Add quick_ideas skill and job for Quick dinners (Feature 18)

quick_ideas v1 suggests Quick dinners of one kind, crockpot or under30,
from the household context, never returning a name already shown: the
exclude list is checked against normalized names with harness.Similar.
POST /api/v1/ideas/quick {kind, exclude[]} validates both fields (no
default kind) and answers 202 {jobId}; the quick_ideas job asks for 12
ideas, grounds them through the same GroundEach rounds as
ideas_from_ingredients and keeps up to 6 whose grounded recipe is of the
kind (crockpot: method crockpot; under30: minutes_total <= 30), so the
model's estimate never decides. Fewer survivors make a shorter page,
never a padded one.

The grounding loop, failure clearing and failed-result view are now
shared generic helpers used by both idea jobs rather than a second copy.

Maestro task 243a6812-f52b-4215-a4a2-8eb599914f7e.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/ai/skills/prompts/checksums.txt

@@ -7,3 +7,4 @@ suggest_side_quests v1 bd54d7bf9aea0980059a346e5f40ff4c866b80ef9bb9f74e7cbd413be
 draft_week v1 e637419690d9532bab53cb8ca01b73a079ecfe8e3022522c05188d18e9740f32
 archive_title v1 b4f30562a8614dac09a69d512dc361883b917ee4228a0ce3b4583c7fd3f6101a
 ideas_from_ingredients v1 49df3e134f07fe2c0dbbda7bd3d7d1364731e5851bf6f6a526ec04b703480924
+quick_ideas v1 c78d1b9917a150bcf8df1351e0b4c2e76eaa10097819782c2c74695b0ae3cf05