fix: prevent non-combat room repeated rewards during descent (Issue #382)

- Wrap library XP grant in progress < required guard so completed rooms don't grant XP every tick
- Add early return in treasure room tick when progress >= required to skip loot processing
- Initialize non-combat rooms (library, treasure, recovery) during descent in onEnterRoomDescend
- Add regression test file: non-combat-room-reward-guards.test.ts (8 tests)

docs/circular-deps.txt

@@ -1,5 +1,5 @@
 # Circular Dependencies
-Generated: 2026-06-12T10:30:18.304Z
+Generated: 2026-06-12T10:39:16.751Z
 Found: 4 circular chain(s) — these MUST be fixed before modifying involved files.
 
 1. 1) data/guardian-encounters.ts > data/guardian-procedural.ts

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-06-12T10:30:16.054Z",
+    "generated": "2026-06-12T10:39:14.588Z",
     "description": "Import dependency graph for src/lib/game. Keys are files, values are arrays of files they import.",
     "usage": "To find what a file affects, search for its path in the VALUES. To find what a file depends on, look at its KEY entry."
   },

docs/project-structure.txt

@@ -239,6 +239,7 @@ Mana-Loop/
 │   │   │   │   ├── mana-utils.test.ts
 │   │   │   │   ├── melee-auto-attack.test.ts
 │   │   │   │   ├── melee-defense-bypass.test.ts
+│   │   │   │   ├── non-combat-room-reward-guards.test.ts
 │   │   │   │   ├── pact-utils.test.ts
 │   │   │   │   ├── paused-conversion-dedup.test.ts
 │   │   │   │   ├── persistence.test.ts