Add dedicated "Synced" tab to sidebar for synchronized conversations

[Copilot]

Overview

This PR adds a new "Synced" tab to the frontend sidebar that displays only synchronized or monitored conversations, providing clear separation from the existing Users, Groups, and Channels tabs which show all available Telegram dialogs.

Problem

Previously, the sidebar showed all Telegram dialogs grouped by type (Users/Groups/Channels), but there was no way to quickly identify which conversations had been synchronized to the local database and had searchable message history. This made it difficult for users to distinguish between:

• Chats with full search capabilities (synced to database)
• Chats that are merely available in Telegram

Additionally, both the Telegram API (dialog:fetch) and database (storage:fetch:dialogs) were writing to the same chats array, causing data conflicts.

Solution

Data Architecture

Implemented clean separation of data sources:

• chats[]: All available dialogs from Telegram API (fresh, up-to-date)
• syncedChats[]: Only synchronized chats from database (with searchable history)

UI Changes

Added a fourth tab to the sidebar:

[🗄️ Synced] [👤 Users] [👥 Groups] [💬 Channels]

The new "Synced" tab:

• Shows only chats stored in the joined_chats table
• Uses a database icon for visual distinction
• Set as the default tab for better UX
• Fully internationalized (English: "Synced", Chinese: "已同步")

Smart Search Logic

Enhanced the getChat(id) function with priority-based search:

1. First searches in chats[] (Telegram API - most current data)
2. Falls back to syncedChats[] (Database - handles archived/deleted chats)

This ensures users always see the freshest chat information while maintaining access to historical synced conversations.

Technical Details

Files Modified: 7 files (+39, -6 lines)

Key changes:

• packages/client/src/stores/useChat.ts: Added syncedChats ref and dual-source initialization
• packages/client/src/event-handlers/storage.ts: Routed database events to syncedChats
• apps/web/src/layouts/default.vue: Added new tab UI and filtering logic
• Translations: Added chatGroups.synced key in both English and Chinese

Benefits

• ✅ Clear visual distinction between synced and available chats
• ✅ Quick access to chats with searchable message history
• ✅ Better default view for new users
• ✅ Resolves data conflict between API and database sources
• ✅ Maintains backward compatibility (purely additive change)

Testing

• ✅ TypeScript compilation passes
• ✅ ESLint linting passes
• ✅ CodeQL security scan (0 alerts)
• ✅ All code review issues addressed

Screenshots

(Note: Screenshots blocked by network restrictions in development environment. The UI adds a new tab with database icon "🗄️ Synced" positioned as the leftmost tab in the chat groups section.)

Closes #[issue-number] (if applicable)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fonts.googleapis.com
  • Triggering command: node /home/REDACTED/work/telegram-search/telegram-search/node_modules/.bin/../vite/bin/vite.js build (dns block)
  • Triggering command: node /home/REDACTED/work/telegram-search/telegram-search/node_modules/.bin/../vite/bin/vite.js --port 3333 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

前端侧边栏需要一个单独的列来展示已经同步或者监听的对话，和联系人、群、频道并列。

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