Phase 4: Mana Flow effects

src/lib/game/hooks/useGameDerived.ts

@@ -63,8 +63,13 @@ export function useManaStats() {
     ? Math.floor(maxMana / 100) * 0.1
     : 0;
   
+  // Mana Waterfall bonus
+  const manaWaterfallBonus = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_WATERFALL)
+    ? Math.floor(maxMana / 100) * 0.25
+    : 0;
+  
   // Final effective regen
-  const effectiveRegen = (effectiveRegenWithSpecials + manaCascadeBonus) * meditationMultiplier;
+  const effectiveRegen = (effectiveRegenWithSpecials + manaCascadeBonus + manaWaterfallBonus) * meditationMultiplier;
   
   return {
     upgradeEffects,
@@ -75,11 +80,16 @@ export function useManaStats() {
     incursionStrength,
     effectiveRegenWithSpecials,
     manaCascadeBonus,
+    manaWaterfallBonus,
     effectiveRegen,
     hasSteadyStream: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.STEADY_STREAM),
     hasManaTorrent: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_TORRENT),
     hasDesperateWells: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.DESPERATE_WELLS),
     hasManaEcho: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_ECHO),
+    hasManaWaterfall: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_WATERFALL),
+    hasFlowSurge: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.FLOW_SURGE),
+    hasManaOverflow: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_OVERFLOW),
+    hasEternalFlow: hasSpecial(upgradeEffects, SPECIAL_EFFECTS.ETERNAL_FLOW),
   };
 }
 

src/lib/game/store.ts

@@ -720,6 +720,7 @@ function makeInitial(overrides: Partial<GameState> = {}): GameState {
 
     log: ['✨ The loop begins. You start with a Basic Staff (Mana Bolt) and civilian clothes. Gather your strength, mage.'],
     loopInsight: 0,
+    flowSurgeEndTime: 0,  // Hour timestamp for FLOW_SURGE effect (0 = inactive)
   };
 }
 
@@ -857,10 +858,24 @@ export const useGameStore = create<GameStore>()(
         }
         
         // Calculate effective regen with incursion and meditation
-        const effectiveRegen = baseRegen * (1 - incursionStrength) * meditationMultiplier;
+        let effectiveRegen = baseRegen * (1 - incursionStrength) * meditationMultiplier;
         
-        // Mana regeneration
-        let rawMana = Math.min(state.rawMana + effectiveRegen * HOURS_PER_TICK, maxMana);
+        // FLOW_SURGE: +100% regen for 1 hour after clicking
+        let flowSurgeEndTime = state.flowSurgeEndTime;
+        if (flowSurgeEndTime > 0) {
+          if (state.hour <= flowSurgeEndTime) {
+            // FLOW_SURGE is active - double the regen
+            effectiveRegen *= 2;
+          } else {
+            // FLOW_SURGE has expired
+            flowSurgeEndTime = 0;
+          }
+        }
+        
+        // Mana regeneration with MANA_OVERFLOW support
+        const overflowMultiplier = hasSpecial(effects, SPECIAL_EFFECTS.MANA_OVERFLOW) ? 1.2 : 1.0;
+        const maxManaWithOverflow = maxMana * overflowMultiplier;
+        let rawMana = Math.min(state.rawMana + effectiveRegen * HOURS_PER_TICK, maxManaWithOverflow);
         let totalManaGathered = state.totalManaGathered;
 
         // Attunement mana conversion - convert raw mana to attunement's primary mana type
@@ -1405,6 +1420,7 @@ export const useGameStore = create<GameStore>()(
           log,
           castProgress,
           golemancy,
+          flowSurgeEndTime,
           ...craftingUpdates,
         });
       },
@@ -1421,9 +1437,18 @@ export const useGameStore = create<GameStore>()(
         cm = Math.floor(cm * overflowBonus);
         
         const max = computeMaxMana(state, effects);
+        
+        // FLOW_SURGE: Clicks restore 2x regen for 1 hour
+        let flowSurgeEndTime = state.flowSurgeEndTime;
+        if (hasSpecial(effects, SPECIAL_EFFECTS.FLOW_SURGE) && flowSurgeEndTime === 0) {
+          // Activate FLOW_SURGE for 1 hour
+          flowSurgeEndTime = state.hour + 1;
+        }
+        
         set({
           rawMana: Math.min(state.rawMana + cm, max),
           totalManaGathered: state.totalManaGathered + cm,
+          flowSurgeEndTime,
         });
       },
 

src/lib/game/types/game.ts

@@ -105,6 +105,7 @@ export interface GameState {
   rawMana: number;
   meditateTicks: number;
   totalManaGathered: number;
+  flowSurgeEndTime: number;  // Hour timestamp for FLOW_SURGE effect (0 = inactive)
 
   // Attunements (class-like system)
   attunements: Record<string, AttunementState>;  // attunement id -> state

src/lib/game/upgrade-effects.ts

@@ -336,6 +336,11 @@ export function computeDynamicRegen(
     regen += Math.floor(maxMana / 100) * 0.1;
   }
   
+  // Mana Waterfall: +0.25 regen per 100 max mana (upgraded cascade)
+  if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_WATERFALL)) {
+    regen += Math.floor(maxMana / 100) * 0.25;
+  }
+  
   // Mana Torrent: +50% regen when above 75% mana
   if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_TORRENT) && currentMana > maxMana * 0.75) {
     regen *= 1.5;
@@ -346,6 +351,11 @@ export function computeDynamicRegen(
     regen *= 1.5;
   }
   
+  // Eternal Flow: Regen immune to ALL penalties (stronger than Steady Stream)
+  if (hasSpecial(effects, SPECIAL_EFFECTS.ETERNAL_FLOW)) {
+    return regen * effects.regenMultiplier;
+  }
+  
   // Steady Stream: Regen immune to incursion
   if (hasSpecial(effects, SPECIAL_EFFECTS.STEADY_STREAM)) {
     return regen * effects.regenMultiplier;