Normalize artifact filenames and register new runs (#17)

Rename all output artifacts to their canonical case-id names
(mythos-craft.html / pelican-cycling.svg / skeleton-watch.html, with
-2 suffixes for variants) and drop the now-redundant "file" overrides
from the corresponding models/*.json runs.

Register new Claude Code runs for Opus 4.6 and 4.7 (new model JSONs),
add the GPT-5.5 Pro skeleton-watch run, and regenerate the README
registry tables. Remove stray .DS_Store files from outputs/.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

models/claude-opus-4-7-cc.json

@@ -0,0 +1,31 @@
+{
+  "label": "Claude Opus 4.7",
+  "vendor": "Anthropic",
+  "harness": "Claude Code",
+  "effort": "Max",
+  "artifactDir": "claude-opus-4-7/claude-code-max",
+  "order": 14.7,
+  "runs": {
+    "mythos-craft": {
+      "note": {
+        "zh": "在 Claude Code 中以 Claude Opus 4.7（Max 思考配额）一次生成；本页为未经修改的原始产出。",
+        "en": "Generated in one shot by Claude Opus 4.7 (Max effort) inside Claude Code; unmodified original output."
+      },
+      "contributor": "Nagi-ovo"
+    },
+    "pelican-cycling": {
+      "note": {
+        "zh": "在 Claude Code 中以 Claude Opus 4.7（Max 思考配额）一次生成；本页为未经修改的原始产出。",
+        "en": "Generated in one shot by Claude Opus 4.7 (Max effort) inside Claude Code; unmodified original output."
+      },
+      "contributor": "Nagi-ovo"
+    },
+    "skeleton-watch": {
+      "note": {
+        "zh": "在 Claude Code 中以 Claude Opus 4.7（Max 思考配额）一次生成；本页为未经修改的原始产出。",
+        "en": "Generated in one shot by Claude Opus 4.7 (Max effort) inside Claude Code; unmodified original output."
+      },
+      "contributor": "Nagi-ovo"
+    }
+  }
+}