Add wildlife navigation support

Docs/TechnicalDesignDocument.md

@@ -334,6 +334,16 @@ Use Unreal Data Assets for designer-facing definitions such as:
 
 Data Assets should describe content. Server code should enforce gameplay rules.
 
+### Wildlife Navigation
+
+MVP wildlife movement is server authoritative. `AAgrarianWildlifeBase` uses an
+AI controller and Unreal navigation when nav data exists: wander targets are
+chosen from reachable nav points, chase/flee targets are projected onto navmesh,
+and movement requests use `MoveToLocation`. If a test map or early generated
+tile has no nav data, wildlife falls back to direct movement input so damage,
+flee, chase, and harvest loops remain functional while map navigation is being
+authored.
+
 ### JSON Metadata
 
 Use JSON files for external terrain/tile pipeline metadata while the pipeline is