fix: animation stutter, resolution crash, memory cap, spell tooltip hints, GO collision

- Animation stutter: skip playAnimation(Run) for the local player in the
  server movement callback — the player renderer state machine already manages
  it; resetting animTime on every movement packet caused visible stutter
- Resolution crash: reorder swapchain recreation so old swapchain is only
  destroyed after confirming the new build succeeded; add null-swapchain
  guard in beginFrame to survive the retry window
- Memory cap: reduce cache budget from 80% uncapped to 50% hard-capped at
  16 GB to prevent excessive RAM use on high-memory systems
- Spell tooltip: suppress "Drag to action bar / Double-click to cast" hints
  when the tooltip is shown from the action bar (showUsageHints=false)
- M2 collision: add watermelon/melon/squash/gourd to foliage (no-collision);
  exclude chair/bench/stool/seat/throne from smallSolidProp so invisible chair
  bounding boxes no longer trap the player

include/ui/spellbook_screen.hpp

@@ -94,8 +94,8 @@ private:
     VkDescriptorSet getSpellIcon(uint32_t iconId, pipeline::AssetManager* assetManager);
     const SpellInfo* getSpellInfo(uint32_t spellId) const;
 
-    // Tooltip rendering helper
-    void renderSpellTooltip(const SpellInfo* info, game::GameHandler& gameHandler);
+    // Tooltip rendering helper (showUsageHints=false when called from action bar)
+    void renderSpellTooltip(const SpellInfo* info, game::GameHandler& gameHandler, bool showUsageHints = true);
 };
 
 } // namespace ui