Build zone templates from CZONE instead of static_zone_templates

ZoneManager._zone_templates now holds the parser's CZoneTemplate: every
CZONE template plus the player-city template 0, still built in code.
Zone and Terrain read the mbEnums sea level and terrain types instead of
strings. The static_zone_templates loader goes with the old map type;
the table stays until Task 4.2.

Parity: all 861 templates, every column the server read (type, name,
peace, radii, blends, sea level and type, water, terrain gen, type,
max_y, image) identical to the JSON. Value changes: none.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/InterestManagement/Terrain.java

@@ -11,6 +11,7 @@ package engine.InterestManagement;
 import engine.gameManager.ZoneManager;
 import engine.math.Vector2f;
 import engine.math.Vector3fImmutable;
+import engine.mbEnums;
 import engine.objects.Zone;
 import org.pmw.tinylog.Logger;
 
@@ -46,7 +47,7 @@ public class Terrain {
         // Configure PLANAR zones to use the same 16x16 pixel image
         // that all similar terrains share.  (See JSON)
 
-        if (this.zone.template.terrain_type.equals("PLANAR"))
+        if (this.zone.template.terrain_type == mbEnums.TerrainGenType.PLANAR)
             this.heightmap = 1006300;  // all 0
 
         // Load pixel data for this terrain from cache
@@ -71,8 +72,8 @@ public class Terrain {
         // the blending area between child and parent terrains when
         // they are stitched together.
 
-        this.blend_values.x = this.zone.template.max_blend;
-        this.blend_values.y = this.zone.template.min_blend;
+        this.blend_values.x = this.zone.template.zone_max_blend;
+        this.blend_values.y = this.zone.template.zone_min_blend;
 
         Vector2f major_blend = new Vector2f(this.blend_values.x / this.zone.major_radius,
                 this.blend_values.y / this.zone.major_radius);
@@ -217,8 +218,8 @@ public class Terrain {
 
         // Normalize terrain offset
 
-        Vector2f normalizedOffset = new Vector2f(Math.abs(zone_offset.x) / this.zone.template.major_radius,
-                Math.abs(zone_offset.y) / this.zone.template.minor_radius);
+        Vector2f normalizedOffset = new Vector2f(Math.abs(zone_offset.x) / this.zone.template.zone_major_radius,
+                Math.abs(zone_offset.y) / this.zone.template.zone_minor_radius);
 
         float blendCoefficient;