Set Composer 2.5 (Grok Build TUI) effort to Default, not blank

A missing effort reads as Max by the repo's "effort defaults to max"
convention; this run was the harness default, so set it explicitly to
"Default" and surface it in both README registry rows.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.en.md

@@ -33,7 +33,7 @@ One-shot LLM eval cases by NAGI STUDIO: same prompt, different model x harness x
 | Gemini 3.1 Pro | Google | AntiGravity · High<br>Google AI Studio · High | 03 |
 | Gemini 3.5 Flash | Google | AntiGravity · High<br>Google AI Studio · High | 03 |
 | Grok Build | xAI | Grok Build TUI · Max | 02 |
-| Composer 2.5 | Cursor | Cursor · Max<br>Grok Build TUI | 03 |
+| Composer 2.5 | Cursor | Cursor · Max<br>Grok Build TUI · Default | 03 |
 | DeepSeek-V4-Pro | DeepSeek | Claude Code · Max | 02 |
 | Doubao Seed 2.0 Pro | ByteDance | Doubao Web · Pro Mode | 01 |
 | Doubao Seed 2.0 Mini | ByteDance | Doubao Web · Fast Mode | 01 |

README.md

@@ -33,7 +33,7 @@ NAGI STUDIO 的 LLM 测评案例集：同一段提示词，不同「模型 × Ha
 | Gemini 3.1 Pro | Google | AntiGravity · High<br>Google AI Studio · High | 03 |
 | Gemini 3.5 Flash | Google | AntiGravity · High<br>Google AI Studio · High | 03 |
 | Grok Build | xAI | Grok Build TUI · Max | 02 |
-| Composer 2.5 | Cursor | Cursor · Max<br>Grok Build TUI | 03 |
+| Composer 2.5 | Cursor | Cursor · Max<br>Grok Build TUI · Default | 03 |
 | DeepSeek-V4-Pro | DeepSeek | Claude Code · Max | 02 |
 | Doubao Seed 2.0 Pro | ByteDance | Doubao Web · Pro Mode | 01 |
 | Doubao Seed 2.0 Mini | ByteDance | Doubao Web · Fast Mode | 01 |

models/composer-2-5-grok-build.json

@@ -2,6 +2,7 @@
   "label": "Composer 2.5",
   "vendor": "Cursor",
   "harness": "Grok Build TUI",
+  "effort": "Default",
   "order": 72,
   "runs": {
     "mythos-craft": {