fix(cache): purge cache only once at startup, not on every write

- Add clear_cache() called once in on_mount
- ensure_cache_dir() no longer deletes existing files
- This fixes the issue where only the last target's cache survived
- Add widget.refresh() calls to force UI updates

full_updater/app.py

@@ -6,7 +6,7 @@ from textual.containers import Horizontal, Vertical
 from textual.reactive import reactive
 from textual import work
 
-from full_updater.backend.cache import ensure_cache_dir, read_cache, get_cache_timestamp
+from full_updater.backend.cache import clear_cache, ensure_cache_dir, read_cache, get_cache_timestamp
 from full_updater.backend.scanner import (
     Target, ScanResult, get_lxc_list, lxc_is_running,
     ensure_debsecan_installed, scan_apt, scan_cve, write_cache, scan_target
@@ -46,6 +46,7 @@ class FullUpdaterApp(App):
                 yield SummaryPanel()
 
     def on_mount(self):
+        clear_cache()
         ensure_cache_dir()
         self.targets = [Target(target_id="host", name="hote", is_host=True)] + get_lxc_list()
         sidebar = self.query_one(Sidebar)
@@ -93,6 +94,7 @@ class FullUpdaterApp(App):
             result.error,
             result.status == "skipped"
         )
+        sidebar.refresh()
 
     def _finish_scan(self):
         self.pop_screen()
@@ -109,7 +111,7 @@ class FullUpdaterApp(App):
             )
         sidebar.refresh()
         if self.targets:
-            self.set_timer(0.1, lambda: self._select_target(self.targets[0].target_id))
+            self.set_timer(0.2, lambda: self._select_target(self.targets[0].target_id))
 
     def _select_target(self, target_id: str):
         self.selected_target = target_id
@@ -130,6 +132,7 @@ class FullUpdaterApp(App):
             skipped=not data and any(t.target_id == target_id and not t.is_host and not lxc_is_running(t.target_id) for t in self.targets),
             cache_time=get_cache_timestamp(cache_id)
         )
+        summary.refresh()
 
     def on_sidebar_target_selected(self, event: Sidebar.TargetSelected):
         self._select_target(event.target_id)

full_updater/backend/cache.py

@@ -7,9 +7,12 @@ from typing import Any
 CACHE_DIR = "/tmp/full-updater-cache"
 
 
-def ensure_cache_dir() -> None:
+def clear_cache() -> None:
     if os.path.exists(CACHE_DIR):
         shutil.rmtree(CACHE_DIR)
+
+
+def ensure_cache_dir() -> None:
     os.makedirs(CACHE_DIR, exist_ok=True)
 
 

full_updater/ui/summary.py

@@ -104,6 +104,13 @@ class SummaryPanel(Vertical):
         apt_btn.disabled = apt_count == 0
         cve_btn.disabled = cve_count == 0
 
+        # Forcer le refresh de tous les widgets modifiés
+        apt_btn.refresh()
+        cve_btn.refresh()
+        err_label.refresh()
+        btn.refresh()
+        cache_label.refresh()
+
     def on_button_pressed(self, event: Button.Pressed):
         if event.button.id == "btn-reload":
             self.post_message(self.ReloadPressed())