fix: allow dot character in entity names for UI and backend validation

Bulk import accepted dots in frontend/backend/server names but UI and
backend validators rejected them with ^[a-zA-Z0-9_-]+$. After import,
entities with dots could not be edited. HAProxy itself allows dots in
section names, so the regex is expanded to ^[a-zA-Z0-9_.-]+$ across
all 12 validation points (5 React form rules, 1 ACL char-strip,
3 Pydantic validators, 1 WAF validator, 2 config-validator warnings).

backend/models/frontend.py

@@ -108,8 +108,8 @@ class FrontendConfig(BaseModel):
             raise ValueError('Frontend name cannot be empty')
         
         # HAProxy names cannot contain spaces or special characters
-        if not re.match(r'^[a-zA-Z0-9_-]+$', v.strip()):
-            raise ValueError('Frontend name can only contain letters, numbers, underscore (_) and dash (-). Spaces and special characters are not allowed.')
+        if not re.match(r'^[a-zA-Z0-9_.-]+$', v.strip()):
+            raise ValueError('Frontend name can only contain letters, numbers, dot (.), underscore (_) and dash (-). Spaces and special characters are not allowed.')
         
         if len(v.strip()) > 50:
             raise ValueError('Frontend name cannot exceed 50 characters')
@@ -147,8 +147,8 @@ class FrontendConfig(BaseModel):
     
     @validator('default_backend')
     def validate_default_backend(cls, v):
-        if v and not re.match(r'^[a-zA-Z0-9_-]+$', v.strip()):
-            raise ValueError('Default backend name can only contain letters, numbers, underscore (_) and dash (-)')
+        if v and not re.match(r'^[a-zA-Z0-9_.-]+$', v.strip()):
+            raise ValueError('Default backend name can only contain letters, numbers, dot (.), underscore (_) and dash (-)')
         return v.strip() if v else None
     
     @validator('ssl_certificate_id')
@@ -288,7 +288,7 @@ class FrontendConfig(BaseModel):
                 continue
                 
             # Basic ACL syntax validation
-            if not re.match(r'^[a-zA-Z0-9_-]+\s+', rule):
+            if not re.match(r'^[a-zA-Z0-9_.-]+\s+', rule):
                 raise ValueError(f'Invalid ACL rule syntax: "{rule}". Must start with ACL name followed by condition.')
             
             # Check for dangerous patterns

backend/models/waf.py

@@ -22,8 +22,8 @@ class WAFRule(BaseModel):
             raise ValueError('WAF rule name cannot be empty')
         
         # HAProxy ACL names cannot contain spaces or special characters
-        if not re.match(r'^[a-zA-Z0-9_-]+$', v.strip()):
-            raise ValueError('WAF rule name can only contain letters, numbers, underscore (_) and dash (-). Spaces and special characters are not allowed.')
+        if not re.match(r'^[a-zA-Z0-9_.-]+$', v.strip()):
+            raise ValueError('WAF rule name can only contain letters, numbers, dot (.), underscore (_) and dash (-). Spaces and special characters are not allowed.')
         
         if len(v.strip()) > 50:
             raise ValueError('WAF rule name cannot exceed 50 characters')

backend/utils/haproxy_validator.py

@@ -156,11 +156,11 @@ class HAProxyConfigValidator:
             section_name = parts[1]
             
             # Check name format
-            if not re.match(r'^[a-zA-Z0-9_-]+$', section_name):
+            if not re.match(r'^[a-zA-Z0-9_.-]+$', section_name):
                 self._add_result(
                     ValidationLevel.WARNING,
                     f"Section name '{section_name}' contains invalid characters",
-                    suggestion="Use only letters, numbers, underscore and hyphen"
+                    suggestion="Use only letters, numbers, dot, underscore and hyphen"
                 )
         
         # Set current section for validation
@@ -265,12 +265,12 @@ class HAProxyConfigValidator:
         server_addr = args[1]
         
         # Check server name format
-        if not re.match(r'^[a-zA-Z0-9_-]+$', server_name):
+        if not re.match(r'^[a-zA-Z0-9_.-]+$', server_name):
             self._add_result(
                 ValidationLevel.WARNING,
                 f"Server name '{server_name}' contains invalid characters",
                 directive="server",
-                suggestion="Use only letters, numbers, underscore and hyphen"
+                suggestion="Use only letters, numbers, dot, underscore and hyphen"
             )
         
         # Check address format

frontend/src/components/ACLRuleBuilder.js

@@ -313,7 +313,7 @@ function ACLDefinitionCard({ rule, index, onChange, onDelete }) {
         <Col flex="140px">
           <Input
             value={rule.name}
-            onChange={(e) => onChange(index, { ...rule, name: e.target.value.replace(/[^a-zA-Z0-9_-]/g, '') })}
+            onChange={(e) => onChange(index, { ...rule, name: e.target.value.replace(/[^a-zA-Z0-9_.-]/g, '') })}
             placeholder="acl_name"
             size="small"
             addonBefore={<FilterOutlined style={{ fontSize: 11 }} />}

frontend/src/components/BackendServers.js

@@ -1646,7 +1646,7 @@ const BackendServers = () => {
                 label="Backend Name"
                 rules={[
                   { required: true, message: 'Please enter backend name' },
-                  { pattern: /^[a-zA-Z0-9_-]+$/, message: 'Only alphanumeric, underscore and dash allowed' }
+                  { pattern: /^[a-zA-Z0-9_.-]+$/, message: 'Only alphanumeric, dot, underscore and dash allowed' }
                 ]}
               >
                 <Input placeholder="e.g., web_servers" />
@@ -1939,7 +1939,7 @@ const BackendServers = () => {
                 label="Server Name"
                 rules={[
                   { required: true, message: 'Please enter server name' },
-                  { pattern: /^[a-zA-Z0-9_-]+$/, message: 'Only alphanumeric, underscore and dash allowed' }
+                  { pattern: /^[a-zA-Z0-9_.-]+$/, message: 'Only alphanumeric, dot, underscore and dash allowed' }
                 ]}
               >
                 <Input placeholder="e.g., web1" />

frontend/src/components/FrontendManagement.js

@@ -1381,7 +1381,7 @@ const FrontendManagement = () => {
                     extra="Unique identifier for this frontend"
                     rules={[
                       { required: true, message: 'Please enter frontend name' },
-                      { pattern: /^[a-zA-Z0-9_-]+$/, message: 'Only alphanumeric, underscore and dash allowed' }
+                      { pattern: /^[a-zA-Z0-9_.-]+$/, message: 'Only alphanumeric, dot, underscore and dash allowed' }
                     ]}
                   >
                     <Input placeholder="e.g., main_frontend" />

frontend/src/components/SSLManagement.js

@@ -934,7 +934,7 @@ const SSLManagement = () => {
                 label="Certificate Name"
                 rules={[
                   { required: true, message: 'Please enter certificate name' },
-                  { pattern: /^[a-zA-Z0-9_-]+$/, message: 'Only alphanumeric, underscore and dash allowed' }
+                  { pattern: /^[a-zA-Z0-9_.-]+$/, message: 'Only alphanumeric, dot, underscore and dash allowed' }
                 ]}
                 extra={selectedCertificate && selectedCertificate.id ? "Certificate name cannot be changed (used as file path on servers)" : "Used as file path: /etc/ssl/haproxy/{name}.pem"}
                 tooltip={selectedCertificate && selectedCertificate.id ? "Certificate name is immutable after creation to maintain file system references" : null}

frontend/src/components/WAFManagement.js

@@ -1442,7 +1442,7 @@ const WAFManagement = () => {
                 label="Rule Name"
                 rules={[
                   { required: true, message: 'Please enter rule name' },
-                  { pattern: /^[a-zA-Z0-9_-]+$/, message: 'Only alphanumeric, underscore and dash allowed' }
+                  { pattern: /^[a-zA-Z0-9_.-]+$/, message: 'Only alphanumeric, dot, underscore and dash allowed' }
                 ]}
               >
                 <Input placeholder="e.g., api_rate_limit" />