diff --git a/.gitignore b/.gitignore
index f72684cfd..c2381a603 100644
--- a/.gitignore
+++ b/.gitignore
@@ -126,3 +126,11 @@ tools/codex_windows_correction_rapport.py
 docs/clients/
 
 .qw-baseline.log
+docs/coordination/.loop_state/
+
+# Runtime Python embedded pour l'installateur Inno Setup (local, ~11M, non versionné)
+deploy/installer/python-3.12-embed/
+deploy/installer/python-3.12.8-embed-amd64.zip
+# Artefacts de build installateur (EXE compilés + staging) — non versionnés
+deploy/releases/*.exe
+deploy/build/
diff --git a/deploy/installer/Lea.iss b/deploy/installer/Lea.iss
index 261ef4398..1b8bc160e 100644
--- a/deploy/installer/Lea.iss
+++ b/deploy/installer/Lea.iss
@@ -144,7 +144,7 @@ Filename: "{cmd}"; \
   Parameters: "/c copy /y ""{app}\Lea.bat"" ""{app}\Lea.bat.bak"" && powershell -NoProfile -ExecutionPolicy Bypass -File ""{app}\configure_embed.ps1"""; \
   WorkingDir: "{app}"; \
   StatusMsg: "Configuration du runtime Python embedded..."; \
-  Flags: runhidden waituntilterminated skipifsilent; \
+  Flags: runhidden waituntilterminated; \
   Components: pythonembed
 
 ; Lancer Lea a la fin de l'installation (optionnel)
@@ -243,9 +243,14 @@ begin
   // Essaye d'utiliser le GUID genere par Windows (via PowerShell)
   Guid := '';
   if CreateGUIDString(Guid) then
-    Result := LowerCase(StringChange(StringChange(StringChange(Guid, '{', ''), '}', ''), '-', ''))
+  begin
+    StringChange(Guid, '{', '');
+    StringChange(Guid, '}', '');
+    StringChange(Guid, '-', '');
+    Result := LowerCase(Guid);
+  end
   else
-    Result := IntToStr(GetTickCount);
+    Result := GetDateTimeString('yyyymmddhhnnss', #0, #0);
 
   // Ajoute un hash du hostname pour stabilite
   Hostname := GetComputerNameString();
@@ -404,8 +409,8 @@ begin
 
   // Derive ServerHost depuis ServerUrl : https://host/api/v1 -> host
   ServerHost := ServerUrl;
-  ServerHost := StringChange(ServerHost, 'https://', '');
-  ServerHost := StringChange(ServerHost, 'http://', '');
+  StringChange(ServerHost, 'https://', '');
+  StringChange(ServerHost, 'http://', '');
   SlashPos := Pos('/', ServerHost);
   if SlashPos > 0 then
     ServerHost := Copy(ServerHost, 1, SlashPos - 1);