feat(export): Replace CSV export with standardized JSON format

- Add contactsToExportJson utility function for standardized data export
- Replace CSV export with JSON format in DataExportSection
- Update file extension and MIME type to application/json
- Remove Dexie-specific export logic in favor of unified SQLite/Dexie approach
- Update success notifications to reflect JSON format
- Add TypeScript interfaces for export data structure

This change improves data portability and standardization by:
- Using a consistent JSON format for data export/import
- Supporting both SQLite and Dexie databases
- Including all contact fields in export
- Properly handling contactMethods as stringified JSON
- Maintaining backward compatibility with existing import tools

Security: No sensitive data exposure, maintains existing access controls

src/db/databaseUtil.ts

@@ -79,13 +79,9 @@ const DEFAULT_SETTINGS: Settings = {
 
 // retrieves default settings
 export async function retrieveSettingsForDefaultAccount(): Promise<Settings> {
-  console.log("[databaseUtil] retrieveSettingsForDefaultAccount");
   const platform = PlatformServiceFactory.getInstance();
   const sql = "SELECT * FROM settings WHERE id = ?";
-  console.log("[databaseUtil] sql", sql);
   const result = await platform.dbQuery(sql, [MASTER_SETTINGS_KEY]);
-  console.log("[databaseUtil] result", JSON.stringify(result, null, 2));
-  console.trace("Trace from [retrieveSettingsForDefaultAccount]");
   if (!result) {
     return DEFAULT_SETTINGS;
   } else {
@@ -103,21 +99,21 @@ export async function retrieveSettingsForDefaultAccount(): Promise<Settings> {
 
 /**
  * Retrieves settings for the active account, merging with default settings
- * 
+ *
  * @returns Promise<Settings> Combined settings with account-specific overrides
  * @throws Will log specific errors for debugging but returns default settings on failure
  */
 export async function retrieveSettingsForActiveAccount(): Promise<Settings> {
-  logConsoleAndDb("[databaseUtil] Starting settings retrieval for active account");
 
   try {
     // Get default settings first
     const defaultSettings = await retrieveSettingsForDefaultAccount();
-    logConsoleAndDb(`[databaseUtil] Retrieved default settings (hasActiveDid: ${!!defaultSettings.activeDid})`);
 
     // If no active DID, return defaults
     if (!defaultSettings.activeDid) {
-      logConsoleAndDb("[databaseUtil] No active DID found, returning default settings");
+      logConsoleAndDb(
+        "[databaseUtil] No active DID found, returning default settings",
+      );
       return defaultSettings;
     }
 
@@ -130,12 +126,17 @@ export async function retrieveSettingsForActiveAccount(): Promise<Settings> {
       );
 
       if (!result?.values?.length) {
-        logConsoleAndDb(`[databaseUtil] No account-specific settings found for ${defaultSettings.activeDid}`);
+        logConsoleAndDb(
+          `[databaseUtil] No account-specific settings found for ${defaultSettings.activeDid}`,
+        );
         return defaultSettings;
       }
 
       // Map and filter settings
-      const overrideSettings = mapColumnsToValues(result.columns, result.values)[0] as Settings;
+      const overrideSettings = mapColumnsToValues(
+        result.columns,
+        result.values,
+      )[0] as Settings;
       const overrideSettingsFiltered = Object.fromEntries(
         Object.entries(overrideSettings).filter(([_, v]) => v !== null),
       );
@@ -151,30 +152,27 @@ export async function retrieveSettingsForActiveAccount(): Promise<Settings> {
         } catch (error) {
           logConsoleAndDb(
             `[databaseUtil] Failed to parse searchBoxes for ${defaultSettings.activeDid}: ${error}`,
-            true
+            true,
           );
           // Reset to empty array on parse failure
           settings.searchBoxes = [];
         }
       }
 
-      logConsoleAndDb(
-        `[databaseUtil] Successfully merged settings for ${defaultSettings.activeDid} ` +
-        `(overrides: ${Object.keys(overrideSettingsFiltered).length})`
-      );
       return settings;
-
     } catch (error) {
       logConsoleAndDb(
         `[databaseUtil] Failed to retrieve account settings for ${defaultSettings.activeDid}: ${error}`,
-        true
+        true,
       );
       // Return defaults on error
       return defaultSettings;
     }
-
   } catch (error) {
-    logConsoleAndDb(`[databaseUtil] Failed to retrieve default settings: ${error}`, true);
+    logConsoleAndDb(
+      `[databaseUtil] Failed to retrieve default settings: ${error}`,
+      true,
+    );
     // Return minimal default settings on complete failure
     return {
       id: MASTER_SETTINGS_KEY,