(
+	info *instance_info.Provider,
 	searcher searcher.Searcher,
 	asker semdex.Asker,
 	router *echo.Echo,
@@ -37,12 +39,23 @@ func NewDatagraph(
 		asker:    asker,
 	}
 
+	ii, err := info.Get(context.Background())
+	if err != nil {
+		panic(err)
+	}
+
+	isEnabled := ii.Capabilities.Has(instance_info.CapabilitySemdex)
+
 	// The generated OpenAPI code does not expose the underlying ResponseWriter
 	// which we need for streaming Q&A responses for that ✨chatgpt✨ effect.
 	router.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			path := c.Path()
 			if path == "/api/datagraph/qna" {
+				if !isEnabled {
+					return echo.NewHTTPError(http.StatusNotImplemented, "Semdex is not enabled")
+				}
+
 				ctx := c.Request().Context()
 
 				query := c.QueryParam("q")

web/src/components/site/Navigation/DesktopCommandBar.tsx

@@ -1,4 +1,5 @@
 import { getServerSession } from "@/auth/server-session";
+import { hasCapability } from "@/lib/settings/capabilities";
 import { getSettings } from "@/lib/settings/settings-server";
 import { cx } from "@/styled-system/css";
 import { HStack } from "@/styled-system/jsx";
@@ -14,11 +15,13 @@ import { getServerSidebarState } from "./NavigationPane/server";
 import { Title } from "./Title";
 
 export async function DesktopCommandBar() {
-  const { title } = await getSettings();
+  const { title, capabilities } = await getSettings();
   const initialSidebarState = await getServerSidebarState();
 
   const session = await getServerSession();
 
+  const isSemdexEnabled = hasCapability("semdex", capabilities);
+
   return (
     <HStack
       className={cx(Floating(), styles["topbar"])}
@@ -30,7 +33,7 @@ export async function DesktopCommandBar() {
       <HStack className={styles["topbar-left"]}>
         <SidebarToggle initialValue={initialSidebarState} />
         <SearchAnchor />
-        <AskAnchor />
+        {isSemdexEnabled && <AskAnchor />}
       </HStack>
 
       <HStack className={styles["topbar-middle"]} justify="space-around">

web/src/screens/ask/AskScreen.tsx

@@ -9,22 +9,19 @@ import { useNodeGet } from "@/api/openapi-client/nodes";
 import { useThreadGet } from "@/api/openapi-client/threads";
 import { DatagraphItemKind } from "@/api/openapi-schema";
 import {
-  DatagraphItemBadge,
-  DatagraphItemCard,
   DatagraphItemNodeCard,
   DatagraphItemPostGenericCard,
 } from "@/components/datagraph/DatagraphItemCard";
-import { Unready } from "@/components/site/Unready";
+import { UnreadyBanner } from "@/components/site/Unready";
 import { Spinner } from "@/components/ui/Spinner";
 import { Button } from "@/components/ui/button";
 import { Heading } from "@/components/ui/heading";
 import { Input } from "@/components/ui/input";
 import { API_ADDRESS, WEB_ADDRESS } from "@/config";
-import { DatagraphKindSchema } from "@/lib/datagraph/schema";
+import { useCapability } from "@/lib/settings/capabilities";
 import { css } from "@/styled-system/css";
-import { Box, CardBox, LStack, styled } from "@/styled-system/jsx";
+import { Box, LStack, styled } from "@/styled-system/jsx";
 import { hstack, lstack } from "@/styled-system/patterns";
-import { deriveError } from "@/utils/error";
 
 type DatagraphRef = {
   id: string;
@@ -37,6 +34,7 @@ export function AskScreen() {
   const [content, setContent] = useState("");
   const [isLoading, setIsLoading] = useState(false);
   const [sources, setSources] = useState<Record<string, DatagraphRef>>({});
+  const isEnabled = useCapability("semdex");
 
   useEffect(() => {
     // Helper to extract SDR references from content
@@ -143,6 +141,12 @@ export function AskScreen() {
 
   const sourceList = values(sources);
 
+  if (!isEnabled) {
+    return (
+      <UnreadyBanner error="Ask mode is not enabled for this installation." />
+    );
+  }
+
   return (
     <LStack>
       <styled.form