fix(ui): address PR #52 review — 10 items across Hoshe, Tyre, Araminta (#535)

Critical: bump PROTOCOL_VERSION 8→9 for conversation_events/ended fields.

Hoshe review:
- Dirty flag (_log_dirty) prevents per-frame O(n) BBCode rebuild
- BBCode injection: _escape_bbcode() replaces [ with [lb] on server text
- D-064 regression: dialogue_active cleared in fade callback, not before
- YAML quoting: remove unnecessary quotes from numeric values

Tyre review:
- Carry-forward for dialogue_response, conversation_events, conversation_ended
  in receive_bytes() — arrays merge, scalar falls through
- pause_requested/unpause_requested signals route through main.gd input
  recording (_pending_record_inputs) for #507 replay determinism
- Fix version comments: dialogue_response is v8 (#305), not v9
- Remove dead _active_overheard dictionary

Araminta review:
- Passive lines: ┃ glyph prefix + _desaturate() for name colours
- Active conversation entries pinned (no timeout), unpinned with timestamp
  reset on conversation end
- _enforce_contrast(): minimum luminance floor for name colour readability
- Simplified 1-on-1 attribution: "Speaker:" instead of "Speaker → You:"

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/scripts/main.gd

@@ -62,6 +62,8 @@ func _ready() -> void:
 		dialogue_box.option_selected.connect(_on_dialogue_option_selected)
 		dialogue_box.dialogue_dismissed.connect(_on_dialogue_dismissed)
 		dialogue_box.confrontation_monologue.connect(_on_confrontation_monologue)
+		dialogue_box.pause_requested.connect(_on_dialogue_pause_requested)
+		dialogue_box.unpause_requested.connect(_on_dialogue_unpause_requested)
 
 	# #496: Print gauntlet session summary on disconnect
 	if gauntlet_hud:
@@ -389,6 +391,20 @@ func _on_confrontation_monologue(text: String, duration: float) -> void:
 	monologue_display.show_monologue(text, duration, 3, true)
 
 
+# D-061: Auto-pause on dialogue open — routed through input recording (#507, Tyre #3)
+func _on_dialogue_pause_requested() -> void:
+	var input := {"action": InputMapper.Action.PAUSE, "timestamp_msec": Time.get_ticks_msec()}
+	SimBridge.send_input(input)
+	_pending_record_inputs.append(input)
+
+
+# D-061: Auto-unpause on dialogue close — routed through input recording (#507, Tyre #3)
+func _on_dialogue_unpause_requested() -> void:
+	var input := {"action": InputMapper.Action.UNPAUSE, "timestamp_msec": Time.get_ticks_msec()}
+	SimBridge.send_input(input)
+	_pending_record_inputs.append(input)
+
+
 # D-064: Handle walk-away → send WalkAway{npc_id} to server
 func _on_dialogue_dismissed() -> void:
 	SimBridge.send_input({