fix(dashboard): symmetric tile widths, BP back to two tiles

Marc's v1.4.3 feedback:
  - Tiles end up the same height now but uneven widths — they should
    distribute symmetrically across the strip.
  - BP shouldn't be one combined tile; sys + dia should sit side by
    side as two distinct tiles like every other metric.

Two fixes:

1. **Strip wrapper switches from `shrink-0 grow basis-[10rem]` to
   `flex-1 basis-0 min-w-[9rem]`.** With `basis-[10rem]` the floor
   was 160 px, and tiles whose content rendered wider (the combined
   BP tile rendering "117.0/79.0 mmHg" plus a paired avg row) pushed
   past their share, breaking symmetry. `flex-1 basis-0` starts every
   tile from zero, so the row-width gets divided evenly regardless of
   how much text each card contains. `min-w-[9rem]` is the readable
   floor — if the row no longer fits at that width, the parent's
   existing `overflow-x-auto` lets the user swipe instead of wrap.

2. **BP renders as two tiles again.** Reverted the v1.4.3 combined
   `secondary` rendering: the dashboard now pushes a `bp-sys` and
   a `bp-dia` entry, ordered with a 0.001 sub-step so dia stays
   immediately after sys without colliding with the next widget's
   integer order. The `secondary` prop on TrendCard stays in the
   API for callers that *do* want a paired-value tile.

Tests + typecheck green (671/671).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "healthlog",
-  "version": "1.4.3",
+  "version": "1.4.4",
   "private": true,
   "packageManager": "pnpm@10.31.0",
   "scripts": {