fix: load agentType from DB, fix host process PATH and session resume

- Read/write agent_type column in getAllRegisteredGroups/setRegisteredGroup
  (was missing, causing all groups to fall back to claude-code)
- Strip CLAUDECODE env var to prevent nested session detection
- Add node binary path to spawned process PATH for launchd compatibility
- Clear stale container-era sessions that reference /workspace/group

src/db.ts

@@ -575,6 +575,7 @@ export function getRegisteredGroup(
         container_config: string | null;
         requires_trigger: number | null;
         is_main: number | null;
+        agent_type: string | null;
       }
     | undefined;
   if (!row) return undefined;
@@ -597,6 +598,7 @@ export function getRegisteredGroup(
     requiresTrigger:
       row.requires_trigger === null ? undefined : row.requires_trigger === 1,
     isMain: row.is_main === 1 ? true : undefined,
+    agentType: (row.agent_type as RegisteredGroup['agentType']) || undefined,
   };
 }
 
@@ -605,8 +607,8 @@ export function setRegisteredGroup(jid: string, group: RegisteredGroup): void {
     throw new Error(`Invalid group folder "${group.folder}" for JID ${jid}`);
   }
   db.prepare(
-    `INSERT OR REPLACE INTO registered_groups (jid, name, folder, trigger_pattern, added_at, container_config, requires_trigger, is_main)
-     VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+    `INSERT OR REPLACE INTO registered_groups (jid, name, folder, trigger_pattern, added_at, container_config, requires_trigger, is_main, agent_type)
+     VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
   ).run(
     jid,
     group.name,
@@ -616,6 +618,7 @@ export function setRegisteredGroup(jid: string, group: RegisteredGroup): void {
     group.containerConfig ? JSON.stringify(group.containerConfig) : null,
     group.requiresTrigger === undefined ? 1 : group.requiresTrigger ? 1 : 0,
     group.isMain ? 1 : 0,
+    group.agentType || 'claude-code',
   );
 }
 
@@ -629,6 +632,7 @@ export function getAllRegisteredGroups(): Record<string, RegisteredGroup> {
     container_config: string | null;
     requires_trigger: number | null;
     is_main: number | null;
+    agent_type: string | null;
   }>;
   const result: Record<string, RegisteredGroup> = {};
   for (const row of rows) {
@@ -650,6 +654,7 @@ export function getAllRegisteredGroups(): Record<string, RegisteredGroup> {
       requiresTrigger:
         row.requires_trigger === null ? undefined : row.requires_trigger === 1,
       isMain: row.is_main === 1 ? true : undefined,
+      agentType: (row.agent_type as RegisteredGroup['agentType']) || undefined,
     };
   }
   return result;