- bvh_vis/ → bvh_debug/, bvh_vis.h → bvh_debug.h
- All bvh_vis_ prefixes → bvhd_ (shorter, consistent)
- bvh_visualize() → bvhd_run()
- Update Makefile SRCS and includes in main.c, render_loop.c

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Align with verb-first naming convention used elsewhere.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- intersect_object_new → intersect_object
- intersect_cylinder_new → intersect_cylinder
- intersect_cone_new → intersect_cone

The _new suffix was a migration artifact; the old versions no longer
exist, so the suffix adds no value.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Align with module-prefixed naming convention (shadow_*).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- format_and_print_vec3 → hud_print_vec3
- render_camera_fov → hud_render_camera_fov
- render_light_bright → hud_render_light_bright
- render_object_entry → hud_render_object_entry
- keyguide_render_content2 → keyguide_render_objects_section (static)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Merge single-purpose files back into their parent modules to reduce
file count and improve locality:
- parse_token.c → parser_utils.c (skip_whitespace, at_line_end)
- parse_number_utils.c → parse_number.c (parse_int_part, parse_frac_part)
- parse_error_msg.c → parse_error.c (error_write_int, get_error_message)
- Replace parse_is_digit() with libft's ft_isdigit()

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- Remove scene_flags.c: scene_has_ambient, scene_has_camera,
  scene_set_flag, scene_clear_flag were trivial wrappers around
  bitwise ops — inline them at call sites
- Make object_list_grow() static (only called within object_list.c)
- Remove exported prototypes from minirt.h

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- Move timer_elapsed_us declaration from metrics.h to utils.h
- Remove timer_start (callers use gettimeofday directly)
- Remove timer_elapsed_ms (unused)
- metrics_frame.c: call gettimeofday directly

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- Remove debounce_timer_start/reset/stop — these were one-line
  wrappers around gettimeofday/is_active assignments
- Inline timer operations directly at call sites in render_debounce.c
- Use timer_elapsed_us from utils.h in debounce_timer_expired and
  debounce_check_preview_throttle

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- render_scene_to_buffer, create_camera_ray, trace_ray:
  minirt.h → render.h (render pipeline belongs in render module)
- close_window, handle_key, handle_expose:
  render.h/input.h → mlx_context.h (MLX event callbacks belong
  with MLX context)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

The header defines scene, camera, light, and object types — scene.h
better reflects its actual content. Update all 40 source files that
included minirt.h.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Align header name with its module directory (src/display/).
Update include guard and all source files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

These are HUD-specific format helpers, not libft extensions — use the
hud_ prefix. Move declarations from hud.h (public) to hud_internal.h
(module-internal only).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>