feat: Remove banned mana types (life, blood, wood, mental, force) and lifesteal

- Remove life, blood, wood, mental, force mana types from ELEMENTS
- Remove all spells using banned mana types
- Remove lifesteal from all remaining spells and effects
- Update guardian perks to remove lifesteal mentions
- Remove research skills for banned spell types
- Update tests to reflect new element structure
- Add BANNED CONTENT section to AGENTS.md (lifesteal/healing ban)
- Add mana types overview to README.md and AGENTS.md
- All 44 tests pass, lint clean

worklog.md

@@ -479,3 +479,75 @@ Stage Summary:
 - Research system properly gates access to advanced spell enchantments
 - All 44 tests pass
 - Lint passes clean
+
+---
+Task ID: 25
+Agent: Main
+Task: Remove banned mana types (life, blood, wood, mental, force) and lifesteal
+
+Work Log:
+- **Removed banned mana types from ELEMENTS**:
+  - Removed life, blood, wood, mental, force from ELEMENTS definition
+  - Updated crystal recipe from sand + sand + mental to sand + sand + light
+  - Updated FLOOR_ELEM_CYCLE to remove life
+  - Updated ELEMENT_OPPOSITES to remove life/death pair
+  - Updated ELEMENT_ICON_NAMES to remove banned elements
+
+- **Removed spells using banned elements**:
+  - Removed life spells: lifeTap, thornWhip, entangle, worldTree
+  - Removed blood spells: bloodNeedle, bloodSlash, bloodRite, sanguineStorm
+  - Removed wood spells: thornStrike, rootGrab, treePunch, forestAwakening
+  - Removed mental spells: mindSpike, psychicBlast, mindCrush, cerebralAnnihilation
+  - Removed force spells: forcePush, kineticBlast, gravityWell, telekineticStorm
+  - Removed transference spells with lifesteal: transferStrike, manaRip, essenceDrain, soulTransfer
+
+- **Removed lifesteal from remaining spells**:
+  - drain - removed lifesteal effect
+  - soulRend - removed lifesteal effect
+  - deathMark - removed lifesteal effect
+  - voidBlade - changed from lifesteal to +20% damage buff
+
+- **Updated guardians**:
+  - Floor 20 (Aqua Regia): Changed from "Water spells have 10% lifesteal" to "Water spells deal +15% damage"
+  - Floor 60 (Umbra Mortis): Changed from "Dark spells have 20% lifesteal" to "Dark spells deal +25% damage to armored enemies"
+  - Floor 70 (Vita Sempiterna): REMOVED (life element guardian)
+
+- **Removed research skills for banned spell types**:
+  - Removed researchBloodSpells, researchWoodSpells, researchMentalSpells, researchForceSpells
+  - Removed advanced and master variants of above
+  - Updated researchLifeDeathSpells description
+
+- **Updated EFFECT_RESEARCH_MAPPING**:
+  - Removed lifesteal_5 from researchSpecialEffects
+  - Removed all blood, wood, mental, force spell mappings
+
+- **Updated enchantment-effects.ts**:
+  - Removed lifesteal_5 effect
+  - Removed all blood, wood, mental, force spell enchantments
+  - Updated remaining spell descriptions to remove lifesteal mentions
+
+- **Removed lifesteal from types.ts**:
+  - Removed 'lifesteal' from SpellEffect type union
+
+- **Removed lifesteal handling from store.ts**:
+  - Removed lifesteal effect processing code
+
+- **Updated SpireTab.tsx**:
+  - Removed lifesteal badge rendering
+  - Added badge rendering for other effect types
+
+- **Added documentation**:
+  - Added "BANNED CONTENT" section to AGENTS.md explaining lifesteal/healing ban
+  - Added mana types overview to AGENTS.md with all current mana types
+  - Added mana types overview to README.md
+
+- **Fixed tests**:
+  - Updated bug-fixes.test.ts to test existing elements (transference, metal, sand, lightning)
+  - All 44 tests now pass
+
+Stage Summary:
+- Lifesteal and healing completely removed from player abilities
+- Banned mana types (life, blood, wood, mental, force) removed from game
+- Crystal recipe updated to use light instead of mental
+- Documentation updated with banned content policy
+- All tests pass, lint clean