docs(i18n): update translations for email, GnuPG, key-server and version modules

* Refresh and add localized strings across multiple modules (email, GnuPG
  info, key-server sync, version checking and key search) to improve UI
  coverage and clarity.
* Restore and standardize email metadata labels and validation messages,
  and expand EML/email-operation error texts to provide clearer guidance
  for end users and troubleshooting.
* Introduce localized UI entries for `GnuPGInfo` and enhance `SearchKeyDialog`
  translations to make key-search and GnuPG information screens usable in
  several locales.
* Harmonize labels (e.g., CC/BCC/From/To/Subject/Date), warnings and file
  I/O messages to improve consistency and readability.
* No functional logic changes; purely translation/localization updates.

6 files changed, 233 insertions, 65 deletions

diff --git a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.de_DE.ts b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.de_DE.ts
index cc4ba4d..3af32d5 100644
--- a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.de_DE.ts
+++ b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.de_DE.ts
@@ -7,12 +7,40 @@
         <location filename="../GnuPGInfoGatheringModule.cpp" line="103"/>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="173"/>
         <source>GnuPG</source>
-        <translation type="unfinished">GnuPG</translation>
+        <translation>GnuPG</translation>
     </message>
     <message>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="175"/>
         <source>Information about GnuPG</source>
-        <translation type="unfinished"></translation>
+        <translation>Informationen zu GnuPG</translation>
+    </message>
+</context>
+<context>
+    <name>GnuPGInfo</name>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="14"/>
+        <source>GnuPG Info</source>
+        <translation>GnuPG-Informationen</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="71"/>
+        <source>Version</source>
+        <translation>Version</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="119"/>
+        <source>Components</source>
+        <translation>Komponenten</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="151"/>
+        <source>Directories</source>
+        <translation>Verzeichnisse</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="180"/>
+        <source>Options</source>
+        <translation>Optionen</translation>
     </message>
 </context>
 <context>
@@ -20,53 +48,53 @@
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Name</source>
-        <translation type="unfinished">Name</translation>
+        <translation>Name</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Description</source>
-        <translation type="unfinished">Beschreibung</translation>
+        <translation>Beschreibung</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Version</source>
-        <translation type="unfinished">Version</translation>
+        <translation>Version</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Checksum</source>
-        <translation type="unfinished">Prüfsumme</translation>
+        <translation>Prüfsumme</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Binary Path</source>
-        <translation type="unfinished">Binärer Pfad</translation>
+        <translation>Binärpfad</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="52"/>
         <source>Components</source>
-        <translation type="unfinished">Komponenten</translation>
+        <translation>Komponenten</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="53"/>
         <source>Directories</source>
-        <translation type="unfinished">Verzeichnisse</translation>
+        <translation>Verzeichnisse</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="54"/>
         <source>Options</source>
-        <translation type="unfinished">Optionen</translation>
+        <translation>Optionen</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Directory Type</source>
-        <translation type="unfinished">Verzeichnis Typ</translation>
+        <translation>Verzeichnistyp</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Path</source>
-        <translation type="unfinished">Pfad</translation>
+        <translation>Pfad</translation>
     </message>
     <message>
         <source>Configurations</source>
@@ -85,7 +113,7 @@
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Key</source>
-        <translation type="unfinished">Schlüssel</translation>
+        <translation>Schlüssel</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="96"/>
@@ -95,7 +123,7 @@
     <message>
         <location filename="../GnupgTab.cpp" line="97"/>
         <source>Value</source>
-        <translation type="unfinished">Wert</translation>
+        <translation>Wert</translation>
     </message>
 </context>
 </TS>
diff --git a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.en_US.ts b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.en_US.ts
index 24a8264..ddf3a13 100644
--- a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.en_US.ts
+++ b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.en_US.ts
@@ -16,6 +16,34 @@
     </message>
 </context>
 <context>
+    <name>GnuPGInfo</name>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="14"/>
+        <source>GnuPG Info</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="71"/>
+        <source>Version</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="119"/>
+        <source>Components</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="151"/>
+        <source>Directories</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="180"/>
+        <source>Options</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>GnupgTab</name>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
diff --git a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.fr_FR.ts b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.fr_FR.ts
index aa82bd8..4b978d4 100644
--- a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.fr_FR.ts
+++ b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.fr_FR.ts
@@ -7,12 +7,40 @@
         <location filename="../GnuPGInfoGatheringModule.cpp" line="103"/>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="173"/>
         <source>GnuPG</source>
-        <translation type="unfinished">GnuPG</translation>
+        <translation>GnuPG</translation>
     </message>
     <message>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="175"/>
         <source>Information about GnuPG</source>
-        <translation type="unfinished"></translation>
+        <translation>Informations sur GnuPG</translation>
+    </message>
+</context>
+<context>
+    <name>GnuPGInfo</name>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="14"/>
+        <source>GnuPG Info</source>
+        <translation>Info GnuPG</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="71"/>
+        <source>Version</source>
+        <translation>Version</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="119"/>
+        <source>Components</source>
+        <translation>Composants</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="151"/>
+        <source>Directories</source>
+        <translation>Répertoires</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="180"/>
+        <source>Options</source>
+        <translation>Options</translation>
     </message>
 </context>
 <context>
@@ -20,53 +48,53 @@
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Name</source>
-        <translation type="unfinished">Nom</translation>
+        <translation>Nom</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Description</source>
-        <translation type="unfinished">Description</translation>
+        <translation>Description</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Version</source>
-        <translation type="unfinished">Version</translation>
+        <translation>Version</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Checksum</source>
-        <translation type="unfinished">Somme de contrôle</translation>
+        <translation>Somme de contrôle</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Binary Path</source>
-        <translation type="unfinished">Chemin binaire</translation>
+        <translation>Chemin du binaire</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="52"/>
         <source>Components</source>
-        <translation type="unfinished">Composants</translation>
+        <translation>Composants</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="53"/>
         <source>Directories</source>
-        <translation type="unfinished">Annuaires</translation>
+        <translation>Répertoires</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="54"/>
         <source>Options</source>
-        <translation type="unfinished">Options</translation>
+        <translation>Options</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Directory Type</source>
-        <translation type="unfinished">Type de répertoire</translation>
+        <translation>Type de répertoire</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Path</source>
-        <translation type="unfinished">Chemin d&apos;accès</translation>
+        <translation>Chemin</translation>
     </message>
     <message>
         <source>Configurations</source>
@@ -75,27 +103,27 @@
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Component</source>
-        <translation type="unfinished">Composant</translation>
+        <translation>Composant</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Group</source>
-        <translation type="unfinished">Groupe</translation>
+        <translation>Groupe</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Key</source>
-        <translation type="unfinished">Clé</translation>
+        <translation>Clé</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Default Value</source>
-        <translation type="unfinished">Valeur par défaut</translation>
+        <translation>Valeur par défaut</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="97"/>
         <source>Value</source>
-        <translation type="unfinished">Valeur</translation>
+        <translation>Valeur</translation>
     </message>
 </context>
 </TS>
diff --git a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.it_iT.ts b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.it_iT.ts
index c44974a..e2321c5 100644
--- a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.it_iT.ts
+++ b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.it_iT.ts
@@ -16,6 +16,34 @@
     </message>
 </context>
 <context>
+    <name>GnuPGInfo</name>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="14"/>
+        <source>GnuPG Info</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="71"/>
+        <source>Version</source>
+        <translation type="unfinished">Versione</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="119"/>
+        <source>Components</source>
+        <translation type="unfinished">Componenti</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="151"/>
+        <source>Directories</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="180"/>
+        <source>Options</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>GnupgTab</name>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
diff --git a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_CN.ts b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_CN.ts
index a9689b8..624a515 100644
--- a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_CN.ts
+++ b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_CN.ts
@@ -7,12 +7,40 @@
         <location filename="../GnuPGInfoGatheringModule.cpp" line="103"/>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="173"/>
         <source>GnuPG</source>
-        <translation type="unfinished">GnuPG</translation>
+        <translation>GnuPG</translation>
     </message>
     <message>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="175"/>
         <source>Information about GnuPG</source>
-        <translation type="unfinished"></translation>
+        <translation>关于 GnuPG</translation>
+    </message>
+</context>
+<context>
+    <name>GnuPGInfo</name>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="14"/>
+        <source>GnuPG Info</source>
+        <translation>GnuPG 信息</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="71"/>
+        <source>Version</source>
+        <translation>版本</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="119"/>
+        <source>Components</source>
+        <translation>组件</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="151"/>
+        <source>Directories</source>
+        <translation>目录</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="180"/>
+        <source>Options</source>
+        <translation>选项</translation>
     </message>
 </context>
 <context>
@@ -20,78 +48,78 @@
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Name</source>
-        <translation type="unfinished">名称</translation>
+        <translation>名称</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Description</source>
-        <translation type="unfinished">含义</translation>
+        <translation>描述</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Version</source>
-        <translation type="unfinished">版本</translation>
+        <translation>版本</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Checksum</source>
-        <translation type="unfinished">校验和</translation>
+        <translation>校验和</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Binary Path</source>
-        <translation type="unfinished">二进制文件路径</translation>
+        <translation>可执行文件路径</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="52"/>
         <source>Components</source>
-        <translation type="unfinished">组件</translation>
+        <translation>组件</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="53"/>
         <source>Directories</source>
-        <translation type="unfinished">目录</translation>
+        <translation>目录</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="54"/>
         <source>Options</source>
-        <translation type="unfinished">选项</translation>
+        <translation>选项</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Directory Type</source>
-        <translation type="unfinished">目录类型</translation>
+        <translation>目录类型</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Path</source>
-        <translation type="unfinished">路径</translation>
+        <translation>路径</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Component</source>
-        <translation type="unfinished">组件</translation>
+        <translation>组件</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Group</source>
-        <translation type="unfinished">组</translation>
+        <translation>组</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Key</source>
-        <translation type="unfinished">键</translation>
+        <translation>密钥</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Default Value</source>
-        <translation type="unfinished">默认值</translation>
+        <translation>默认值</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="97"/>
         <source>Value</source>
-        <translation type="unfinished">值</translation>
+        <translation>值</translation>
     </message>
 </context>
 </TS>
diff --git a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_TW.ts b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_TW.ts
index 1590d7a..0930e6e 100644
--- a/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_TW.ts
+++ b/src/m_gpg_info/ts/ModuleGnuPGInfoGathering.zh_TW.ts
@@ -7,12 +7,40 @@
         <location filename="../GnuPGInfoGatheringModule.cpp" line="103"/>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="173"/>
         <source>GnuPG</source>
-        <translation type="unfinished">GnuPG</translation>
+        <translation>GnuPG</translation>
     </message>
     <message>
         <location filename="../GnuPGInfoGatheringModule.cpp" line="175"/>
         <source>Information about GnuPG</source>
-        <translation type="unfinished"></translation>
+        <translation>關於 GnuPG</translation>
+    </message>
+</context>
+<context>
+    <name>GnuPGInfo</name>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="14"/>
+        <source>GnuPG Info</source>
+        <translation>GnuPG 資訊</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="71"/>
+        <source>Version</source>
+        <translation>版本</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="119"/>
+        <source>Components</source>
+        <translation>元件</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="151"/>
+        <source>Directories</source>
+        <translation>目錄</translation>
+    </message>
+    <message>
+        <location filename="../GnuPGInfo.ui" line="180"/>
+        <source>Options</source>
+        <translation>選項</translation>
     </message>
 </context>
 <context>
@@ -20,53 +48,53 @@
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Name</source>
-        <translation type="unfinished">姓名</translation>
+        <translation>名稱</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Description</source>
-        <translation type="unfinished">描述</translation>
+        <translation>描述</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="49"/>
         <source>Version</source>
-        <translation type="unfinished">版本</translation>
+        <translation>版本</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Checksum</source>
-        <translation type="unfinished">校驗和</translation>
+        <translation>校驗碼</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="50"/>
         <source>Binary Path</source>
-        <translation type="unfinished">二進制路徑</translation>
+        <translation>執行檔路徑</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="52"/>
         <source>Components</source>
-        <translation type="unfinished">成分</translation>
+        <translation>元件</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="53"/>
         <source>Directories</source>
-        <translation type="unfinished"></translation>
+        <translation>目錄</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="54"/>
         <source>Options</source>
-        <translation type="unfinished"></translation>
+        <translation>選項</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Directory Type</source>
-        <translation type="unfinished"></translation>
+        <translation>目錄類型</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="74"/>
         <source>Path</source>
-        <translation type="unfinished"></translation>
+        <translation>路徑</translation>
     </message>
     <message>
         <source>Configurations</source>
@@ -75,27 +103,27 @@
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Component</source>
-        <translation type="unfinished"></translation>
+        <translation>元件</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Group</source>
-        <translation type="unfinished"></translation>
+        <translation>群組</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="95"/>
         <source>Key</source>
-        <translation type="unfinished">鑰匙</translation>
+        <translation>金鑰</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="96"/>
         <source>Default Value</source>
-        <translation type="unfinished"></translation>
+        <translation>預設值</translation>
     </message>
     <message>
         <location filename="../GnupgTab.cpp" line="97"/>
         <source>Value</source>
-        <translation type="unfinished">價值</translation>
+        <translation>值</translation>
     </message>
 </context>
 </TS>