fix: remove dead code, restore Redis default, add Codable backward compat

Author: datlechin

Plugins/TableProPluginKit/ConnectionField.swift

@@ -104,4 +104,20 @@ public struct ConnectionField: Codable, Sendable {
         self.section = section
         self.hidesPassword = hidesPassword
     }
+
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        id = try container.decode(String.self, forKey: .id)
+        label = try container.decode(String.self, forKey: .label)
+        placeholder = try container.decodeIfPresent(String.self, forKey: .placeholder) ?? ""
+        isRequired = try container.decodeIfPresent(Bool.self, forKey: .isRequired) ?? false
+        defaultValue = try container.decodeIfPresent(String.self, forKey: .defaultValue)
+        fieldType = try container.decode(FieldType.self, forKey: .fieldType)
+        section = try container.decodeIfPresent(FieldSection.self, forKey: .section) ?? .advanced
+        hidesPassword = try container.decodeIfPresent(Bool.self, forKey: .hidesPassword) ?? false
+    }
+
+    private enum CodingKeys: String, CodingKey {
+        case id, label, placeholder, isRequired, defaultValue, fieldType, section, hidesPassword
+    }
 }

TablePro/Views/Connection/ConnectionFormView.swift

@@ -105,13 +105,6 @@ struct ConnectionFormView: View {
         additionalFieldValues["usePgpass"] == "true"
     }
 
-    private var usePgpassBinding: Binding<Bool> {
-        Binding(
-            get: { additionalFieldValues["usePgpass"] == "true" },
-            set: { additionalFieldValues["usePgpass"] = $0 ? "true" : "false" }
-        )
-    }
-
     // Pre-connect script
     @State private var preConnectScript: String = ""
 
@@ -939,7 +932,7 @@ struct ConnectionFormView: View {
             groupId: selectedGroupId,
             safeModeLevel: safeModeLevel,
             aiPolicy: aiPolicy,
-            redisDatabase: Int(additionalFieldValues["redisDatabase"] ?? ""),
+            redisDatabase: Int(additionalFieldValues["redisDatabase"] ?? "0"),
             startupCommands: startupCommands.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
                 ? nil : startupCommands,
             additionalFields: finalAdditionalFields.isEmpty ? nil : finalAdditionalFields
@@ -1088,7 +1081,7 @@ struct ConnectionFormView: View {
             color: connectionColor,
             tagId: selectedTagId,
             groupId: selectedGroupId,
-            redisDatabase: Int(additionalFieldValues["redisDatabase"] ?? ""),
+            redisDatabase: Int(additionalFieldValues["redisDatabase"] ?? "0"),
             startupCommands: startupCommands.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
                 ? nil : startupCommands,
             additionalFields: finalAdditionalFields.isEmpty ? nil : finalAdditionalFields