config(amazonq): disable auto-review by default (aws#7058)

## Problem

We heard from users that auto scans are sometimes causing highlight
linting issues where entire IDE is now yellow-underlined with warnings
that may sometimes be irrelevant

## Solution

We will disable auto scans by default, and user can re-enable in the
menu.

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: zuoyaofu

packages/amazonq/.changes/next-release/bugfix-ad9a8829-efa0-463b-ba2f-c89ff1cb69e4.json

@@ -0,0 +1,4 @@
+{
+	"type": "bugfix",
+	"description": "/review: disable auto-review by default"
+}

packages/amazonq/test/unit/codewhisperer/service/securityScanHandler.test.ts

@@ -16,6 +16,7 @@ import {
     pollScanJobStatus,
     SecurityScanTimedOutError,
     CodeWhispererConstants,
+    CodeScansState,
 } from 'aws-core-vscode/codewhisperer'
 import { timeoutUtils } from 'aws-core-vscode/shared'
 import assert from 'assert'
@@ -281,6 +282,7 @@ describe('securityScanHandler', function () {
                 shouldAdvanceTime: true,
             })
             sinon.stub(timeoutUtils, 'sleep').resolves()
+            sinon.stub(CodeScansState.instance, 'isScansEnabled').returns(true)
         })
 
         afterEach(function () {

packages/core/src/codewhisperer/models/model.ts

@@ -280,7 +280,7 @@ export class CodeScansState {
         return (this.#instance ??= new this())
     }
 
-    protected constructor(fallback: boolean = true) {
+    protected constructor(fallback: boolean = false) {
         this.#fallback = fallback
     }
 

packages/core/src/test/codewhisperer/commands/basicCommands.test.ts

@@ -193,36 +193,36 @@ describe('CodeWhisperer-basicCommands', function () {
             codeScansState = new TestCodeScansState()
         })
 
-        it('has auto scans enabled by default', async function () {
+        it('has auto scans disabled by default', async function () {
             targetCommand = testCommand(toggleCodeScans, codeScansState)
-            assert.strictEqual(codeScansState.isScansEnabled(), true)
+            assert.strictEqual(codeScansState.isScansEnabled(), false)
         })
 
         it('toggles states as expected', async function () {
             targetCommand = testCommand(toggleCodeScans, codeScansState)
-            assert.strictEqual(codeScansState.isScansEnabled(), true)
-            await targetCommand.execute(placeholder, cwQuickPickSource)
             assert.strictEqual(codeScansState.isScansEnabled(), false)
             await targetCommand.execute(placeholder, cwQuickPickSource)
             assert.strictEqual(codeScansState.isScansEnabled(), true)
             await targetCommand.execute(placeholder, cwQuickPickSource)
             assert.strictEqual(codeScansState.isScansEnabled(), false)
+            await targetCommand.execute(placeholder, cwQuickPickSource)
+            assert.strictEqual(codeScansState.isScansEnabled(), true)
         })
 
         it('setScansEnabled() works as expected', async function () {
-            // initially true
-            assert.strictEqual(codeScansState.isScansEnabled(), true)
-
-            await codeScansState.setScansEnabled(false)
+            // initially false
             assert.strictEqual(codeScansState.isScansEnabled(), false)
 
-            // set new state to current state
-            await codeScansState.setScansEnabled(false)
-            assert.strictEqual(codeScansState.isScansEnabled(), false)
+            await codeScansState.setScansEnabled(true)
+            assert.strictEqual(codeScansState.isScansEnabled(), true)
 
-            // set to opposite state
+            // set new state to current state
             await codeScansState.setScansEnabled(true)
             assert.strictEqual(codeScansState.isScansEnabled(), true)
+
+            // set to opposite state
+            await codeScansState.setScansEnabled(false)
+            assert.strictEqual(codeScansState.isScansEnabled(), false)
         })
 
         it('triggers event listener when toggled', async function () {
@@ -239,28 +239,28 @@ describe('CodeWhisperer-basicCommands', function () {
             assert.strictEqual(eventListener.callCount, 1)
         })
 
-        it('emits aws_modifySetting event on user toggling autoScans - deactivate', async function () {
+        it('emits aws_modifySetting event on user toggling autoScans - activate', async function () {
             targetCommand = testCommand(toggleCodeScans, codeScansState)
             await targetCommand.execute(placeholder, cwQuickPickSource)
 
-            assert.strictEqual(codeScansState.isScansEnabled(), false)
+            assert.strictEqual(codeScansState.isScansEnabled(), true)
             assertTelemetryCurried('aws_modifySetting')({
                 settingId: CodeWhispererConstants.autoScansConfig.settingId,
-                settingState: CodeWhispererConstants.autoScansConfig.deactivated,
+                settingState: CodeWhispererConstants.autoScansConfig.activated,
             })
         })
 
-        it('emits aws_modifySetting event on user toggling autoScans -- activate', async function () {
-            codeScansState = new TestCodeScansState(false)
-            assert.strictEqual(codeScansState.isScansEnabled(), false)
+        it('emits aws_modifySetting event on user toggling autoScans -- deactivate', async function () {
+            codeScansState = new TestCodeScansState(true)
+            assert.strictEqual(codeScansState.isScansEnabled(), true)
 
             targetCommand = testCommand(toggleCodeScans, codeScansState)
             await targetCommand.execute(placeholder, cwQuickPickSource)
 
-            assert.strictEqual(codeScansState.isScansEnabled(), true)
+            assert.strictEqual(codeScansState.isScansEnabled(), false)
             assertTelemetryCurried('aws_modifySetting')({
                 settingId: CodeWhispererConstants.autoScansConfig.settingId,
-                settingState: CodeWhispererConstants.autoScansConfig.activated,
+                settingState: CodeWhispererConstants.autoScansConfig.deactivated,
             })
         })