fix: Apply pact affinity cast speed bonus to all spell casts (AC-13)

Previously the pact affinity cast speed bonus was only applied to invocation
spells. Per spec §6.2 and §10.2, it should apply to ALL spell casts (active,
equipment, and invocation).

Changes:
- invocation-utils.ts: Added computeAttackSpeedMultFromPactAffinity() helper
  that combines prestige upgrade + discipline bonus and applies the diminishing
  returns formula
- gameStore.ts: Compute total pact affinity (prestige + discipline) and apply
  cast speed bonus to attackSpeedMult passed to processCombatTick
- combat-actions.ts: Use attackSpeedMult directly for active/equipment spell cast
  progress (bonus already baked in)
- combat-invocation.ts: Use attackSpeedMult directly for invocation cast progress
  (bonus already baked in), removed redundant pactAffinity parameter

docs/circular-deps.txt

@@ -1,5 +1,5 @@
 # Circular Dependencies
-Generated: 2026-06-13T11:02:39.214Z
+Generated: 2026-06-13T11:42:23.525Z
 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": "2026-06-13T11:02:37.078Z",
+    "generated": "2026-06-13T11:42:21.085Z",
     "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."
   },
@@ -555,6 +555,8 @@
       "data/guardian-encounters.ts",
       "effects/discipline-effects.ts",
       "stores/combat-damage.ts",
+      "stores/combat-invocation.ts",
+      "stores/combat-melee.ts",
       "stores/combat-state.types.ts",
       "stores/dot-runtime.ts",
       "stores/golem-combat-actions.ts",
@@ -581,6 +583,24 @@
       "stores/prestigeStore.ts",
       "utils/spire-utils.ts"
     ],
+    "stores/combat-invocation.ts": [
+      "constants.ts",
+      "data/guardian-encounters.ts",
+      "effects/discipline-effects.ts",
+      "stores/combat-damage.ts",
+      "stores/combat-state.types.ts",
+      "types.ts",
+      "utils/index.ts",
+      "utils/invocation-utils.ts"
+    ],
+    "stores/combat-melee.ts": [
+      "constants.ts",
+      "data/guardian-encounters.ts",
+      "stores/combat-damage.ts",
+      "stores/combat-state.types.ts",
+      "types.ts",
+      "utils/index.ts"
+    ],
     "stores/combat-reset.ts": [
       "stores/combat-actions.ts",
       "stores/combat-state.types.ts",
@@ -589,7 +609,8 @@
       "utils/spire-utils.ts"
     ],
     "stores/combat-state.types.ts": [
-      "types.ts"
+      "types.ts",
+      "utils/invocation-utils.ts"
     ],
     "stores/combatStore.ts": [
       "data/guardian-encounters.ts",
@@ -934,6 +955,13 @@
       "utils/result.ts",
       "utils/safe-persist.ts"
     ],
+    "utils/invocation-utils.ts": [
+      "constants/spells.ts",
+      "data/guardian-encounters.ts",
+      "types.ts",
+      "utils/combat-utils.ts",
+      "utils/mana-utils.ts"
+    ],
     "utils/mana-utils.ts": [
       "constants.ts",
       "data/attunements.ts",