[DASH-540] Nebula - Various UI improvements (#5777)

## Problem solved

DASH-540

* on the chat page -> move the container 1 level down - so the chat can be scrolled from the corner of the page as well
* reduce container max-width for the history page to 800px to match it with landing page
* stop the auto scroll if user interacts with chat UI
* custom 404 page for the nebula subdomain
* remove the announcement banner from the 404 pages ( this affects entire dashboard)
* fix empty title in chat history page
* fix overflow in chat history page on mobile when there's a long text without a whitespace

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## PR-Codex overview
This PR focuses on enhancing the chat functionality and user experience in the `Nebula` application. It introduces auto-scrolling features, improves layout styling, and adds a new `404 Not Found` page.

### Detailed summary
- Added auto-scrolling feature to `Chats` component.
- Introduced `setEnableAutoScroll` function to manage scrolling behavior.
- Enhanced styling in `ChatHistoryPage` and `SessionCard`.
- Implemented a new `NebulaNotFound` component with a user-friendly 404 message.
- Updated `ChatPageContent` to utilize the new auto-scroll functionality.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

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.changeset/shy-bats-eat.md

@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Validate getContract params

packages/thirdweb/src/contract/contract.ts

@@ -1,6 +1,7 @@
 import type { Abi } from "abitype";
 import type { Chain } from "../chains/types.js";
 import type { ThirdwebClient } from "../client/client.js";
+import { isAddress } from "../utils/address.js";
 
 /**
  * @contract
@@ -42,5 +43,20 @@ export type ThirdwebContract<abi extends Abi = []> = Readonly<
 export function getContract<const abi extends Abi = []>(
   options: ContractOptions<abi>,
 ): ThirdwebContract<abi> {
+  if (!options.client) {
+    throw new Error(
+      `getContract validation error - invalid client: ${options.client}`,
+    );
+  }
+  if (!isAddress(options.address)) {
+    throw new Error(
+      `getContract validation error - invalid address: ${options.address}`,
+    );
+  }
+  if (!options.chain || !options.chain.id) {
+    throw new Error(
+      `getContract validation error - invalid chain: ${options.chain}`,
+    );
+  }
   return options;
 }

packages/thirdweb/src/wallets/smart/smart-wallet-dev.test.ts

@@ -1,6 +1,6 @@
 import { beforeAll, describe, expect, it } from "vitest";
 import { TEST_CLIENT } from "../../../test/src/test-clients.js";
-import { arbitrumSepolia } from "../../chains/chain-definitions/arbitrum.js";
+import { arbitrumSepolia } from "../../chains/chain-definitions/arbitrum-sepolia.js";
 import { type ThirdwebContract, getContract } from "../../contract/contract.js";
 import { balanceOf } from "../../extensions/erc1155/__generated__/IERC1155/read/balanceOf.js";
 import { claimTo } from "../../extensions/erc1155/drops/write/claimTo.js";