fix(frontend): only owner can access knowledge and edit brain snippet (#3073)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/studio/[brainId]/BrainManagementTabs/BrainManagementTabs.tsx

@@ -1,7 +1,7 @@
 /* eslint-disable max-lines */
 
 import { useRouter } from "next/navigation";
-import { useEffect, useState } from "react";
+import { useState } from "react";
 
 import { Icon } from "@/lib/components/ui/Icon/Icon";
 import { LoaderIcon } from "@/lib/components/ui/LoaderIcon/LoaderIcon";
@@ -22,27 +22,20 @@ export const BrainManagementTabs = (): JSX.Element => {
   const { allKnowledge } = useAddedKnowledge({ brainId: brainId ?? undefined });
   const router = useRouter();
 
-  const { brain, isLoading } = useBrainFetcher({
+  const { isLoading } = useBrainFetcher({
     brainId,
   });
 
-  const knowledgeTabDisabled = (): boolean => {
-    return (
-      !hasEditRights ||
-      (brain?.integration_description?.max_files === 0 &&
-        brain.brain_type !== "doc")
-    );
-  };
-
   const brainManagementTabs: Tab[] = [
     {
-      label: `Knowledge${allKnowledge.length > 1 ? "s" : ""} (${
-        allKnowledge.length
-      })`,
+      label: hasEditRights
+        ? `Knowledge${allKnowledge.length > 1 ? "s" : ""} (${
+            allKnowledge.length
+          })`
+        : "Knowledge",
       isSelected: selectedTab === "Knowledge",
       onClick: () => setSelectedTab("Knowledge"),
       iconName: "file",
-      disabled: knowledgeTabDisabled(),
     },
     {
       label: "Settings",
@@ -59,10 +52,6 @@ export const BrainManagementTabs = (): JSX.Element => {
     },
   ];
 
-  useEffect(() => {
-    brainManagementTabs[2].disabled = knowledgeTabDisabled();
-  }, [hasEditRights]);
-
   if (!brainId) {
     return <div />;
   }
@@ -89,7 +78,9 @@ export const BrainManagementTabs = (): JSX.Element => {
           <Tabs tabList={brainManagementTabs} />
         </div>
       </div>
-      {selectedTab === "Settings" && <SettingsTab brainId={brainId} />}
+      {selectedTab === "Settings" && (
+        <SettingsTab brainId={brainId} hasEditRights={hasEditRights} />
+      )}
       {selectedTab === "People" && <PeopleTab brainId={brainId} />}
       {selectedTab === "Knowledge" && (
         <KnowledgeTab

frontend/app/studio/[brainId]/BrainManagementTabs/components/KnowledgeTab/KnowledgeTab.tsx

@@ -20,12 +20,26 @@ type KnowledgeTabProps = {
 export const KnowledgeTab = ({
   brainId,
   allKnowledge,
+  hasEditRights,
 }: KnowledgeTabProps): JSX.Element => {
   const { isPending } = useAddedKnowledge({
     brainId,
   });
   const { setShouldDisplayFeedCard } = useKnowledgeToFeedContext();
 
+  if (hasEditRights) {
+    return (
+      <div className={styles.knowledge_tab_container}>
+        <div className={styles.knowledge_tab_wrapper}>
+          <MessageInfoBox type="warning">
+            You don&apos;t have permission to access the knowledge in this
+            brain.
+          </MessageInfoBox>
+        </div>
+      </div>
+    );
+  }
+
   if (isPending) {
     return <LoaderIcon size="big" color="accent" />;
   }

frontend/app/studio/[brainId]/BrainManagementTabs/components/SettingsTab/SettingsTab.module.scss

@@ -61,7 +61,6 @@
           display: flex;
           justify-content: center;
           align-items: center;
-          cursor: pointer;
           font-size: Typography.$very_large;
         }
 
@@ -72,6 +71,12 @@
           font-size: Typography.$small;
           gap: Spacings.$spacing03;
         }
+
+        &.clickable {
+          .brain_snippet {
+            cursor: pointer;
+          }
+        }
       }
 
       .general_information {

frontend/app/studio/[brainId]/BrainManagementTabs/components/SettingsTab/SettingsTab.tsx

@@ -14,7 +14,6 @@ import { GeneralInformation } from "./components/GeneralInformation/GeneralInfor
 import { ModelSelection } from "./components/ModelSelection/ModelSelection";
 import { Prompt } from "./components/Prompt/Prompt";
 import { useBrainFormState } from "./hooks/useBrainFormState";
-import { usePermissionsController } from "./hooks/usePermissionsController";
 import { UsePromptProps } from "./hooks/usePrompt";
 import { useSettingsTab } from "./hooks/useSettingsTab";
 
@@ -22,20 +21,18 @@ import { useBrainFetcher } from "../../hooks/useBrainFetcher";
 
 type SettingsTabProps = {
   brainId: UUID;
+  hasEditRights: boolean;
 };
 
 export const SettingsTabContent = ({
   brainId,
+  hasEditRights,
 }: SettingsTabProps): JSX.Element => {
   const { t } = useTranslation(["translation", "brain", "config"]);
   const [editSnippet, setEditSnippet] = useState<boolean>(false);
   const [snippetColor, setSnippetColor] = useState<string>("");
   const [snippetEmoji, setSnippetEmoji] = useState<string>("");
 
-  const { hasEditRights } = usePermissionsController({
-    brainId,
-  });
-
   const { brain } = useBrainFetcher({
     brainId,
   });
@@ -81,7 +78,11 @@ export const SettingsTabContent = ({
             <div className={styles.inputs_wrapper}>
               <div className={styles.brain_snippet_wrapper}>
                 {editSnippet && (
-                  <div className={styles.edit_snippet}>
+                  <div
+                    className={`${styles.edit_snippet} ${
+                      hasEditRights ? styles.clickable : ""
+                    }`}
+                  >
                     <BrainSnippet
                       setVisible={setEditSnippet}
                       initialColor={brain.snippet_color}
@@ -98,26 +99,27 @@ export const SettingsTabContent = ({
                   className={styles.brain_snippet}
                   style={{ backgroundColor: snippetColor }}
                   onClick={() => {
-                    if (!editSnippet) {
+                    if (!editSnippet && hasEditRights) {
                       setEditSnippet(true);
                     }
                   }}
                 >
                   <span>{snippetEmoji}</span>
                 </div>
-                <QuivrButton
-                  label="Edit"
-                  iconName="edit"
-                  color="primary"
-                  onClick={() => setEditSnippet(true)}
-                  small={true}
-                />
+                {hasEditRights && (
+                  <QuivrButton
+                    label="Edit"
+                    iconName="edit"
+                    color="primary"
+                    onClick={() => setEditSnippet(true)}
+                    small={true}
+                  />
+                )}
               </div>
               <div className={styles.general_information}>
                 <GeneralInformation hasEditRights={hasEditRights} />
               </div>
-              {(!!brain.integration_description?.allow_model_change ||
-                brain.brain_type === "doc") && (
+              {brain.brain_type === "doc" && (
                 <div className={styles.model_information}>
                   <ModelSelection
                     accessibleModels={accessibleModels}
@@ -164,12 +166,15 @@ export const SettingsTabContent = ({
   );
 };
 
-export const SettingsTab = ({ brainId }: SettingsTabProps): JSX.Element => {
+export const SettingsTab = ({
+  brainId,
+  hasEditRights,
+}: SettingsTabProps): JSX.Element => {
   const methods = useForm<Brain>();
 
   return (
     <FormProvider {...methods}>
-      <SettingsTabContent brainId={brainId} />
+      <SettingsTabContent brainId={brainId} hasEditRights={hasEditRights} />
     </FormProvider>
   );
 };