fix(tui): restore agent name in task progress display (anomalyco#15946)

Cherry-picked from upstream PR anomalyco#15946.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: IgorTavcar

packages/opencode/src/cli/cmd/tui/routes/session/index.tsx

@@ -1974,7 +1974,10 @@ function Task(props: ToolProps<typeof TaskTool>) {
 
   const content = createMemo(() => {
     if (!props.input.description) return ""
-    let content = [`Task ${props.input.description}`]
+    const agentPrefix = props.input.subagent_type
+      ? `${Locale.titlecase(props.input.subagent_type)}: `
+      : ""
+    let content = [`${agentPrefix}Task ${props.input.description}`]
 
     if (isRunning() && tools().length > 0) {
       // content[0] += ` · ${tools().length} toolcalls`