fix(deps): patch @tanstack/ai to fix in-place tool-call part mutations

Four message-updater functions mutated tool-call parts in-place after
shallow-copying the parts array, breaking proxy-based reactivity in
Svelte 5. Bun patch replaces mutations with immutable spread copies.

Upstream PR: TanStack/ai#395

Author: braden-w

package.json

@@ -101,5 +101,8 @@
 	},
 	"dependencies": {
 		"tinyexec": "^1.0.4"
+	},
+	"patchedDependencies": {
+		"@tanstack/ai@0.8.1": "patches/@tanstack%2Fai@0.8.1.patch"
 	}
 }

patches/@tanstack%2Fai@0.8.1.patch

@@ -0,0 +1,122 @@
+diff --git a/dist/esm/activities/chat/stream/message-updaters.js b/dist/esm/activities/chat/stream/message-updaters.js
+index 535e88d124ae40e8346a58765d3b34cb4f74c42f..300b9e376f481661f1cee3af4d735ffeff22b031 100644
+--- a/dist/esm/activities/chat/stream/message-updaters.js
++++ b/dist/esm/activities/chat/stream/message-updaters.js
+@@ -74,10 +74,14 @@ function updateToolCallApproval(messages, messageId, toolCallId, approvalId) {
+       (p) => p.type === "tool-call" && p.id === toolCallId
+     );
+     if (toolCallPart) {
+-      toolCallPart.state = "approval-requested";
+-      toolCallPart.approval = {
+-        id: approvalId,
+-        needsApproval: true
++      const index = parts.indexOf(toolCallPart);
++      parts[index] = {
++        ...toolCallPart,
++        state: "approval-requested",
++        approval: {
++          id: approvalId,
++          needsApproval: true
++        }
+       };
+     }
+     return { ...msg, parts };
+@@ -90,12 +94,12 @@ function updateToolCallWithOutput(messages, toolCallId, output, state, errorText
+       (p) => p.type === "tool-call" && p.id === toolCallId
+     );
+     if (toolCallPart) {
+-      toolCallPart.output = errorText ? { error: errorText } : output;
+-      if (state) {
+-        toolCallPart.state = state;
+-      } else {
+-        toolCallPart.state = "input-complete";
+-      }
++      const index = parts.indexOf(toolCallPart);
++      parts[index] = {
++        ...toolCallPart,
++        output: errorText ? { error: errorText } : output,
++        state: state ?? "input-complete"
++      };
+     }
+     return { ...msg, parts };
+   });
+@@ -107,8 +111,12 @@ function updateToolCallApprovalResponse(messages, approvalId, approved) {
+       (p) => p.type === "tool-call" && p.approval?.id === approvalId
+     );
+     if (toolCallPart && toolCallPart.approval) {
+-      toolCallPart.approval.approved = approved;
+-      toolCallPart.state = "approval-responded";
++      const index = parts.indexOf(toolCallPart);
++      parts[index] = {
++        ...toolCallPart,
++        approval: { ...toolCallPart.approval, approved },
++        state: "approval-responded"
++      };
+     }
+     return { ...msg, parts };
+   });
+diff --git a/src/activities/chat/stream/message-updaters.ts b/src/activities/chat/stream/message-updaters.ts
+index 80b94d59aac3eeed909e97fa3b559986d8947315..57ffbe2e6f4070ebae837acf3ba2a09e872f352a 100644
+--- a/src/activities/chat/stream/message-updaters.ts
++++ b/src/activities/chat/stream/message-updaters.ts
+@@ -150,10 +150,14 @@ export function updateToolCallApproval(
+     )
+ 
+     if (toolCallPart) {
+-      toolCallPart.state = 'approval-requested'
+-      toolCallPart.approval = {
+-        id: approvalId,
+-        needsApproval: true,
++      const index = parts.indexOf(toolCallPart)
++      parts[index] = {
++        ...toolCallPart,
++        state: 'approval-requested',
++        approval: {
++          id: approvalId,
++          needsApproval: true,
++        },
+       }
+     }
+ 
+@@ -181,7 +185,8 @@ export function updateToolCallState(
+     )
+ 
+     if (toolCallPart) {
+-      toolCallPart.state = state
++      const index = parts.indexOf(toolCallPart)
++      parts[index] = { ...toolCallPart, state }
+     }
+ 
+     return { ...msg, parts }
+@@ -206,11 +211,11 @@ export function updateToolCallWithOutput(
+     )
+ 
+     if (toolCallPart) {
+-      toolCallPart.output = errorText ? { error: errorText } : output
+-      if (state) {
+-        toolCallPart.state = state
+-      } else {
+-        toolCallPart.state = 'input-complete'
++      const index = parts.indexOf(toolCallPart)
++      parts[index] = {
++        ...toolCallPart,
++        output: errorText ? { error: errorText } : output,
++        state: state ?? 'input-complete',
+       }
+     }
+ 
+@@ -235,8 +240,12 @@ export function updateToolCallApprovalResponse(
+     )
+ 
+     if (toolCallPart && toolCallPart.approval) {
+-      toolCallPart.approval.approved = approved
+-      toolCallPart.state = 'approval-responded'
++      const index = parts.indexOf(toolCallPart)
++      parts[index] = {
++        ...toolCallPart,
++        approval: { ...toolCallPart.approval, approved },
++        state: 'approval-responded',
++      }
+     }
+ 
+     return { ...msg, parts }