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.

1 files changed, 102 insertions, 62 deletions

diff --git a/src/m_key_server_sync/ts/ModuleKeyServerSync.it_IT.ts b/src/m_key_server_sync/ts/ModuleKeyServerSync.it_IT.ts
index 75e942e..6406062 100644
--- a/src/m_key_server_sync/ts/ModuleKeyServerSync.it_IT.ts
+++ b/src/m_key_server_sync/ts/ModuleKeyServerSync.it_IT.ts
@@ -4,23 +4,23 @@
 <context>
     <name>GTrC</name>
     <message>
-        <location filename="../KeyServerSyncModule.cpp" line="+88"/>
+        <location filename="../KeyServerSyncModule.cpp" line="88"/>
         <source>The following email addresses have status:
 </source>
-        <translation type="unfinished"></translation>
+        <translation>I seguenti indirizzi email hanno lo stato:</translation>
     </message>
     <message>
-        <location line="+10"/>
+        <location filename="../KeyServerSyncModule.cpp" line="98"/>
         <source>Could not parse status information.</source>
-        <translation type="unfinished"></translation>
+        <translation>Impossibile analizzare le informazioni sullo stato.</translation>
     </message>
     <message>
-        <location line="+7"/>
+        <location filename="../KeyServerSyncModule.cpp" line="105"/>
         <source>Public Key Upload Successful</source>
-        <translation type="unfinished"></translation>
+        <translation>Caricamento della chiave pubblica riuscito</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../KeyServerSyncModule.cpp" line="106"/>
         <source>The public key was successfully uploaded to the key server keys.openpgp.org.
 Fingerprint: %1
 
@@ -28,149 +28,189 @@ Fingerprint: %1
 Please check your email (%3) for further verification from keys.openpgp.org.
 
 Note: For verification, you can find more information here: https://keys.openpgp.org/about</source>
-        <translation type="unfinished"></translation>
+        <translation>La chiave pubblica è stata caricata con successo sul server delle chiavi keys.openpgp.org.
+Impronta digitale: %1
+
+%2
+Controlla la tua email (%3) per ulteriori verifiche da keys.openpgp.org.
+
+Nota: Per la verifica, puoi trovare maggiori informazioni qui: https://keys.openpgp.org/about</translation>
     </message>
     <message>
-        <location line="+18"/>
+        <location filename="../KeyServerSyncModule.cpp" line="124"/>
         <source>Key Upload Failed</source>
-        <translation type="unfinished"></translation>
+        <translation>Caricamento della chiave pubblica fallito</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../KeyServerSyncModule.cpp" line="125"/>
         <source>Failed to upload public key to the server.
 Fingerprint: %1
 Error: %2</source>
-        <translation type="unfinished"></translation>
+        <translation>Impossibile caricare la chiave pubblica sul server.
+Impronta digitale: %1
+Errore: %2</translation>
     </message>
     <message>
-        <location line="+32"/>
+        <location filename="../KeyServerSyncModule.cpp" line="157"/>
         <source>Key Update Failed</source>
-        <translation type="unfinished"></translation>
+        <translation>Aggiornamento della chiave fallito</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../KeyServerSyncModule.cpp" line="158"/>
         <source>Failed to retrieve public key from the server.
 Key ID: %1
 Error: %2</source>
-        <translation type="unfinished"></translation>
+        <translation>Impossibile recuperare la chiave pubblica dal server.
+ID chiave: %1
+Errore: %2</translation>
     </message>
     <message>
-        <location line="+52"/>
+        <location filename="../KeyServerSyncModule.cpp" line="210"/>
         <source>Key Server</source>
-        <translation type="unfinished"></translation>
+        <translation>Server delle chiavi</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../KeyServerSyncModule.cpp" line="211"/>
         <source>Import public keys from a trusted key server.</source>
-        <translation type="unfinished"></translation>
+        <translation>Importa chiavi pubbliche da un server delle chiavi attendibile.</translation>
     </message>
     <message>
-        <location line="+48"/>
+        <location filename="../KeyServerSyncModule.cpp" line="259"/>
         <source>Key Server Operations</source>
-        <translation type="unfinished"></translation>
+        <translation>Operazioni del server delle chiavi</translation>
     </message>
     <message>
-        <location line="+5"/>
+        <location filename="../KeyServerSyncModule.cpp" line="264"/>
         <source>Publish Public Key to Key Server</source>
-        <translation type="unfinished"></translation>
+        <translation>Pubblica chiave pubblica sul server delle chiavi</translation>
     </message>
     <message>
-        <location line="+8"/>
+        <location filename="../KeyServerSyncModule.cpp" line="272"/>
         <source>Refresh Public Key From Key Server</source>
-        <translation type="unfinished"></translation>
+        <translation>Aggiorna chiave pubblica dal server delle chiavi</translation>
     </message>
 </context>
 <context>
     <name>SearchKeyDialog</name>
     <message>
-        <location filename="../SearchKeyDialog.cpp" line="+66"/>
+        <location filename="../SearchKeyDialog.cpp" line="66"/>
         <source>Key ID</source>
-        <translation type="unfinished"></translation>
+        <translation>ID chiave</translation>
     </message>
     <message>
-        <location line="+0"/>
+        <location filename="../SearchKeyDialog.cpp" line="66"/>
         <source>UID</source>
-        <translation type="unfinished"></translation>
+        <translation>UID</translation>
     </message>
     <message>
-        <location line="+0"/>
+        <location filename="../SearchKeyDialog.cpp" line="66"/>
         <source>Creation Date</source>
-        <translation type="unfinished"></translation>
+        <translation>Data di creazione</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../SearchKeyDialog.cpp" line="67"/>
         <source>Expiration Date</source>
-        <translation type="unfinished"></translation>
+        <translation>Data di scadenza</translation>
     </message>
     <message>
-        <location line="+0"/>
+        <location filename="../SearchKeyDialog.cpp" line="67"/>
         <source>Algorithm</source>
-        <translation type="unfinished"></translation>
+        <translation>Algoritmo</translation>
     </message>
     <message>
-        <location line="+0"/>
+        <location filename="../SearchKeyDialog.cpp" line="67"/>
         <source>Key Size</source>
-        <translation type="unfinished"></translation>
+        <translation>Dimensione chiave</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../SearchKeyDialog.cpp" line="68"/>
         <source>Status</source>
-        <translation type="unfinished"></translation>
+        <translation>Stato</translation>
     </message>
     <message>
-        <location line="+3"/>
+        <location filename="../SearchKeyDialog.cpp" line="71"/>
         <source>By Key ID</source>
-        <translation type="unfinished"></translation>
+        <translation>Per ID chiave</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../SearchKeyDialog.cpp" line="72"/>
         <source>By Email</source>
-        <translation type="unfinished"></translation>
+        <translation>Per email</translation>
     </message>
     <message>
-        <location line="+1"/>
+        <location filename="../SearchKeyDialog.cpp" line="73"/>
         <source>By Fingerprint</source>
-        <translation type="unfinished"></translation>
+        <translation>Per impronta digitale</translation>
     </message>
     <message>
-        <location line="+35"/>
+        <location filename="../SearchKeyDialog.cpp" line="108"/>
         <source>Search value is empty.</source>
-        <translation type="unfinished"></translation>
+        <translation>Il valore di ricerca è vuoto.</translation>
     </message>
     <message>
-        <location line="+16"/>
+        <location filename="../SearchKeyDialog.cpp" line="124"/>
         <source>Key server URL is empty.</source>
-        <translation type="unfinished"></translation>
+        <translation>L&apos;URL del server delle chiavi è vuoto.</translation>
     </message>
     <message>
-        <location line="+9"/>
+        <location filename="../SearchKeyDialog.cpp" line="133"/>
         <source>Invalid key server URL format.</source>
-        <translation type="unfinished"></translation>
+        <translation>Formato dell&apos;URL del server delle chiavi non valido.</translation>
     </message>
     <message>
-        <location line="+13"/>
+        <location filename="../SearchKeyDialog.cpp" line="146"/>
         <source>Invalid email format.</source>
-        <translation type="unfinished"></translation>
+        <translation>Formato dell&apos;email non valido.</translation>
     </message>
     <message>
-        <location line="+13"/>
+        <location filename="../SearchKeyDialog.cpp" line="159"/>
         <source>Invalid fingerprint format. It should be a hex string of length 16 or 40.</source>
-        <translation type="unfinished"></translation>
+        <translation>Formato dell&apos;impronta digitale non valido. Deve essere una stringa esadecimale di lunghezza 16 o 40.</translation>
     </message>
     <message>
-        <location line="+14"/>
+        <location filename="../SearchKeyDialog.cpp" line="173"/>
         <source>Invalid Key ID format. It should be a hex string of length 8 or 16.</source>
-        <translation type="unfinished"></translation>
+        <translation>Formato dell&apos;ID chiave non valido. Deve essere una stringa esadecimale di lunghezza 8 o 16.</translation>
     </message>
     <message>
-        <location line="+6"/>
+        <location filename="../SearchKeyDialog.cpp" line="179"/>
         <source>Unknown search type.</source>
-        <translation type="unfinished"></translation>
+        <translation>Tipo di ricerca sconosciuto.</translation>
     </message>
     <message>
-        <location line="+110"/>
+        <location filename="../SearchKeyDialog.cpp" line="289"/>
         <source>No GPG context is available.</source>
-        <translation type="unfinished"></translation>
+        <translation>Contesto GPG non disponibile.</translation>
+    </message>
+    <message>
+        <location filename="../SearchKeyDialog.ui" line="14"/>
+        <source>Search Keys</source>
+        <translation>Cerca chiavi</translation>
+    </message>
+    <message>
+        <location filename="../SearchKeyDialog.ui" line="36"/>
+        <source>Key Server</source>
+        <translation>Server delle chiavi</translation>
+    </message>
+    <message>
+        <location filename="../SearchKeyDialog.ui" line="56"/>
+        <source>Search Type</source>
+        <translation>Tipo di ricerca</translation>
+    </message>
+    <message>
+        <location filename="../SearchKeyDialog.ui" line="66"/>
+        <source>Search Value</source>
+        <translation>Valore di ricerca</translation>
+    </message>
+    <message>
+        <location filename="../SearchKeyDialog.ui" line="85"/>
+        <source>Search</source>
+        <translation>Cerca</translation>
+    </message>
+    <message>
+        <location filename="../SearchKeyDialog.ui" line="105"/>
+        <source>Tips: double click to import the selected key.</source>
+        <translation>Suggerimento: fai doppio clic per importare la chiave selezionata.</translation>
     </message>
 </context>
 </TS>