fix(extension): rollback content/background/sidepanel à v0.3.1, version 0.4.1

Le rollback complet de content.js, background.js et sidepanel.js vers
la v0.3.1 (que tu confirmes fonctionner) règle la régression. Mes
modifs depuis (forwarder, shim chrome<->browser, setPickMode auto,
retry PING) ont introduit une régression silencieuse que je n'ai pas
reproduite localement. Je remets le code qui marchait.

Manifest = v0.3.1 + ajout sidebar_action + browser_specific_settings.gecko
pour le build Firefox. Version bumpée 0.3.1 → 0.4.1.

memento-note/extension/manifest.json

@@ -1,10 +1,16 @@
 {
   "manifest_version": 3,
   "name": "__MSG_extName__",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "__MSG_extDescription__",
   "default_locale": "en",
-  "permissions": ["activeTab", "scripting", "storage", "sidePanel", "tabs"],
+  "permissions": [
+    "activeTab",
+    "scripting",
+    "storage",
+    "sidePanel",
+    "tabs"
+  ],
   "host_permissions": [
     "http://localhost:3000/*",
     "http://127.0.0.1:3000/*",
@@ -18,6 +24,22 @@
   "side_panel": {
     "default_path": "sidepanel.html"
   },
+  "content_scripts": [
+    {
+      "matches": [
+        "http://*/*",
+        "https://*/*"
+      ],
+      "js": [
+        "content.js"
+      ],
+      "run_at": "document_idle",
+      "all_frames": false
+    }
+  ],
+  "action": {
+    "default_title": "__MSG_extActionTitle__"
+  },
   "sidebar_action": {
     "default_title": "__MSG_extActionTitle__",
     "default_panel": "sidepanel.html"
@@ -27,16 +49,5 @@
       "id": "memento-clipper@memento-note.com",
       "strict_min_version": "115.0"
     }
-  },
-  "content_scripts": [
-    {
-      "matches": ["http://*/*", "https://*/*"],
-      "js": ["content.js"],
-      "run_at": "document_idle",
-      "all_frames": false
-    }
-  ],
-  "action": {
-    "default_title": "__MSG_extActionTitle__"
   }
 }