build(deps): bump gunicorn from 25.0.3 to 26.0.0 in /src

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 25.0.3 to 26.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](https://github.com/benoitc/gunicorn/compare/25.0.3...26.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 26.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

src/dashboard.py

@@ -335,7 +335,10 @@ def API_AuthenticateLogin():
     totpEnabled = DashboardConfig.GetConfig("Account", "enable_totp")[1]
     totpValid = False
     if totpEnabled:
-        totpValid = pyotp.TOTP(DashboardConfig.GetConfig("Account", "totp_key")[1]).now() == data['totp']
+        totp_code = str(data.get("totp", "")).strip()
+        totpValid = pyotp.TOTP(
+	    DashboardConfig.GetConfig("Account", "totp_key")[1]
+        ).verify(totp_code, valid_window=1)
 
     if (valid
             and data['username'] == DashboardConfig.GetConfig("Account", "username")[1]
@@ -1455,11 +1458,15 @@ def API_Welcome_GetTotpLink():
 @app.post(f'{APP_PREFIX}/api/Welcome_VerifyTotpLink')
 def API_Welcome_VerifyTotpLink():
     data = request.get_json()
-    totp = pyotp.TOTP(DashboardConfig.GetConfig("Account", "totp_key")[1]).now()
-    if totp == data['totp']:
+    totp_code = str(data.get("totp", "")).strip()
+    totpValid = pyotp.TOTP(
+	DashboardConfig.GetConfig("Account", "totp_key")[1]
+    ).verify(totp_code, valid_window=1)
+
+    if totpValid:
         DashboardConfig.SetConfig("Account", "totp_verified", "true")
         DashboardConfig.SetConfig("Account", "enable_totp", "true")
-    return ResponseObject(totp == data['totp'])
+    return ResponseObject(totpValid)
 
 @app.post(f'{APP_PREFIX}/api/Welcome_Finish')
 def API_Welcome_Finish():
@@ -1551,7 +1558,8 @@ def API_Email_Send():
                     subject = Template(data.get('Subject', '')).render(peer=p.toJson(), configurationFile=download)
                     if data.get('IncludeAttachment', False):
                         u = str(uuid4())
-                        attachmentName = f'{u}.conf'
+                        peerName = p.toJson().get('name', '').strip()
+                        attachmentName = f'{peerName if peerName else u}.conf'
                         with open(os.path.join('./attachments', attachmentName,), 'w+') as f:
                             f.write(download['file'])   
                         

src/requirements.txt

@@ -5,7 +5,7 @@ pyotp==2.9.0
 Flask==3.1.2
 flask-cors==6.0.2
 icmplib==3.0.4
-gunicorn==25.0.3
+gunicorn==26.0.0
 requests==2.32.5
 tcconfig==0.30.1
 sqlalchemy==2.0.49