feat(backend): API Tauri pour la gestion des permissions tools MCP (#82 lot B4)

Expose au niveau application/DTO/commandes Tauri le catalogue et les
permissions des tools MCP (application/mcp_tool_permissions.rs, dto.rs,
commands.rs) pour une future UI de gestion.

Lot B4 du ticket #82, dernier lot backend : ferme la boucle sur B1
(domaine/store) + B2 (enforcement MCP stdio) + B3 (parité
OpenAI-compatible).

QA vert.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

crates/application/src/lib.rs

@@ -22,6 +22,7 @@ pub mod git;
 pub mod health;
 pub mod issues;
 pub mod layout;
+pub mod mcp_tool_permissions;
 pub mod memory;
 pub mod model_server;
 pub mod orchestrator;
@@ -105,6 +106,12 @@ pub use layout::{
     SetActiveLayout, SetActiveLayoutInput, SetActiveLayoutOutput, SnapshotRunningAgents,
     SnapshotRunningAgentsInput, SnapshotRunningAgentsOutput, LAYOUTS_FILE,
 };
+pub use mcp_tool_permissions::{
+    McpToolPermissionCatalogue, ReadMcpToolPermissions, ReadMcpToolPermissionsInput,
+    ReadMcpToolPermissionsOutput, UpdateAgentMcpToolPermissions,
+    UpdateAgentMcpToolPermissionsInput, UpdateProjectMcpToolPermissions,
+    UpdateProjectMcpToolPermissionsInput,
+};
 pub use memory::{
     CreateMemory, CreateMemoryInput, CreateMemoryOutput, DeleteMemory, DeleteMemoryInput,
     GetMemory, GetMemoryInput, GetMemoryOutput, HarvestMemoryFromTurn, ListMemories,