fix: debug panel shows correct max mana using full computeTotalMaxMana

- GameStateDebugSection.tsx: use real prestigeUpgrades, equipment, and
  unified effects instead of empty objects always returning base 100
- GameStateDebug.tsx (legacy): same fix
- Both now compute max mana identically to LeftPanel.tsx

Fixes #242 (closes incorrect #237 - mana wasn't exceeding cap)

docs/circular-deps.txt

@@ -1,4 +1,4 @@
 # Circular Dependencies
-Generated: 2026-05-31T14:13:00.373Z
+Generated: 2026-05-31T18:23:54.984Z
 
 No circular dependencies found. ✅

docs/dependency-graph.json

@@ -1,6 +1,6 @@
 {
   "_meta": {
-    "generated": "2026-05-31T14:12:58.516Z",
+    "generated": "2026-05-31T18:23:53.253Z",
     "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."
   },