Expedition autopilot Phase 4 + rogue sneak attack + TwinBee voice sweep

Tedium-removal pass driven by live play feedback. Three big threads:

Expedition autopilot Phase 4 — background auto-run + harvest-until-dry:
- New expeditionAutoRunTicker walks active expeditions every 15min
  (5min tick, per-expedition CAS on new last_autorun_at column). Skips
  combat sessions, briefing/recap quiet windows, expeditions <30min old.
- Walks up to 3 rooms/tick with compact narration; suppresses DMs when
  0 rooms walked or just hitting the per-tick cap (no "stretch complete"
  filler). Player only hears from the bot when a real decision is needed.
- Compact mode: one-line combat narration for trash/elite, auto-resolves
  elite doorways via the forward-sim engine (boss still pauses). Threaded
  via new advanceOnceWithOpts → resolveRoom → resolveCombatRoom.
- Auto-harvest now grinds each Common/Uncommon node until dry (cap at 8
  attempts/visit), mirroring manual !scavenge retries. Rare+ still pauses.
- Ambient ticker: anti-repeat by Kind via new last_ambient_kind column
  (avoids two pack_rat DMs in a row when the pool only has 6 lines).
- !expedition go <n> now routes to the fork-choice handler when active +
  numeric; fork footer rewritten to suggest !expedition go instead of
  !zone go. Boss/Elite doorway: formatNextRoomMessage routes the action
  hint by next room type and autopilot loop breaks via new nextRoomType
  field so "Room X/Y — Boss" doesn't double-print with contradictory
  hints (!zone advance vs !fight).
- runAutopilotWalk extracted from expeditionCmdRun so foreground and
  background share the loop body.

Rogue Sneak Attack actually exists now:
- Audit found the rogue's "Sneak Attack" passive was AutoCritFirst +
  5% damage rider. No Nd6, ever. Phase 2 Monte Carlo masked this
  with a small flat buff; the class's defining mechanic never matched
  its tooltip or 5e identity.
- Added SneakAttackDie int to CombatModifiers, per-hit Nd6 in
  combat_primitives.go (same lane as DivineStrikePerHit). Scales with
  level: 1d6 at L1-2 ... 4d6 at L7-8 ... capped at 10d6 at L19-20.
- AutoCritFirst + 5% rider retained as bonuses on top of working sneak
  attack — preserves the opener-burst feel.
- L7 rogue expected per-hit ~8 → ~22 damage. Valdris fight math goes
  from "16 rounds to kill, die in 8" to winnable.

TwinBee voice sweep (Phase B3):
- ~530 line changes across 24 files replacing third-person "TwinBee
  notes/files/tracks/respects/..." constructions with first-person
  inside flavor string literals. Code identifiers (TwinBeeLine,
  twinBeeLine, etc.), chat-prefix labels (🎭 **TwinBee:**), item names
  (TwinBee's Bell), achievements, and game-title references in
  fun.go (Konami TwinBee ship) left intact.
- Catches a real bug: Valdris fight rendered "TwinBee marks the
  Legendary Resistance" mid-combat in third person, contradicting
  the Phase B2 convention.

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

internal/plugin/adventure_twinbee.go

@@ -202,7 +202,7 @@ func (p *AdventurePlugin) selectTwinBeeFlavor(result *TwinBeeResult) string {
 	}
 
 	if len(pool) == 0 {
-		return "TwinBee went to " + result.Location.Name + ". Results pending."
+		return "I went to " + result.Location.Name + ". Results pending."
 	}
 
 	text := pool[rand.IntN(len(pool))]
@@ -330,13 +330,13 @@ type twinBeeGiftDef struct {
 }
 
 var twinBeeGifts = []twinBeeGiftDef{
-	{"success_chance", "TwinBee's Lucky Star ⭐", 10, 24 * time.Hour, "TwinBee sends a star. They have many stars. Use it well."},
+	{"success_chance", "TwinBee's Lucky Star ⭐", 10, 24 * time.Hour, "I send a star. They have many stars. Use it well."},
 	{"death_chance", "Bec's Blessing 🐝", -5, 48 * time.Hour, "Bec has blessed you. Bec does not do this lightly. Don't die."},
 	{"loot_quality", "WinBee's Coin 🪙", 15, 24 * time.Hour, "WinBee flipped this coin and it came up you. Lucky."},
 	{"mining_success", "Goemon's Pipe 🎋", 8, 48 * time.Hour, "Borrowed from Goemon. Return not expected. Results expected."},
 	{"foraging_death", "Pentarou's Feather 🪶", -10, 24 * time.Hour, "Pentarou parted with this reluctantly. They like you enough. Mostly."},
 	{"xp_multiplier", "TwinBee's Bell Fragment 🔔", 5, 48 * time.Hour, "A piece of the Bell. It rings when you're doing well. It will ring."},
-	{"exceptional_chance", "Power Up Pod 🫛", 50, 48 * time.Hour, "TwinBee found extras. This is not a common occurrence. Don't waste it."},
+	{"exceptional_chance", "Power Up Pod 🫛", 50, 48 * time.Hour, "I found extras. This is not a common occurrence. Don't waste it."},
 }
 
 const twinBeeGiftChance = 0.15