fix(web): keep the JSON toString on responses filled with defaults

[ChiragAgg5k]

Client.call attaches a non-enumerable toString to object responses. The { ...model.defaults, ...value } spread in fillDefaults drops it, so every response that goes through applyDefaults prints [object Object].

const preset = await general.getPreset();
preset.toString();
// before: '[object Object]'
// after:  '{"name":"guest","count":25,"enabled":false,"tier":"free"}'

Fix: when the input has its own toString, the same one is defined again on the filled result. This covers the web, node and react-native templates. Deno has no such override.

Test: the web, node and react-native e2e programs print preset toString: ... (JS_MODEL_TO_STRING_RESPONSES). WebNodeTest fails without the template change ([object Object]) and passes with it. Node20Test and ReactNativeTest pass.

Related: #2017

[hansi-codes]

🟢 Tier S · Ready to merge

The default-fill path restores the same JSON serialization behavior attached by Client.call, and the change adds observable E2E coverage for each affected SDK.

The Web, Node, and React Native templates now preserve the JSON toString behavior when applying model defaults. E2E coverage prints the stringified default-filled preset response across those SDKs.

Verdict	New comments	Fixed	Still open
✅ Approved	0	0	0

📂 Walkthrough · 10

File	Change
templates/web/src/client.ts.twig	Restores the JSON toString method on responses copied while applying defaults.
templates/node/src/client.ts.twig	Restores the JSON toString method on responses copied while applying defaults.
templates/react-native/src/client.ts.twig	Restores the JSON toString method on responses copied while applying defaults.
tests/e2e/Base.php	Adds the expected output for the default-filled response's JSON string.
tests/e2e/Node18Test.php, tests/e2e/Node20Test.php, tests/e2e/Node26Test.php	Includes the new JSON toString output in Node E2E expectations.
tests/e2e/ReactNativeTest.php, tests/e2e/WebChromiumTest.php, tests/e2e/WebNodeTest.php	Includes the new JSON toString output in React Native and Web E2E expectations.
tests/e2e/languages/node/test.js	Prints the default-filled preset's JSON string in the Node E2E program.
tests/e2e/languages/react-native/browser.js	Prints the default-filled preset's JSON string in the React Native E2E program.
tests/e2e/languages/web/index.html	Prints the default-filled preset's JSON string in the browser E2E program.
tests/e2e/languages/web/node.js	Prints the default-filled preset's JSON string in the Web Node E2E program.

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_{Reviewed 6197a30 · Details · Comment @hansi-codes review to re-run, or mention @hansi-codes with a question.}

[hansi-codes]

🟢 Tier S · Looks good to merge. Summary