feat(insights): full-width category items with more space

Inside "Alert categories" and "Watch list", the category cards are now a
full-width single-column stack instead of a narrow multi-column grid, with
more breathing room (larger gap, roomier headers + ticket rows, taller
expanded list). Each card was already a click-to-expand accordion and
remains so — CSS-only, index.tsx unchanged. The section-level collapse from
2.3.1 still works (.grid[hidden] preserved).

- Insights.module.scss: .grid grid -> flex column (gap 16); cardHead
  padding 16/20; cardTitle 14px; row padding 8/20; list max-height 440
- bump 2.3.1 -> 2.3.2 (root + client), CHANGELOG [2.3.2]
- engineer artifact + INDEX; verifier-log PASS entry

verifier PASS: reproduced tsc + vite build + npm test 9/9; confirmed
flex-column + .grid[hidden] collapse in compiled CSS; no row-grid
regression; no new dependency.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VEsaHQx8cXr1hFrKU42UK6

CHANGELOG.md

@@ -4,6 +4,16 @@ All notable changes to **FORGE** are documented here.
 Format based on [Keep a Changelog](https://keepachangelog.com/); this project uses
 [Semantic Versioning](https://semver.org/).
 
+## [2.3.2] — 2026-08-29
+
+### Changed
+- **PM Insights — full-width category items.** Inside **Alert categories** and
+  **Watch list**, each category is now a **full-width accordion** stacked in a single
+  column (was a narrow multi-column grid), with more breathing room: larger inter-card
+  gap, roomier card headers and ticket rows, and a taller expanded list. The click-to-
+  expand behaviour per category is unchanged. (CSS-only: the `.grid` becomes a flex
+  column; `.cardHead`/`.row` padding widened.)
+
 ## [2.3.1] — 2026-08-29
 
 ### Changed