Remove dialogue tone-of-voice system, add Gitea Actions full build, add venue cycling

- Delete Rules.Tone/TONE_NAMES, NpcProfile.tone_modifiers, tone params on
  NPCController.roll_reaction/apply_player_action; dialogue_lines flattened
  to Array[String]; HUD tone label, T binding, and hud.tone_prefix removed
- Docs updated everywhere (PLAN, README, DONE, MEMORY); PLAN section heading
  'Tone and Design Direction' -> 'Design Direction'
- Add .gitea/workflows/build.yml: checks job (import+tests) on push/PR; full
  build job (export templates, Linux/Windows/macOS exports, artifact upload,
  and tag-based Gitea release publish via GITEA_TOKEN) on tags/dispatch
- Remove old .github/workflows/ci.yml to avoid double runs
- Add venue cycling (V) across all three scenarios with hud.venue_switched
- Refresh README screenshots to match the new HUD
- 53/53 tests pass, boot smoke clean

src/core/npc_controller.gd

@@ -8,7 +8,7 @@ const FSM := preload("res://src/core/fsm.gd")
 ## reaction logic. The presentation layer adds a visual avatar and navigation.
 ## RefCounted on purpose: headless tests and CI do not need a scene tree.
 
-signal interacted(level: int, tone: int)
+signal interacted(level: int)
 
 var npc_id: String = ""
 var profile: NpcProfile = null
@@ -61,15 +61,10 @@ func _build_fsm(initial_state: String) -> void:
 	fsm.add_transition("THREATENING", "FORCING_ENTRY")
 	fsm.start(initial_state)
 
-func roll_reaction(level: int, tone: int) -> int:
-	## Weighted pick from profile's reaction table for `level`, adjusted for tone.
+func roll_reaction(level: int) -> int:
+	## Weighted pick from profile's reaction table for `level`.
 	highest_escalation_received = maxi(highest_escalation_received, level)
 	var weights: Dictionary = profile.pickup_reactions_per_level(level).duplicate()
-	var tone_mod: float = profile.tone_modifiers.get(tone, 0.0)
-	if tone_mod > 0.0 and weights.has(Rules.Reaction.COMPLY):
-		# Shift weight mass toward compliance proportionally.
-		var transferable: float = float(weights[Rules.Reaction.COMPLY]) * tone_mod
-		weights[Rules.Reaction.COMPLY] += transferable * 0.5
 	var roll_value := rng.randf()
 	var total := 0.0
 	for key in weights.keys():
@@ -83,16 +78,15 @@ func roll_reaction(level: int, tone: int) -> int:
 			return key
 	return Rules.Reaction.LEAVE
 
-func apply_player_action(level: int, tone: int) -> Dictionary:
+func apply_player_action(level: int) -> Dictionary:
 	## Returns reaction to the player's action and updates FSM when needed.
-	var performed_reaction := roll_reaction(level, tone)
+	var performed_reaction := roll_reaction(level)
 	reaction = performed_reaction
 	reaction_set = true
 	_update_state_for_reaction(performed_reaction)
 	return {
 		"npc_id": npc_id,
 		"level_used": level,
-		"tone": tone,
 		"reaction": performed_reaction,
 		"reaction_name": Rules.Reaction.find_key(performed_reaction),
 		"new_state": fsm.current_state,