refactor: collapse extra fields into expander for cleaner Connection tab

Move TOTP secret, tags, credential profile, KeePassXC button, and template
checkbox into a Gtk.Expander 'Extra options' — collapsed by default.

The Connection tab now shows only essential fields:
  - host, port, user, password (with eye/gen buttons), private key
  - SSH key management frame (for SSH/SFTP)
  - command preview

Secondary fields are one click away in the expander, keeping the dialog
clean for 90% of users while preserving all functionality for power users.

Author: buzzqw

gtk3/session_dialog.py

@@ -272,23 +272,43 @@ def _build_tab_connessione(self) -> Gtk.Widget:
         self._row_user_pwd.pack_start(pwd_box, True, True, 0)
         vbox.pack_start(self._row_user_pwd, False, False, 0)
 
+        # ── Opzioni extra (collassate di default) ──────────────────────
+        self._expander_extra = Gtk.Expander(label=t("sd.extra.expander"))
+        self._expander_extra.set_expanded(False)
+        extra_vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=0)
+        extra_vbox.set_margin_start(4); extra_vbox.set_margin_end(4)
+        extra_vbox.set_margin_top(4)
+
         self.entry_totp_secret = _entry(placeholder="JBSWY3DPEHPK3PXP (opzionale)")
         self.entry_totp_secret.set_tooltip_text(t("tt.totp_secret"))
         self._row_totp = self._conn_row(t("sd.totp_secret") + ":", self.entry_totp_secret)
-        vbox.pack_start(self._row_totp, False, False, 0)
+        extra_vbox.pack_start(self._row_totp, False, False, 0)
 
         self.entry_tags = _entry(placeholder="es. prod,database,critico")
         self.entry_tags.set_tooltip_text(t("tt.tags"))
         self._row_tags = self._conn_row(t("sd.tags") + ":", self.entry_tags)
-        vbox.pack_start(self._row_tags, False, False, 0)
+        extra_vbox.pack_start(self._row_tags, False, False, 0)
 
         self.combo_credential_profile = Gtk.ComboBoxText()
         self.combo_credential_profile.append("", t("sd.cred.from_session"))
         self.combo_credential_profile.append("ask", t("sd.cred.ask"))
         self._refresh_credential_profiles()
         self.combo_credential_profile.set_tooltip_text(t("tt.credential_profile"))
         self._row_credential_profile = self._conn_row(t("settings.cred.edit_title") + ":", self.combo_credential_profile)
-        vbox.pack_start(self._row_credential_profile, False, False, 0)
+        extra_vbox.pack_start(self._row_credential_profile, False, False, 0)
+
+        self._btn_keepass = Gtk.Button(label=t("sd.keepass.btn"))
+        self._btn_keepass.set_tooltip_text(t("tt.keepass_btn"))
+        self._btn_keepass.connect("clicked", lambda b: self._on_keepass_fetch())
+        self._row_keepass = self._conn_row("", self._btn_keepass)
+        extra_vbox.pack_start(self._row_keepass, False, False, 2)
+
+        self.chk_is_template = _check(t("sd.template.checkbox"))
+        self.chk_is_template.set_tooltip_text(t("tt.template_checkbox"))
+        extra_vbox.pack_start(self.chk_is_template, False, False, 4)
+
+        self._expander_extra.add(extra_vbox)
+        vbox.pack_start(self._expander_extra, False, False, 0)
 
         pkey_box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=4)
         self.entry_pkey = _entry()
@@ -415,17 +435,6 @@ def _build_tab_connessione(self) -> Gtk.Widget:
         self._row_exec_cmd = self._conn_row(t("sd.exec.cmd"), self.entry_exec_cmd)
         vbox.pack_start(self._row_exec_cmd, False, False, 0)
 
-        # Bottone KeePassXC (user + password)
-        self._btn_keepass = Gtk.Button(label=t("sd.keepass.btn"))
-        self._btn_keepass.set_tooltip_text(t("tt.keepass_btn"))
-        self._btn_keepass.connect("clicked", lambda b: self._on_keepass_fetch())
-        self._row_keepass = self._conn_row("", self._btn_keepass)
-        vbox.pack_start(self._row_keepass, False, False, 0)
-
-        self.chk_is_template = _check(t("sd.template.checkbox"))
-        self.chk_is_template.set_tooltip_text(t("tt.template_checkbox"))
-        vbox.pack_start(self.chk_is_template, False, False, 8)
-
         # ── Anteprima comando ───────────────────────────────────────────
         self._cmd_preview_frame = Gtk.Frame(label=t("sd.cmd_preview_title"))
         self._cmd_preview_frame.set_label_align(0.02, 0.5)

gtk3/translations.py

@@ -758,6 +758,7 @@ def init_from_settings() -> None:
     "sd.template.label":    {"it": "Template:",           "en": "Template:",             "de": "Vorlage:",              "fr": "Modèle :",              "es": "Plantilla:"},
     "sd.template.none":     {"it": "(nessun template)",   "en": "(no template)",         "de": "(keine Vorlage)",       "fr": "(aucun modèle)",        "es": "(sin plantilla)"},
     "sd.template.checkbox": {"it": "💠 Usa come template", "en": "💠 Use as template",  "de": "💠 Als Vorlage verwenden", "fr": "💠 Utiliser comme modèle", "es": "💠 Usar como plantilla"},
+    "sd.extra.expander":    {"it": "⚙ Opzioni extra",  "en": "⚙ Extra options",  "de": "⚙ Zusätzliche Optionen", "fr": "⚙ Options supplémentaires", "es": "⚙ Opciones extra"},
     "sd.tab.tunnel":   {"it": "Tunnel",          "en": "Tunnel",         "de": "Tunnel",         "fr": "Tunnel",           "es": "Túnel"},
     "sd.grp.ssh_open": {"it": "Apertura SSH:",   "en": "SSH open mode:", "de": "SSH-Öffnung:",   "fr": "Ouverture SSH :",  "es": "Apertura SSH:"},
     "sd.grp.sftp_open":{"it": "Apertura SFTP:",  "en": "SFTP open mode:","de": "SFTP-Öffnung:",  "fr": "Ouverture SFTP :", "es": "Apertura SFTP:"},