Logging: per-session file and debug-gated verbose logs

- Open /tmp/hl2hake.log once in the library constructor with "w" so each
  session starts clean, use line buffering, flush each line, and close it via
  atexit. No more fopen/fclose per message.
- Add logd() for verbose diagnostics, enabled only with HL2H_DEBUG=1.
- Move ESP/NPC scans, item-prop/item-classification logs, aimbot/silent-aim/
  melee/triggerbot/spread details, jumpbug tracking, bone dumps, netvar dumps,
  cmd-modified and ground-trace noise to logd().
- Keep logf() for lifecycle, config, warnings/errors, GUI open/close, item
  category/tagging summaries and item-crate detections so crate debugging
  works without the ESP stream.
- Supply crates now respect the max-distance slider (user change), with the
  stale comment and CONTEXT updated.
- Document HL2H_DEBUG=1 in play.sh and CONTEXT.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/vischeck.cpp b/src/vischeck.cpp
index 6d453c5..dcb5c3c 100644
--- a/src/vischeck.cpp
+++ b/src/vischeck.cpp
@@ -185,7 +185,7 @@ float ground_distance(const Vector &origin, void *ignore, float max_dist) {
     static int solid_logs = 0;
     if (tr.startsolid && solid_logs < 4) {
       solid_logs++;
-      logf("ground trace: startsolid at (%.1f %.1f %.1f)", origin.x,
+      logd("ground trace: startsolid at (%.1f %.1f %.1f)", origin.x,
            origin.y, origin.z);
     }
     return -1.0f;