D168: fix vertically-flipped GE_PCDUMP captures; close D114/D116

gfx_opengl_dump_bound_fbo wrote glReadPixels output (GL bottom-left
origin) straight into a top-row-first P6 PPM, so every GE_PCDUMP / F12
capture was upside-down. This is the entire source of the D114/D116
"HUD/text X-mirror" - four sessions chasing a fast3d mirror that never
existed, misreading inverted screenshots of asymmetric content. The
developer confirms the game renders correctly on real hardware.

- writer now emits rows top-to-bottom
- tools_pc/golden/*.png flipped in place to match + golden/README.md
- D114/D116 reclassified as capture-orientation artifacts (not deleted);
  D75 "logo mispositioned" / RC1 "photo 180 deg" flagged for re-judging
- annotations in findings.md, GRAPHICS-BACKLOG.md,
  TEXTURE-GLITCH-ANALYSIS.md, porting-notes.md D2, GE-ENV-PROBES.md

Not runtime-verified (migrated tree has no ROM/toolchain) - needs a
fresh capture to confirm text reads normally.

Claude-Session: https://claude.ai/code/session_01UpTM1AcBRJuTetoZNcCD5V

docs/dev/GRAPHICS-BACKLOG.md

@@ -8,12 +8,12 @@ once the game is playable start-to-finish without crashes.
 
 | ID | Symptom | Status / notes |
 |----|---------|----------------|
-| **D114/D116** | HUD text + ammo digits render each glyph individually X-mirrored (screen positions correct, texture content flipped). Likely also explains "inverted" guard skins / mislocated door props. | Root cause NOT found after 4 sessions (M-6/7/8/11). Every stage `textRenderGlyph`→GBI→fast3d→`buf_vbo`→GL runtime-verified non-mirrored (`GE_D116` `[D116/vbo]` probe). Contradiction unresolved. **Next attempt requires a RenderDoc/apitrace capture of one glyph texrect, or the asymmetric-1-texel-texture experiment** — do NOT re-run the static trace, and do NOT apply a global texrect S-swap (mirrors the whole screen). |
+| ~~**D114/D116**~~ | ~~HUD text + ammo digits render each glyph individually X-mirrored~~ | **CLOSED — NOT A BUG (M-33, §F D168).** The `GE_PCDUMP` PPM writer never reversed `glReadPixels` rows, so every capture was upside-down; "mirrored" was a misread of inverted asymmetric content. The game renders correctly on hardware (developer-confirmed). Writer fixed (`gfx_opengl.cpp`). "Every stage verified non-mirrored" was correct — there was no mirror. |
 | **D74 wrap-block** | `gfx_pc.cpp:1546/1551` PORT block is dead code: guard `cms & G_TX_WRAP` with `G_TX_WRAP==0` is always false; and it indexes per-texunit `[2]` arrays with the vertex index `i` (0..2) → OOB if reached. | Latent. Harmless for CLAMP glyphs; could affect wrapped textures on triangles (room panels, model skins). Fix: `cms == G_TX_WRAP`, and compute the tile window once per tile not per vertex. Verify against `tools_pc/golden/` after. |
-| **D75** | Nintendo logo mispositioned; gun-barrel Bond model absent; cast-roll character models absent. (Rareware logo OK.) | Front-end 3D model path. Partially overlaps D114 (shared mirror on asymmetric content). Triage plan in `findings.md` §F D75. |
+| **D75** | Nintendo logo mispositioned; gun-barrel Bond model absent; cast-roll character models absent. (Rareware logo OK.) | Front-end 3D model path. The "overlaps D114 shared mirror" note is withdrawn (M-33, D168 — D114 was a flipped capture). "Logo mispositioned" should be re-judged from a right-way-up capture; the absent-models half stands. Triage plan in `findings.md` §F D75. |
 | **D76** | 2D disclaimer screen only partially drawn. | §F D76. |
 | **D77** | No audible music on PC. | Phase 3 (audio). §F D77. |
-| **D116 (HUD)** | (subset of D114) proportional-font strings + ammo counter mirrored. | Same root cause as D114. |
+| ~~**D116 (HUD)**~~ | ~~proportional-font strings + ammo counter mirrored~~ | **CLOSED — NOT A BUG (M-33, §F D168).** Same capture-orientation artifact as D114. |
 | **D148** | Level-end cinematics don't play. Dam: hitting the exit trigger should show Bond rappelling down the dam (the bungee jump); instead it cuts straight to the mission-complete report. | Scripted cutscene / cinematic-camera + Bond rappel anim. Found M-27 during the first full Dam→Facility playthrough. Progression is unaffected — the report and next briefing load fine. **M-31 (§F D160):** static-traced the Dam end ailists (`ai_24`→`ai_17`, `camera_switch`→`CutsceneRecord` type-46 lookup). Diagnostic `GE_D160=1` shipped (`c95713f5`) — user runs Dam to the exit with it set; the trace pins whether the cutscene AI runs, and whether the propDef-index walk (D122/D132 family) hands `camera_switch` a bogus cutscene record. Leading hypothesis: propDef `sizepropdef` stride desync (medium confidence), not D75 anim-model. |
 | **D149** | Front-end MISSION COMPLETE / mode-select 3D models (dossier, wallets) render as garbled full-screen geometry or not at all — one of the compiled sub-DLs (seg5+0x9ee4) is malformed, D146 now skips it instead of aborting. | D75 family. §F D146. |