Spiritual Weapon: own channel + narration; rest blocked mid-zone

Spiritual Weapon used to ride the pet-attack channel, so a petless
cleric saw "🐾 Your faithful companion" each round and couldn't tell
the spell was firing. Split it to SpiritWeaponProc/Dmg with its own
✨ flavor; damage now scales with spell mod + upcast.

Rest also fired mid-dungeon — only the autorun honored RestingUntil,
the !rest commands themselves had no gate. Block both short and long
rest when an expedition or combat session is active.

internal/plugin/combat_narrative.go

@@ -236,6 +236,9 @@ func renderEvent(e CombatEvent, playerName, enemyName string, result CombatResul
 	case "pet_attack":
 		return fmt.Sprintf(pickRand(narrativePetAttack), e.Damage)
 
+	case "spirit_weapon_strike":
+		return fmt.Sprintf(pickRand(narrativeSpiritWeapon), e.Damage)
+
 	case "pet_deflect":
 		return pickRand(narrativePetDeflect)
 
@@ -526,6 +529,13 @@ var narrativePetAttack = []string{
 	"🐾 Your faithful companion lands a hit for %d damage. More faithful than accurate, but today both applied.",
 }
 
+var narrativeSpiritWeapon = []string{
+	"✨ The spectral mace swings on its own and lands for %d damage. Floating menace, well-balanced.",
+	"✨ Your spiritual weapon hovers, picks an angle, strikes — %d damage. No grip, all conviction.",
+	"✨ A glowing weapon arcs in from beside you. %d damage. The enemy keeps trying to track it. Cannot.",
+	"✨ The spectral blade flickers, then bites. %d damage. It does not tire. It does not blink.",
+}
+
 var narrativePetDeflect = []string{
 	"🐾 Your pet intercepts the blow. Damage halved. Your pet is now your best piece of equipment.",
 	"🐾 Your pet pushes you aside at the last second. Impact reduced. You did not ask to be pushed. Results speak for themselves.",