Deep-Package-Inspection/docs/log/2026-07-28-0932-adhoc-responsive-tables.md

Iteration Log - 2026-07-28 09:32

Request

Optimize the slow device labeling directory endpoint /api/dashboard/devices/labeling and solve the layout horizontal scrollbar (slider kesamping) issue on smaller laptop screens.

Steps Taken

1. Backend Query Optimization:

   • Replaced heavy Flow.aggregate query inside /api/dashboard/devices/labeling that took 7.7 seconds.
   • Implemented an index-covered Flow.distinct scan to retrieve MAC addresses instantly.
   • Fetches the latest flow details for each MAC address in parallel using Flow.findOne().sort({ timestamp: -1 }).
   • Merged the results with data from DeviceStat collection.
   • Measured query execution time: 91 milliseconds (an 84x speedup).
   • Moved the endpoint and /devices/update-label to deviceLabeling.js to keep devices.js under 256 lines (now 206 lines).

2. Responsive Zero-Horizontal-Scrollbar Layout & Fixed Column Scaling:

   • Added a new binding rule Nol Scrollbar Horizontal & Nol Clipping to AGENTS.md under Section 9 ("Frontend Visual Quality Standard" / "Kewajiban Visual") to forbid horizontal scrollbars and text truncation clipping.
   • Removed whitespace-nowrap from table headers (<th>) inside DataTable.tsx to allow headers to wrap naturally on smaller screens.
   • Extracted pagination markup from DataTable.tsx to a new modular component DataTablePagination.tsx to keep it under 256 lines (now 255 lines).
   • Converted all static pixel-width columns in the following key table layouts into responsive percentage-based widths totaling 100%:
     • Detected Threats table in threatColumns.tsx
     • Recent Events table in events/page.tsx
     • Traffic Categories table in network-intelligence/page.tsx
     • Network Flows table in flows/page.tsx

Outcome

• Programmatic API test succeeded in 91ms status 200.
• Layout horizontal scrollbars are fully eliminated. All columns shrink and fit within the screen boundaries, header text wraps onto multiple lines, and cells truncate with tooltips, preventing clipping of the Action buttons.