fix(tui): keep inline diffs below tool rows and strip ANSI

Follow-up on #13729 from blitz screenshot feedback.\n\n- When tool.complete carried inline_diff but no buffered assistant text existed, pending tool rows were still in streamPendingTools, so diff rendered above the tool row section. appendSegmentMessage now emits pending tool rows as a trail segment before appending the diff artifact.\n- Strip ANSI color escapes from inline_diff payloads so we don't render loud red/green terminal palettes in the transcript.

ui-tui/src/app/turnController.ts

@@ -190,6 +190,16 @@ class TurnController {
    */
   appendSegmentMessage(msg: Msg) {
     this.flushStreamingSegment()
+
+    if (this.pendingSegmentTools.length) {
+      this.segmentMessages = [
+        ...this.segmentMessages,
+        { kind: 'trail', role: 'system', text: '', tools: this.pendingSegmentTools }
+      ]
+      this.pendingSegmentTools = []
+      patchTurnState({ streamPendingTools: [] })
+    }
+
     this.segmentMessages = [...this.segmentMessages, msg]
     patchTurnState({ streamSegments: this.segmentMessages })
   }