feat(ugc): processing totals on the UGC page; no shared icon preset for player models

- IUgc::GetUgcProcessTotals sums what the UGC server made, for models and
  for car and rocket builds: count, time spent (and how many are timed),
  CPU time, average and slowest, average and most memory (estimate),
  bricks, triangles and triangles saved (models whose count before hidden
  face removal is known). /api/ugc returns them as totals and the UGC page
  shows a card for each kind. Parity tested.
- Player models no longer have a shared icon preset: every one is a
  different size and shape, so its icon is fitted to it from the settings.
  The UGC server ignores a kind:model preset, the dashboard refuses to save
  one, and the icon editor hides the type buttons for models. One model's
  own icon values still work. Car and rocket build types keep theirs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dDatabase/GameDatabase/ITables/IUgc.h

@@ -123,6 +123,24 @@ public:
 	// How many models are in each state
 	virtual std::vector<std::pair<eProcessState, uint64_t>> GetUgcProcessCounts() = 0;
 
+	// Sums over the made items (is_optimized 1) of the model table, or of the car and rocket builds (`modular`; they
+	// have no bricks or triangles). Items made before a stat was recorded have 0 for it and are left out of its averages
+	// and of the triangles saved.
+	struct ProcessTotals {
+		uint64_t made{};
+		uint64_t timed{};          // made ones with a recorded time
+		uint64_t milliseconds{};   // wall time, summed
+		uint64_t cpuMilliseconds{};
+		uint64_t maxMilliseconds{};
+		uint64_t memoryKbAverage{}; // estimate
+		uint64_t memoryKbMax{};
+		uint64_t bricks{};
+		uint64_t triangles{};
+		uint64_t trianglesBefore{}; // of the models whose count before hidden-face removal is known
+		uint64_t trianglesAfter{};  // the same models' after
+	};
+	virtual ProcessTotals GetUgcProcessTotals(const bool modular) = 0;
+
 	// ---- Checksums of the files the UGC server made (ugc_file_checksums), for the client's manifest requests ----
 
 	// What the files are stored under: a player model's ugc id, or a combination of car or rocket modules