grim7/12/2026, 10:36:24 PM

Match the owner's Paper design for the grouped activity sections: a stack shows
its FIRST 10 entries contiguously, the tail fades under a bottom progressive blur
with a 'show more (N)' pill (N = hidden count) that reveals the rest inline.
Replaces the first+~3-middle+last sampling with a plain first-10 + show-more; no
pagination. Blur layers ([1,2,4,8]px, masked at 22% steps) and pill styling
unchanged — they already matched the design.

Checks: typecheck, biome, boundaries, 204 tests.

Parent8f297cc