fix(ui): address PR #49 review — 6 warnings + 2 suggestions (#122)

Warnings fixed:
- BBCode injection (line 153): escape [ → [lb] in server text before interpolation
- sort_custom on silent-drop (line 125): sort now only runs on actual insertion/replacement
- clip_contents: add clip_contents=true to MonologueDisplay Control (overflow guard)
- confrontation tick guard (main.gd): _last_confrontation_tick deduplicates same-tick signals
- GameState decoupling: show_monologue() reads lattice_profile once and passes it through
  _show_line() → _build_line_node(); renderer no longer reaches into autoload (D-020)
- Equal-priority eviction: >= tiebreak (was >); FIFO for equal-priority queue overflow

Suggestions fixed:
- Minimum duration clamp: maxf(duration, FADE_IN_SEC + 0.1) — line survives own fade-in
- _label_text bounds check: guard against empty _visible before indexing [0]

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

client/ui/monologue_display.tscn

@@ -13,6 +13,7 @@ anchor_right = 0.55
 anchor_bottom = 0.98
 grow_horizontal = 1
 grow_vertical = 0
+clip_contents = true
 mouse_filter = 2
 script = ExtResource("1_monologue")