Fix audit findings: crash safety, correctness, rendering, performance

Crash/UB:
- gate every hook behind an init-stage flag until config/surface/input are ready
- publish module maps as immutable atomic snapshots instead of reallocating
  shared vectors under unlocked readers
- validate the %ebp walk in the RandomSeed/RandomFloat hooks against the stack
- bounds-check every RecvTable/RecvProp/string dereference with module_range()
- preserve the Itanium vtable header when cloning (client, CInput, model render,
  studio render)
- reject negative usercmd sequence numbers; guard config_load against a null
  section target; cap the bone parent walk; check mprotect; drop PROT_EXEC on
  the GOT patch; absorb server.so .bss tail

Correctness:
- filter dormant entities across ESP, aimbot, triggerbot, melee, items and
  projectiles (slot self-tested against the local player)
- reset the server-health latch per map and only latch on valid model indices
- bone cache sized for the 128-target scan; set valid=false on every failure;
  head_position keeps searching past an invalid bone
- vischeck steps past glass by probing until clear, and ignores entities owned
  by the target (held weapons, bone followers)
- aimbot: maxs no longer disables it, AABB-aware FOV prefilter, lock hysteresis,
  lead point re-checked for FOV and visibility
- spread: seed hook arms on the no-spread toggle alone; engine toggle only
  controls the RandomFloat zeroing
- resolve m_hOwnerEntity/m_hOwner; NPC lead velocity from the server entity
- vector_angles pitch range, point_ground normal test, underwater jump+duck no
  longer skips combat, semi-auto press/release edge for synthetic fire
- item/projectile markers and blast rings refresh origin per frame while
  discovery stays at 10 Hz; trajectory uses the real m_DmgRadius and honours
  the blast-radius toggle

Rendering/GUI:
- one overlay draw per engine frame (FRAME_RENDER_START boundary), fixing
  alpha stacking and the speed-graph flicker
- clipped lines/outlines and ellipsised text instead of drawing past the
  content pane or shifting over neighbours
- dropdown dismissal consumes the click; hover ignores hidden controls
- chams: reset AlphaModulate, reference shared materials once, restore prop
  tint colour; fonts created once per handle
- projection uses Source's 4:3 aspect scaling and roll; screen size refreshed
  each frame; FOV circle gated on the aim toggles, not the bind

Performance:
- TTL caches for NPC relation, friendly/neutral and damage class
- model names memoised per model index
- entity pointer -> index cache for the triggerbot (was a 4096-slot walk/tick)

Build:
- real Makefile with -MMD dependency tracking, debug/release objects and an
  always-relink rule; build.sh kept as a thin wrapper

1 files changed, 60 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..12a6f92
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,60 @@
+# libhl2hake.so — 32-bit Source Engine plugin.
+#
+#   make            release build (build/release, -O2)
+#   make debug      build/debug with -O0 -g (symbolise crash addresses)
+#   make clean
+#
+# Needs a 32-bit multilib toolchain (g++-multilib on Debian/Ubuntu).
+
+CXX      ?= g++
+OUT      := libhl2hake.so
+SRC      := $(wildcard src/*.cpp)
+ODIR     ?= build/release
+OPT      ?= -O2
+
+CXXFLAGS := -m32 -std=c++17 -Wall -Wextra -Werror -fPIC \
+            -fvisibility=hidden -fno-omit-frame-pointer -pthread \
+            -MMD -MP $(OPT)
+LDFLAGS  := -m32 -shared -pthread -Wl,--no-undefined
+LDLIBS   := -ldl
+
+OBJ := $(patsubst src/%.cpp,$(ODIR)/%.o,$(SRC))
+DEP := $(OBJ:.o=.d)
+
+all: check $(OUT)
+        @file $(OUT)
+        @test -f assets/LiberationSans-Regular.ttf || \
+          echo "warning: assets/ is missing next to the .so; the overlay falls back to system fonts" >&2
+
+# Objects, dependency files and headers are handled by make itself; this only
+# keeps the debug build in its own directory.
+debug:
+        @$(MAKE) --no-print-directory ODIR=build/debug OPT="-O0 -g"
+
+# Always relink. Both configs write the same output file, so without this a
+# plain `make` after `make debug` would keep the debug binary (the .so is newer
+# than the release objects). Linking is sub-second.
+.PHONY: FORCE
+FORCE:
+
+$(OUT): $(OBJ) FORCE
+        $(CXX) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS)
+
+$(ODIR)/%.o: src/%.cpp | $(ODIR)
+        $(CXX) $(CXXFLAGS) -c $< -o $@
+
+$(ODIR):
+        @mkdir -p $@
+
+# Fail once with a usable message instead of a wall of compiler errors.
+.PHONY: check
+check:
+        @printf 'int main(){return 0;}\n' | \
+          $(CXX) -m32 -x c++ - -o /dev/null 2>/dev/null || \
+          { echo "error: $(CXX) cannot build 32-bit binaries; install g++-multilib" >&2; exit 1; }
+
+.PHONY: all debug clean
+clean:
+        rm -rf build $(OUT)
+
+-include $(DEP)