fix: use Gitea-compatible package scope

extensions/subagents/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@_jb/pi-subagents",
+  "name": "@jbcode/pi-subagents",
   "version": "0.1.0",
   "description": "Pi extension for background subagents across Pi, Claude Code, and Codex backends.",
   "type": "module",
@@ -9,7 +9,7 @@
   "files": ["index.ts", "src", "docs", "README.md", "LICENSE", "!**/*.test.ts"],
   "pi": { "extensions": ["./index.ts"] },
   "dependencies": {
-    "@_jb/pi-shared": "workspace:^",
+    "@jbcode/pi-shared": "workspace:^",
     "@anthropic-ai/claude-agent-sdk": "catalog:",
     "effect": "catalog:"
   },