fix: intermediate text as separate messages, not progress heading

Intermediate assistant text (e.g., "서브에이전트 4개 병렬로 띄웠어요")
is now emitted as regular messages (no phase), not progress heading
updates. Progress heading is only set by task_started (🔄) events.

runners/agent-runner/src/index.ts

@@ -542,12 +542,10 @@ async function runQuery(
     const msgType = message.type === 'system' ? `system/${(message as { subtype?: string }).subtype}` : message.type;
     log(`[msg #${messageCount}] type=${msgType}`);
 
-    // Flush pending progress on any non-assistant message (ensures it's
-    // emitted before tool-activity or other events that depend on it).
+    // Flush pending intermediate text as a regular message on non-assistant events.
     if (message.type !== 'assistant' && pendingProgressText) {
       writeOutput({
         status: 'success',
-        phase: 'progress',
         result: pendingProgressText,
         newSessionId,
       });
@@ -627,7 +625,7 @@ async function runQuery(
         log(`Discarding pending progress (matches result)`);
         pendingProgressText = null;
       } else if (pendingProgressText) {
-        writeOutput({ status: 'success', phase: 'progress', result: pendingProgressText, newSessionId });
+        writeOutput({ status: 'success', result: pendingProgressText, newSessionId });
         pendingProgressText = null;
       }
       log(`Result #${resultCount}: subtype=${message.subtype}${textResult ? ` text=${textResult.slice(0, 200)}` : ''}`);
@@ -698,11 +696,10 @@ async function runQuery(
       // this would cause a duplicate. The pending text is flushed when the next
       // non-result message arrives, or discarded if result matches.
       if (stopReason !== 'end_turn' && textResult) {
-        // Flush any previous pending progress first
+        // Flush previous pending as a regular message (not progress heading)
         if (pendingProgressText) {
           writeOutput({
             status: 'success',
-            phase: 'progress',
             result: pendingProgressText,
             newSessionId,
           });