test: adjust mock stream timing delays in toolFlows

Increase delays between stream deltas to better simulate realistic
streaming behavior. Changes spacing from 2x+300ms, 2x+400ms to
3x+50ms, 3x+150ms, and extends final delay to 3x+500ms for more
natural pacing in mock scenarios.

Author: ThomasK33

src/services/mock/scenarios/toolFlows.ts

@@ -110,17 +110,17 @@ const listDirectoryTurn: ScenarioTurn = {
       },
       {
         kind: "stream-delta",
-        delay: STREAM_BASE_DELAY * 2 + 300,
+        delay: STREAM_BASE_DELAY * 3 + 50,
         text: "- package.json\n",
       },
       {
         kind: "stream-delta",
-        delay: STREAM_BASE_DELAY * 2 + 400,
+        delay: STREAM_BASE_DELAY * 3 + 150,
         text: "- src",
       },
       {
         kind: "stream-end",
-        delay: STREAM_BASE_DELAY * 3,
+        delay: STREAM_BASE_DELAY * 3 + 500,
         metadata: {
           model: "openai:gpt-5",
           inputTokens: 74,