chantier: durcissement reprise headless inter-projets + persistance profils Opencode

- Implémentation reprise de session Opencode headless (conversational_recovery)
- Persistance des profils IA Opencode dans .ideai/memory avec JSON Schema
- Gestion des permissions MCP pour agents externes
- Tests QA verts : structured_launch_d3, conversation_log, tickets_missing_carnet, agents, ProfilesSettings

.ideai/mcp-tool-permissions.json

@@ -21,7 +21,6 @@
       "idea_context_propose",
       "idea_memory_write",
       "idea_workstate_set",
-      "idea_create_skill",
       "idea_ticket_create",
       "idea_ticket_update",
       "idea_ticket_update_status",
@@ -31,7 +30,8 @@
       "idea_ticket_unlink",
       "idea_template_create",
       "idea_template_update",
-      "idea_template_delete"
+      "idea_template_delete",
+      "idea_create_skill"
     ]
   },
   "agents": [