Phase 7: netfox + godot-jolt stack upgrade

Stack installed:
- netfox v1.35.3 (core + extras + noray + internals)
- godot-jolt v0.16.0-stable

Architecture:
- Server: ENet transport (works headless, no netfox deps)
- Client/Editor: netfox rollback (RollbackSynchronizer, TickInterpolator)

New/modified:
- docs/migration-netfox-plan.md — migration architecture
- scripts/network/network_manager.gd — netfox-aware ENet fallback
- scripts/network/player.gd — clean base player
- client/characters/player_netfox.gd — rollback player w/ WeaponManager
- client/characters/input/player_net_input.gd — BaseNetInput subclass
- client/characters/character/fps_character_controller.gd — netfox input feed
- client/weapons/ — weapon data, registry, TacticalWeaponHitscan, WeaponManager
- client/scripts/round_replicator.gd — client-side round state bridge
- server/scripts/round_manager.gd — improved state machine
- server/scripts/plugin_api/plugin_manager.gd — refined plugin system
- config: enemy_tag, ally_tag for meatball targeting

Removed: old C++ SimulationServer GDExtension (replaced by netfox rollback)

scenes/player.tscn

@@ -1,15 +1,37 @@
 [gd_scene format=3 uid="uid://player"]
 
 [ext_resource type="Script" path="res://scripts/network/player.gd" id="1_player"]
+[ext_resource type="Script" path="res://client/characters/character/fps_camera.gd" id="2_fps_camera"]
+[ext_resource type="Script" path="res://scripts/network/player_net_input.gd" id="3_player_net_input"]
 
-[sub_resource type="BoxMesh" id="1"]
-size = Vector3(1, 1, 1)
+[sub_resource type="CapsuleShape3D" id="1"]
+radius = 0.4
+height = 1.8
 
-[node name="Player" type="Node3D"]
+[sub_resource type="BoxMesh" id="2"]
+size = Vector3(0.8, 0.8, 0.8)
+
+[node name="Player" type="CharacterBody3D"]
 script = ExtResource("1_player")
 movement_speed = 5.0
-sync_rate = 10.0
+local_walk_speed = 5.0
+local_sprint_speed = 8.0
+local_crouch_speed = 2.5
+local_jump_velocity = 4.5
+local_gravity = 15.0
+local_acceleration = 12.0
+
+[node name="FpsCamera" type="Camera3D" parent="."]
+script = ExtResource("2_fps_camera")
+current = false
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.9, 0)
+shape = SubResource("1")
+
+[node name="PlayerNetInput" type="Node" parent="."]
+script = ExtResource("3_player_net_input")
 
 [node name="Mesh" type="MeshInstance3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.5, 0)
-mesh = SubResource(1)
+mesh = SubResource("2")

scenes/server/server_player.tscn

@@ -0,0 +1,29 @@
+[gd_scene format=3 uid="uid://server_player"]
+
+; Headless dedicated server player scene.
+; No camera, no tick interpolator — server only needs physics representation.
+
+[ext_resource type="Script" path="res://scripts/network/player.gd" id="1_player"]
+[ext_resource type="Script" path="res://scripts/network/player_net_input.gd" id="2_player_net_input"]
+
+[sub_resource type="CapsuleShape3D" id="1"]
+radius = 0.4
+height = 1.8
+
+[sub_resource type="BoxMesh" id="2"]
+size = Vector3(0.8, 0.8, 0.8)
+
+[node name="Player" type="CharacterBody3D"]
+script = ExtResource("1_player")
+movement_speed = 5.0
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.9, 0)
+shape = SubResource("1")
+
+[node name="PlayerNetInput" type="Node" parent="."]
+script = ExtResource("2_player_net_input")
+
+[node name="Mesh" type="MeshInstance3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.5, 0)
+mesh = SubResource("2")