feat(amazonq): clean up all sessions storage on profileChanged #2115

## Problem
Profile(a.k.a Q region) change is supposed to clear ALL chat history
(everything happening within mynah UI). Therefore, IDE backend should
also clear session states otherwise wrong telemetry would be published.

UI (mynahUI webview) will be re-initiate on profile changed
https://github.com/aws/aws-toolkit-vscode-staging/blob/feature/q-region-expansion/packages/core/src/amazonq/webview/webView.ts#L40-L47
and plugins backend doesn't yet. This pr aims to cover all Q features to
reset session states on profile changed.

Q features covered in this PR to clean up session states
1. /doc
2. /dev
3. /transform
4. /review
5. /test
6. generic chat

Author: Will-ShaoHua

packages/amazonq/src/app/amazonqScan/chat/controller/controller.ts

@@ -108,6 +108,10 @@ export class ScanController {
                 interactionType: data.vote,
             })
         })
+
+        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
+            this.sessionStorage.removeActiveTab()
+        })
     }
 
     private async tabOpened(message: any) {

packages/core/src/amazonq/commons/baseChatStorage.ts

@@ -35,4 +35,8 @@ export abstract class BaseChatSessionStorage<T extends { isAuthenticating: boole
     public deleteSession(tabID: string) {
         this.sessions.delete(tabID)
     }
+
+    public deleteAllSessions() {
+        this.sessions.clear()
+    }
 }

packages/core/src/amazonqDoc/controllers/chat/controller.ts

@@ -113,6 +113,9 @@ export class DocController {
         this.chatControllerMessageListeners.openDiff.event(async (data) => {
             return await this.openDiff(data)
         })
+        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
+            this.sessionStorage.deleteAllSessions()
+        })
     }
 
     /** Prompts user to choose a folder in current workspace for README creation/update.

packages/core/src/amazonqFeatureDev/controllers/chat/controller.ts

@@ -203,6 +203,9 @@ export class FeatureDevController {
         this.chatControllerMessageListeners.storeCodeResultMessageId.event(async (data) => {
             return await this.storeCodeResultMessageId(data)
         })
+        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
+            this.sessionStorage.deleteAllSessions()
+        })
     }
 
     private async processChatItemVotedMessage(tabId: string, vote: string) {

packages/core/src/amazonqGumby/chat/controller/controller.ts

@@ -147,6 +147,10 @@ export class GumbyController {
         this.chatControllerMessageListeners.errorThrown.event((data) => {
             return this.handleError(data)
         })
+
+        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
+            this.sessionStorage.removeActiveTab()
+        })
     }
 
     private async tabOpened(message: any) {

packages/core/src/amazonqTest/chat/controller/controller.ts

@@ -202,6 +202,10 @@ export class TestController {
                     return this.openDiff(data)
             }
         })
+
+        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
+            this.sessionStorage.removeActiveTab()
+        })
     }
 
     /**

packages/core/src/amazonqTest/chat/storages/chatSession.ts

@@ -6,7 +6,6 @@
 
 import { Session } from '../session/session'
 import { getLogger } from '../../../shared/logger/logger'
-import { AuthUtil } from '../../../codewhisperer/util/authUtil'
 
 export class SessionNotFoundError extends Error {}
 
@@ -15,11 +14,7 @@ export class ChatSessionManager {
     private activeSession: Session | undefined
     private isInProgress: boolean = false
 
-    constructor() {
-        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
-            this.removeActiveTab()
-        })
-    }
+    constructor() {}
 
     public static get Instance() {
         return this._instance || (this._instance = new this())

packages/core/src/codewhispererChat/controllers/chat/controller.ts

@@ -268,6 +268,9 @@ export class ChatController {
         this.chatControllerMessageListeners.processFileClick.onMessage((data) => {
             return this.processFileClickMessage(data)
         })
+        AuthUtil.instance.regionProfileManager.onDidChangeRegionProfile(() => {
+            this.sessionStorage.deleteAllSessions()
+        })
     }
 
     private registerUserPromptsWatcher() {

packages/core/src/codewhispererChat/storages/chatSession.ts

@@ -23,4 +23,8 @@ export class ChatSessionStorage {
     public deleteSession(tabID: string) {
         this.sessions.delete(tabID)
     }
+
+    public deleteAllSessions() {
+        this.sessions.clear()
+    }
 }