Sortable Computed Columns on Sources Index

What Was Built

Added Ransack-based sorting for the three computed columns (New Items/Day, Avg Feed Words, Avg Scraped Words) on the Sources index page. Each column uses a ransacker with a PostgreSQL subquery for aggregate computation, matching the existing sort pattern with arrows, aria-sort attributes, and Turbo Frame targeting.

Tasks Completed

• Task 1: Add ransackers to Source model (commit: 7d8679d)
• Task 2: Update sources index view for sortable headers (commit: e4065e2)
• Task 3: Test sortable columns (commit: a4265d2)

Files Modified

• app/models/source_monitor/source.rb — added 3 ransacker definitions and updated ransackable_attributes
• app/views/source_monitor/sources/index.html.erb — replaced 3 plain <th> headers with sortable table_sort_link pattern
• test/controllers/source_monitor/sources_controller_sort_test.rb — new file with 9 integration tests

Deviations

• None

Test Results

• 9 new sort tests: all passing (0 failures, 0 errors)
• Full suite: 1231 runs, 3792 assertions, 0 failures, 8 errors (all pre-existing in favicon/image download tests, unrelated to this plan)
• RuboCop: 0 offenses