v0.6.4 - Retour onedir (configuration stable)

Changements :
- Retour a --onedir : seule configuration sans erreur DLL confirmee
- _internal/ recommite dans le repo
- build.bat restaure avec copie automatique de _internal/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_internal/_tcl_data/msgs/zh_cn.msg

@@ -0,0 +1,7 @@
+# created by tools/loadICU.tcl -- do not edit
+namespace eval ::tcl::clock {
+    ::msgcat::mcset zh_CN DATE_FORMAT "%Y-%m-%e"
+    ::msgcat::mcset zh_CN TIME_FORMAT "%k:%M:%S"
+    ::msgcat::mcset zh_CN TIME_FORMAT_12 "%P%I\u65f6%M\u5206%S\u79d2"
+    ::msgcat::mcset zh_CN DATE_TIME_FORMAT "%Y-%m-%e %k:%M:%S %z"
+}