feat(cross-project): découverte et contact inter-projets — tools MCP idea_project_{list,read_context,list_agents,ask_agent,cancel_agent}, permission contactable par agent + default_contactable persistée dans les templates, routage orchestrator par projectId+agentId — #260 (tests ciblés verts, QA en attente)

crates/application/src/template/usecases.rs

@@ -45,6 +45,8 @@ pub struct CreateTemplateInput {
     pub default_system_permissions: Option<SystemPermissionSet>,
     /// Optional agent-level MCP tool permission override applied at creation time.
     pub default_mcp_tool_policy: Option<McpToolPolicy>,
+    /// Whether agents created from this template are cross-project contactable.
+    pub default_contactable: bool,
 }
 
 /// Output of [`CreateTemplate::execute`].
@@ -90,6 +92,7 @@ impl CreateTemplate {
                 input.default_agent_name,
                 input.default_system_permissions,
                 input.default_mcp_tool_policy,
+                input.default_contactable,
             )
         })
         .map_err(|e| AppError::Invalid(e.to_string()))?;
@@ -122,6 +125,8 @@ pub struct UpdateTemplateInput {
     /// New default MCP tool policy. Outer `None` leaves the current value; inner
     /// `None` preserves project inheritance for future agents.
     pub default_mcp_tool_policy: Option<Option<McpToolPolicy>>,
+    /// New default contactable flag. `None` leaves the current value.
+    pub default_contactable: Option<bool>,
 }
 
 /// Output of [`UpdateTemplate::execute`].
@@ -175,6 +180,9 @@ impl UpdateTemplate {
                 input
                     .default_mcp_tool_policy
                     .unwrap_or_else(|| updated.default_mcp_tool_policy.clone()),
+                input
+                    .default_contactable
+                    .unwrap_or(updated.default_contactable),
             )
             .map_err(|e| AppError::Invalid(e.to_string()))?;
         self.templates.save(&updated).await?;
@@ -397,7 +405,8 @@ impl CreateAgentFromTemplate {
             origin,
             input.synchronized,
         )
-        .map_err(|e| AppError::Invalid(e.to_string()))?;
+        .map_err(|e| AppError::Invalid(e.to_string()))?
+        .with_contactable(template.default_contactable);
 
         let mut entries = manifest.entries;
         entries.push(ManifestEntry::from_agent(&agent));