Adv 2.0 D&D layer: Phases 1-8 + Phase 9 SP1+SP2

Combines all uncommitted D&D work into one checkpoint:

Phases 1-8 (per gogobee_dnd_session_summary.md):
- Race/class/stats system, !setup flow, !sheet, !respec
- d20-vs-AC combat with race/class passives, auto-migration
- XP/level-up, skill checks, NPC refund hooks
- Equipment slot mapping, rarity, !rest short/long
- Pre-arm active abilities, resource pools
- Bestiary, !roll/!stats/!level, onboarding DM
- Audit fixes A-I, flavor wiring under internal/flavor/
- Phase 8 weapon dice + armor AC tables (gogobee_equipment_appendix)

Phase 9 SP1 — spell system foundations:
- 79 SpellDefinitions (76 in-scope + 3 reaction-deferred)
- dnd_known_spells, dnd_spell_slots tables
- pending_cast / concentration_* columns on dnd_character
- Slot tables for Mage/Cleric/Ranger, DC + attack-bonus math
- Long-rest refreshes slots; respec wipes spell state
- Auto-grant default known list on !setup confirm and auto-migration

Phase 9 SP2 — !cast / !spells / !prepare commands:
- Out-of-combat HEAL and UTILITY resolve immediately
- Damage/control/buff queue as pending_cast for next combat
- Audit-style save-then-debit, slot refund on save failure
- !cast --drop, concentration supersession, prep-cap enforcement
- Reaction spells refused with Phase 11 note

SP3 (combat-time resolution of pending_cast) and SP4 (full prep/learn
tests) are next. Build clean, full test suite green.

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

internal/plugin/adventure_flavor_babysit.go

@@ -28,6 +28,17 @@ var babysitDiaperLines = []string{
 	"The diapers. They happened. They were handled. Moving on.",
 }
 
+// babysitHighlightLines fire on auto-babysit days when the haul was unusually
+// good — making the babysitter feel like a companion rather than a silent
+// insurance product. Each line takes one %s slot for the focused skill name.
+var babysitHighlightLines = []string{
+	"The babysitter says your kid was a natural at %s today. They want it noted.",
+	"Solid day on the %s circuit, apparently. The babysitter looked smug about it.",
+	"Whatever the babysitter did with your %s gear — it worked. The numbers don't lie.",
+	"The babysitter handed in a %s haul and said nothing. The smug silence said plenty.",
+	"Your kid is, against the odds, getting alarmingly good at %s under TwinBee's care.",
+}
+
 // pickBabysitFlavor returns a random entry from the given pool.
 func pickBabysitFlavor(pool []string) string {
 	if len(pool) == 0 {