feat: NTE gear optimizer web app

Client-side optimizer for Neverness to Everness console builds. Imports a
gear export from nte-history-exporter, keeps it in IndexedDB, and solves for
the best module placement per character or across a team.

- domain/: pure ports of the Python research scripts (shapes, cartridges,
  board tiling, stats, scoring, set bonuses, Arc effects, sheet prediction).
  No DOM, no storage imports, so they stay worker-safe and Node-testable.
- solver/: single-character solve with branch and bound, plus a three-phase
  team solve (portfolio, leximin, column generation) over disjoint item sets.
  Runs in a Worker when one can be constructed, inline otherwise.
- db/: three storage tiers selected by use rather than feature detection,
  fail-closed import validation, and undo that restores both sides of a steal.
- ui/: React 19 views for items, characters and teams; the board is drawn as
  the deliverable rather than a score.
- Two build targets: a hosted bundle and a single self-contained nte.html
  with no external requests.

Values the model cannot measure are reported as unavailable rather than
guessed: cartridge set bonuses, the level 80 base-stat multiplier, and the
distinction between "optimal for this packing" and globally optimal.

145 tests, tsc clean, both build targets clean.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

data-src/set-bonuses.json

@@ -0,0 +1,127 @@
+{
+ "format": "nte-set-bonuses",
+ "format_version": 1,
+ "note": "Bonus VALUES are not in any capture and not on everness: items.json carries only the cartridge boxes. Each tier stays unknown until read in game or scraped, and an unknown tier contributes nothing rather than a guessed number.",
+ "sets": {
+  "Crimson: Twin Butterflies": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Devil's Blood: Curse": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Diabolos": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Fireflies and the Forest": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Kingdom's Guard": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Lost Radiance": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Quiet Manor": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Shadow Creed": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Speedy Hedgehog": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Street Boxer": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Thea's Night Tavern": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  },
+  "Tiny Big Adventure": {
+   "2": {
+    "unknown": true,
+    "stats": []
+   },
+   "4": {
+    "unknown": true,
+    "stats": []
+   }
+  }
+ }
+}