feat(core): add table actions (edit, pause, delete confirmation) and global action log

- Add Edit and Pause/Resume actions to connections table
- Add delete confirmation modal to secrets table
- Add 'paused' status to connections with full backend support
- Skip paused connections in health checks and secrets scanning
- Add global ActionLog service with filesystem persistence
- Instrument all mutation handlers (connections, secrets, pipelines) with action logging
- Add Action Log view with entity type filtering to dashboard

ts/classes/connectionmanager.ts

@@ -38,6 +38,7 @@ export class ConnectionManager {
    */
   private async testAllConnections(): Promise<void> {
     for (const conn of this.connections) {
+      if (conn.status === 'paused') continue;
       try {
         const provider = this.getProvider(conn.id);
         const result = await provider.testConnection();
@@ -178,10 +179,22 @@ export class ConnectionManager {
     logger.info(`Connection deleted: ${id}`);
   }
 
+  async pauseConnection(id: string, paused: boolean): Promise<interfaces.data.IProviderConnection> {
+    const conn = this.connections.find((c) => c.id === id);
+    if (!conn) throw new Error(`Connection not found: ${id}`);
+    conn.status = paused ? 'paused' : 'disconnected';
+    await this.persistConnection(conn);
+    logger.info(`Connection ${paused ? 'paused' : 'resumed'}: ${conn.name}`);
+    return { ...conn, token: '***' };
+  }
+
   async testConnection(id: string): Promise<{ ok: boolean; error?: string }> {
+    const conn = this.connections.find((c) => c.id === id)!;
+    if (conn.status === 'paused') {
+      return { ok: false, error: 'Connection is paused' };
+    }
     const provider = this.getProvider(id);
     const result = await provider.testConnection();
-    const conn = this.connections.find((c) => c.id === id)!;
     conn.status = result.ok ? 'connected' : 'error';
     await this.persistConnection(conn);
     return result;