feat(Chat): implement chat incident reporting feature

- Added reportChatIncident method in ChatController to handle reporting of chat incidents.
- Introduced a new API route for reporting incidents in chatRouter.
- Implemented chatService methods to ensure the chat report table is created and to handle incident data storage.
- Enhanced frontend components to allow users to report incidents in both multi and random chat dialogs.
- Updated internationalization files to include new strings for reporting functionality in multiple languages.

backend/services/chatService.js

@@ -18,6 +18,108 @@ class ChatService {
     this.channel = null;
     this.amqpAvailable = false;
     this.initRabbitMq();
+    this._chatReportTableEnsured = false;
+  }
+
+  async _ensureChatReportTable() {
+    if (this._chatReportTableEnsured) return;
+    await Room.sequelize.query(`
+      CREATE TABLE IF NOT EXISTS community.chat_report (
+        id bigserial PRIMARY KEY,
+        context varchar(40) NOT NULL,
+        reporter_hashed_id varchar(255) NULL,
+        reporter_random_id varchar(255) NULL,
+        reporter_username varchar(255) NULL,
+        offender_hashed_id varchar(255) NULL,
+        offender_random_id varchar(255) NULL,
+        offender_username varchar(255) NULL,
+        incident_at timestamptz NOT NULL,
+        chat_history jsonb NOT NULL,
+        metadata jsonb NULL,
+        created_at timestamptz NOT NULL DEFAULT NOW()
+      );
+    `);
+    await Room.sequelize.query(`
+      CREATE INDEX IF NOT EXISTS chat_report_created_idx
+      ON community.chat_report (created_at DESC);
+    `);
+    this._chatReportTableEnsured = true;
+  }
+
+  _normalizeChatHistory(history) {
+    if (!Array.isArray(history)) return [];
+    return history.slice(0, 1500).map((entry) => {
+      if (!entry || typeof entry !== 'object') {
+        return { text: String(entry || '').slice(0, 3000) };
+      }
+      return {
+        type: String(entry.type || '').slice(0, 40),
+        user: String(entry.user || '').slice(0, 255),
+        text: String(entry.text || '').slice(0, 3000),
+        timestamp: entry.timestamp || null,
+      };
+    });
+  }
+
+  async reportChatIncident(payload) {
+    await this._ensureChatReportTable();
+    const context = String(payload.context || '').trim();
+    if (!['random_chat', 'multi_chat', 'one_to_one'].includes(context)) {
+      throw new Error('invalid_context');
+    }
+    const incidentAt = payload.incidentAt ? new Date(payload.incidentAt) : new Date();
+    if (Number.isNaN(incidentAt.getTime())) {
+      throw new Error('invalid_incident_at');
+    }
+    const chatHistory = this._normalizeChatHistory(payload.chatHistory);
+    if (!chatHistory.length) {
+      throw new Error('empty_chat_history');
+    }
+    const metadata = payload.metadata && typeof payload.metadata === 'object' ? payload.metadata : null;
+    const rows = await Room.sequelize.query(
+      `
+      INSERT INTO community.chat_report (
+        context,
+        reporter_hashed_id,
+        reporter_random_id,
+        reporter_username,
+        offender_hashed_id,
+        offender_random_id,
+        offender_username,
+        incident_at,
+        chat_history,
+        metadata
+      ) VALUES (
+        :context,
+        :reporterHashedId,
+        :reporterRandomId,
+        :reporterUsername,
+        :offenderHashedId,
+        :offenderRandomId,
+        :offenderUsername,
+        :incidentAt,
+        CAST(:chatHistory AS jsonb),
+        CAST(:metadata AS jsonb)
+      )
+      RETURNING id, context, incident_at AS "incidentAt", created_at AS "createdAt"
+      `,
+      {
+        replacements: {
+          context,
+          reporterHashedId: payload.reporterHashedId || null,
+          reporterRandomId: payload.reporterRandomId || null,
+          reporterUsername: payload.reporterUsername || null,
+          offenderHashedId: payload.offenderHashedId || null,
+          offenderRandomId: payload.offenderRandomId || null,
+          offenderUsername: payload.offenderUsername || null,
+          incidentAt: incidentAt.toISOString(),
+          chatHistory: JSON.stringify(chatHistory),
+          metadata: metadata ? JSON.stringify(metadata) : null,
+        },
+        type: Room.sequelize.QueryTypes.SELECT
+      }
+    );
+    return rows[0];
   }
 
   initRabbitMq() {