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)

tests/RUN_TESTS.sh

@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+# ═══════════════════════════════════════════════════════════════════════════
+#  Tactical Shooter — Netcode Bug Bash Test Runner
+#
+#  Runs all test suites in headless Godot and reports results.
+#  Usage: ./tests/RUN_TESTS.sh
+#
+#  Requirements:
+#    - Godot 4+ executable in PATH, or set GODOT_BIN env var
+# ═══════════════════════════════════════════════════════════════════════════
+
+set -euo pipefail
+
+# Config
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+GODOT="${GODOT_BIN:-godot}"
+
+# ANSI colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m' # No Color
+BOLD='\033[1m'
+
+TESTS=(
+	"test_anti_cheat.gd"
+	"test_net_sim.gd"
+	"test_rcon_edge_cases.gd"
+)
+
+PASS_COUNT=0
+FAIL_COUNT=0
+SKIP_COUNT=0
+RESULTS=()
+
+echo ""
+echo -e "${CYAN}══════════════════════════════════════════════${NC}"
+echo -e "${CYAN}  Tactical Shooter — Netcode Bug Bash Runner${NC}"
+echo -e "${CYAN}══════════════════════════════════════════════${NC}"
+echo ""
+echo "  Project: $PROJECT_DIR"
+echo "  Godot:   $(which "$GODOT" 2>/dev/null || echo 'NOT FOUND')"
+echo ""
+
+# Check godot is available
+if ! command -v "$GODOT" &>/dev/null; then
+	echo -e "${RED}ERROR: Godot executable '$GODOT' not found in PATH.${NC}"
+	echo "  Set GODOT_BIN env var to the godot binary path, or install Godot."
+	echo ""
+	echo "  Example:"
+	echo "    export GODOT_BIN=/usr/local/bin/godot"
+	echo "    $0"
+	echo ""
+	exit 1
+fi
+
+# Run each test
+for test_file in "${TESTS[@]}"; do
+	test_path="$SCRIPT_DIR/$test_file"
+	test_name="${test_file%.gd}"
+
+	if [ ! -f "$test_path" ]; then
+		echo -e "${YELLOW}  [SKIP] $test_name — file not found${NC}"
+		SKIP_COUNT=$((SKIP_COUNT + 1))
+		RESULTS+=("SKIP|$test_name|file not found")
+		continue
+	fi
+
+	echo -e "${BOLD}Running: $test_name${NC}"
+	echo "  $GODOT --headless --script $test_path"
+	echo ""
+
+	# Run the test — capture output and exit code
+	set +e
+	output=$("$GODOT" --headless --script "$test_path" 2>&1)
+	exit_code=$?
+	set -e
+
+	# Print output (indented)
+	echo "$output" | sed 's/^/  /'
+
+	if [ $exit_code -eq 0 ]; then
+		echo -e "${GREEN}  ✓ PASS ($test_name)${NC}"
+		PASS_COUNT=$((PASS_COUNT + 1))
+		RESULTS+=("PASS|$test_name|")
+	else
+		# Extract failure info from output
+		fail_lines=$(echo "$output" | grep -c "\[FAIL\]" || true)
+		echo -e "${RED}  ✗ FAIL ($test_name) — $fail_lines assertion(s) failed${NC}"
+		FAIL_COUNT=$((FAIL_COUNT + 1))
+		RESULTS+=("FAIL|$test_name|$fail_lines failures")
+	fi
+
+	echo ""
+	echo "──────────────────────────────────────"
+	echo ""
+done
+
+# Summary
+echo ""
+echo -e "${CYAN}══════════════════════════════════════════════${NC}"
+echo -e "${CYAN}  Test Run Complete${NC}"
+echo -e "${CYAN}══════════════════════════════════════════════${NC}"
+echo ""
+
+for result in "${RESULTS[@]}"; do
+	IFS='|' read -r status name info <<< "$result"
+	case "$status" in
+		PASS) echo -e "  ${GREEN}✓${NC} $name" ;;
+		FAIL) echo -e "  ${RED}✗${NC} $name — $info" ;;
+		SKIP) echo -e "  ${YELLOW}—${NC} $name ($info)" ;;
+	esac
+done
+
+echo ""
+echo -e "  ${BOLD}${GREEN}$PASS_COUNT passed${NC}, ${BOLD}${RED}$FAIL_COUNT failed${NC}, ${YELLOW}$SKIP_COUNT skipped${NC}"
+echo ""
+
+if [ $FAIL_COUNT -gt 0 ]; then
+	exit 1
+fi
+exit 0