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/dnd_subclass.go

@@ -84,57 +84,57 @@ var dndSubclassRegistry = []DnDSubclassInfo{
 	// Fighter
 	{SubclassChampion, ClassFighter, "Champion",
 		"Raw power, brutal efficiency.",
-		"You've chosen the old way. No tricks, no systems. Just you, and the blade, and the next hit. TwinBee approves of this directness."},
+		"You've chosen the old way. No tricks, no systems. Just you, and the blade, and the next hit. I approve of this directness."},
 	{SubclassBattleMaster, ClassFighter, "Battle Master",
 		"Tactical superiority, maneuver control.",
-		"Maneuvers, dice, control of the engagement. TwinBee notes that the smartest fighter in the room rarely throws the first punch."},
+		"Maneuvers, dice, control of the engagement. I note that the smartest fighter in the room rarely throws the first punch."},
 	{SubclassBerserker, ClassFighter, "Berserker",
 		"Rage-fueled destruction, high risk/reward.",
-		"Rage as a tool, exhaustion as a tax. TwinBee files this under 'load-bearing recklessness'."},
+		"Rage as a tool, exhaustion as a tax. I file this under 'load-bearing recklessness'."},
 
 	// Rogue
 	{SubclassThief, ClassRogue, "Thief",
 		"Speed, opportunism, fast hands.",
-		"Quick fingers, quicker exits. TwinBee suspects the locks of the world have been put on notice."},
+		"Quick fingers, quicker exits. I suspect the locks of the world have been put on notice."},
 	{SubclassAssassin, ClassRogue, "Assassin",
 		"Setup and execution; devastating openers.",
-		"Patience, then violence, then nothing. TwinBee respects the economy of motion."},
+		"Patience, then violence, then nothing. I respect the economy of motion."},
 	{SubclassArcaneTrickster, ClassRogue, "Arcane Trickster",
 		"Stealth plus a slice of Mage spellcasting.",
-		"Magic in the hands of a Rogue. TwinBee considers this the universe's way of apologizing for giving you low HP."},
+		"Magic in the hands of a Rogue. I consider this the universe's way of apologizing for giving you low HP."},
 
 	// Mage
 	{SubclassEvocation, ClassMage, "Evocation",
 		"Pure damage output. The glass cannon perfected.",
-		"You picked the path of the louder spell. TwinBee finds this aesthetically pleasing and structurally alarming."},
+		"You picked the path of the louder spell. I find this aesthetically pleasing and structurally alarming."},
 	{SubclassAbjuration, ClassMage, "Abjuration",
 		"Wards, shields, counterspells.",
-		"You'd rather not get hit, and you've made it your specialty. TwinBee approves of this kind of foresight."},
+		"You'd rather not get hit, and you've made it your specialty. I approve of this kind of foresight."},
 	{SubclassNecromancy, ClassMage, "Necromancy",
 		"Control undead and drain life.",
-		"Undeath as a tool rather than a state. TwinBee has opinions about this. TwinBee is keeping them to itself."},
+		"Undeath as a tool rather than a state. I have opinions about this. I am keeping them to itself."},
 
 	// Cleric
 	{SubclassLifeDomain, ClassCleric, "Life Domain",
 		"Maximum healing output. Party support anchor.",
-		"Healing as discipline, not afterthought. TwinBee notes the party will live longer because of you, whether they thank you or not."},
+		"Healing as discipline, not afterthought. I note the party will live longer because of you, whether they thank you or not."},
 	{SubclassWarDomain, ClassCleric, "War Domain",
 		"Combat Cleric — extra attacks, martial weapons.",
-		"You came to fight, not to mediate. TwinBee finds this clarifying."},
+		"You came to fight, not to mediate. I find this clarifying."},
 	{SubclassTrickeryDomain, ClassCleric, "Trickery Domain",
 		"Illusion, misdirection, chaos.",
-		"A Cleric who lies for a living. TwinBee delights in the implied theological complications."},
+		"A Cleric who lies for a living. I delight in the implied theological complications."},
 
 	// Ranger
 	{SubclassHunter, ClassRanger, "Hunter",
 		"Zone specialist; bonuses against enemy types.",
-		"You read the terrain before you draw the bow. TwinBee finds this professionalism rare and welcome."},
+		"You read the terrain before you draw the bow. I find this professionalism rare and welcome."},
 	{SubclassBeastMaster, ClassRanger, "Beast Master",
 		"Deep Ranger–pet bond. Pet as combat partner.",
-		"You and your pet, all the way down. TwinBee finds this genuinely moving and declines to be embarrassed about that."},
+		"You and your pet, all the way down. I find this genuinely moving and decline to be embarrassed about that."},
 	{SubclassGloomStalker, ClassRanger, "Gloom Stalker",
 		"Darkness specialist. Exceptional underground.",
-		"You were already good in the dark. Now you're better. TwinBee notes: the Underdark is waiting."},
+		"You were already good in the dark. Now you're better. I note: the Underdark is waiting."},
 
 	// Druid — Open5e caster scaffold
 	{SubclassCircleLand, ClassDruid, "Circle of the Land",