FAZA 17: 2.5D Minecraft-Style Terrain + Y-Layer Stacking + Custom Sprites

COMPLETED FEATURES:

 Custom Sprite Integration:
- Player, Zombie, Merchant sprites (0.2 scale)
- 11 custom sprites + 5 asset packs loaded
- Auto-transparency processing (white/brown removal)
- Gravestone system with atlas extraction

 2.5D Minecraft-Style Terrain:
- Volumetric blocks with 25px thickness
- Strong left/right side shading (30%/50% darker)
- Minecraft-style texture patterns (grass, dirt, stone)
- Crisp black outlines for definition

 Y-Layer Stacking System:
- GRASS_FULL: All green (elevation > 0.7)
- GRASS_TOP: Green top + brown sides (elevation 0.4-0.7)
- DIRT: All brown (elevation < 0.4)
- Dynamic terrain depth based on height

 Floating Island World Edge:
- Stone cliff walls at map borders
- 2-tile transition zone
- Elevation flattening for cliff drop-off effect
- 100x100 world with defined boundaries

 Performance & Polish:
- Canvas renderer for pixel-perfect sharpness
- CSS image-rendering: crisp-edges
- willReadFrequently optimization
- No Canvas2D warnings

 Technical:
- 3D volumetric trees and rocks
- Hybrid rendering (2.5D terrain + 2D characters)
- Procedural texture generation
- Y-layer aware terrain type selection

FAZA_12_CHECKLIST.md

@@ -0,0 +1,54 @@
+# FAZA 12: Napredno Shranjevanje (Persistence) - Checklist
+
+**Status:** ✅ ZAKLJUČENO
+
+**Datum:** 2025-12-06
+
+---
+
+## ✅ Opravila (Developer)
+
+- [x] Nadgradnja `SaveSystem.js`:
+    - [x] **Inventar:** Shranjujejo se sloti in gold.
+    - [x] **Teren:** Shranjujejo se dinamični objekti (ograje, hiše, rože).
+    - [x] **Kmetija:** Shranjujejo se pridelki (faza rasti).
+    - [x] **Statistika & Čas:** Shranjeno.
+- [x] Loading Logic:
+    - [x] Čiščenje scene pred nalaganjem (preprečevanje duplikatov).
+    - [x] Ponovna obnova sveta iz Seeda + Naloženih sprememb.
+
+---
+
+## 🧪 Ročno testiranje (Naročnik)
+
+### Test: Save & Reload
+**Ukaz:** Zgradi, Zasluži, Shrani (F5), Osveži, Naloži (F9).
+
+**Pričakovani rezultat:**
+- [x] Vse strukture in pridelke so na svojem mestu.
+- [x] Zlato je povrnjeno.
+
+---
+
+## 📋 Potrditev Naročnika
+
+```
+FAZA 12: [STATUS]
+- Testirano: [DA]
+- Datum testiranja: 2025-12-06
+- Opombe: Uporabnik potrdil: "vse je ok"
+
+ODOBRENO ZA FAZO 13: [DA]
+
+Podpis naročnika: User
+```
+
+---
+
+## ➡️ Naslednji koraki (po odobritvi)
+
+Ko naročnik potrdi FAZO 12, se začne:
+**FAZA 13: Zombi Delavec (The Alpha System)**
+- Implementacija AI za zombija.
+- Krotenje (Follow/Stay komande).
+- Prva avtomatizacija (npr. Zombi sledi in napada ali pa samo stoji).