fix: Allow null in InputChangeEvent value field (#3722)

This fixes an old issue where `null` is not allowed as a valid value in
the `InputChangeEvent`

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Allow `null` for `InputChangeEvent.value`, add tests, update
changelogs, and refresh example snap bundle shasums.
> 
> - **SDK / Types**:
> - Allow `null` in `InputChangeEvent` by making `value` `nullable` in
`InputChangeEventStruct`
(`packages/snaps-sdk/src/types/handlers/user-input.ts`).
> - Add unit test to validate `null` acceptance
(`packages/snaps-sdk/src/types/handlers/user-input.test.ts`).
> - **Changelogs**:
> - Note fix in `packages/snaps-sdk/CHANGELOG.md` and
`packages/snaps-execution-environments/CHANGELOG.md`.
> - **Examples**:
> - Update `source.shasum` for example snaps
(`packages/examples/packages/*/snap.manifest.json`).
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
c698209. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: GuillaumeRx

packages/examples/packages/dialogs/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "RT3QK/Bl2XW8O93eTzxm4kkhbWU2YLNgl0wIpQtA+Rw=",
+    "shasum": "tPhKkcndt1BKiNffSxTpxGae+N0L8dqtbsWuMPtgwXY=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/examples/packages/file-upload/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "xn5ZLnAqlgmHjAQ6k8/otZ3fxZsFXtt+gW4wcGPMkRk=",
+    "shasum": "34pGPXChz9MhZtvuhbA3mr3iJRRtf5BZuchUOppsFz8=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/examples/packages/home-page/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "O1/68sw9rGYH31FRWjjEs2nSWiH3uKJIE/CcWGDylCs=",
+    "shasum": "phEuQysVh6vKuOES3NkeN22l5/YcycRVdm10adIH7b8=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/examples/packages/interactive-ui/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "Ov0Ar65MX7lo2uYyp3Ib4ewVnK/HenJye0xb7uTC9E8=",
+    "shasum": "UrhDVNzx7t2w36ORy5WsywNkZQvHXcR6Sl7jPZRvG4o=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/examples/packages/jsx/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "2yd5MwUprX+3XNKZERiNu6IONA4kAtYIE76fEel23aQ=",
+    "shasum": "ts/r1Ab8K2GVa0X8oqiDlmiyKlN/fLyBHS+uljXrhhM=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/examples/packages/preinstalled/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "JqzNl7ziMGzb/5CkbdCNzBhcagAdRVo+q7VoLlYNut8=",
+    "shasum": "5GjC5OYTtXLw1aHztViZ2Xf1dZIgvqP4xCgw4gPT1JY=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/examples/packages/send-flow/snap.manifest.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/snaps.git"
   },
   "source": {
-    "shasum": "yEqB3AAMpEz6knhYbegfL699DkfGcq+akyyPmSjILSg=",
+    "shasum": "P0uud2dk/a0PvybjWdaOPXzWlhQkUP4aHlxy8KUu4Wk=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",

packages/snaps-execution-environments/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Input change events in `onUserInput` now accepts `null` values ([#3722](https://github.com/MetaMask/snaps/pull/3722))
+
 ## [10.2.2]
 
 ### Changed

packages/snaps-sdk/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Input change events in `onUserInput` now accepts `null` values ([#3722](https://github.com/MetaMask/snaps/pull/3722))
+
 ## [10.0.0]
 
 ### Changed

packages/snaps-sdk/src/types/handlers/user-input.test.ts

@@ -66,4 +66,17 @@ describe('InputChangeEventStruct', () => {
       ),
     ).toBe(true);
   });
+
+  it('accepts null values', () => {
+    expect(
+      is(
+        {
+          type: 'InputChangeEvent',
+          name: 'foo',
+          value: null,
+        },
+        InputChangeEventStruct,
+      ),
+    ).toBe(true);
+  });
 });