fix: 修正 logo 中 N 和 G 字母造型

N 添加对角线笔画（█▄ █），G 添加内横杠（█ ▀█），
避免与 O 字母造型雷同。同步更新 ui.ts 中的硬编码 wordmark。

.opencode/opencode.jsonc

@@ -0,0 +1,20 @@
+{
+  "$schema": "https://opencode.ai/config.json",
+  "provider": {},
+  "permission": {},
+  "references": {
+    "effect": {
+      "repository": "github.com/Effect-TS/effect-smol",
+      "description": "Use for Effect v4 and effect-smol implementation details",
+    },
+    "opencode-local": {
+      "path": "~/.local/share/opencode",
+      "description": "Contains opencode logs and data",
+    },
+  },
+  "mcp": {},
+  "tools": {
+    "github-triage": false,
+    "github-pr-search": false,
+  },
+}