feat(dashboard): implement bot settings page with partial updates and serialization fixes

shared/lib/config.ts

@@ -1,3 +1,4 @@
+import { jsonReplacer } from './utils';
 import { readFileSync, existsSync, writeFileSync } from 'node:fs';
 import { join } from 'node:path';
 import { z } from 'zod';
@@ -191,14 +192,7 @@ export function saveConfig(newConfig: unknown) {
     // Validate and transform input
     const validatedConfig = configSchema.parse(newConfig);
 
-    const replacer = (key: string, value: any) => {
-        if (typeof value === 'bigint') {
-            return value.toString();
-        }
-        return value;
-    };
-
-    const jsonString = JSON.stringify(validatedConfig, replacer, 4);
+    const jsonString = JSON.stringify(validatedConfig, jsonReplacer, 4);
     writeFileSync(configPath, jsonString, 'utf-8');
     reloadConfig();
 }

shared/lib/utils.ts

@@ -9,3 +9,42 @@ import type { Command } from "./types";
 export function createCommand(command: Command): Command {
     return command;
 }
+
+/**
+ * JSON Replacer function for serialization
+ * Handles safe serialization of BigInt values to strings
+ */
+export const jsonReplacer = (_key: string, value: unknown): unknown => {
+    if (typeof value === 'bigint') {
+        return value.toString();
+    }
+    return value;
+};
+
+/**
+ * Deep merge utility
+ */
+export function deepMerge(target: any, source: any): any {
+    if (typeof target !== 'object' || target === null) {
+        return source;
+    }
+    if (typeof source !== 'object' || source === null) {
+        return source;
+    }
+
+    const output = { ...target };
+
+    Object.keys(source).forEach(key => {
+        if (source[key] && typeof source[key] === 'object' && !Array.isArray(source[key])) {
+            if (!(key in target)) {
+                Object.assign(output, { [key]: source[key] });
+            } else {
+                output[key] = deepMerge(target[key], source[key]);
+            }
+        } else {
+            Object.assign(output, { [key]: source[key] });
+        }
+    });
+
+    return output;
+}