v0.6.0: issue fixes and v0.7.0 roll-ins before release

Issue fixes:
- D643 (#145 b/c, #149): Original control style is a strict virtual N64 pad
  (native buttons in stage/menu/watch/tank, per-seat Input.N64Pad remap,
  Input.N64StickFeel)
- D605 + D645 (#145 a): Invert look reaches the original styles; in Original
  it is the game's own Look up/down, synced with the F10 row
- D606 (#144): optional always-visible mission timer
- D644 (#146): IA4 decodes as the RDP's I3:A1 (file-select crest drew on a
  dark square)
- D581 (#151): open on the real primary monitor (SDL display 0) and centre
  every window placement in the display's global bounds; the earlier
  "display at (0,0)" rule still picked the left monitor
- D580 (#153, #156): runtime check of the propDef type/end-of-list fix
- D646: F10 dropdown popup stays inside the settings box

Frame rate (#148):
- D578: Auto follows the display up to 240 (4 presents per sim tick, the
  renderer's ceiling); 165 and 240 in the Frame rate cap row

Rolled in from release/v0.7.0:
- D632: release the GL context + window before exit (BSOD 0x119)
- D626: Windows per-monitor DPI awareness
- D639: exclusive fullscreen uses the desktop mode
- verify.sh: a frame-size mismatch fails; demobatch/flicker_scan harness

Release gate, licenses, docs:
- NOTICE: macOS packaging and pi/ coverage; runtime libraries bundled in
  the downloads (SDL2/SDL3, zlib, MinGW runtime, macOS GCC runtime)
- macOS package ships SDL3, GCC COPYING.RUNTIME and the GPL-3.0 text
  (tools_pc/dist/GPL-3.0.txt)
- README: release date 2026-10-13, "Why play this port", Legal (Apple,
  runtime licenses), frame-rate text; site date tokens
- tools_pc/release_gate.sh: one-command win/deck/mac release checks
- release notes, findings D578/D580/D581/D643-D646 + index, porting notes

NOTICE

@@ -10,6 +10,9 @@ repository:
   * the port layer            port/
   * the PC build system        CMakeLists.txt, cmake/, build-pc.sh
   * PC-port tooling            tools_pc/
+  * macOS packaging            scripts/package-macos.sh, scripts/gen_macho_syms.py,
+                               scripts/strip_weak_pragmas.py
+  * agent-development tooling  pi/ (not part of the game build)
   * documentation              docs/, README.md
 
 Third-party code vendored into the port layer keeps its own license:
@@ -18,6 +21,17 @@ Third-party code vendored into the port layer keeps its own license:
     libultraship / sm64-port lineage; see port/fast3d/LICENSE.txt.
   * port/fast3d/glad/ - generated OpenGL loader (glad), public domain / MIT.
 
+Runtime libraries bundled in the downloads (not in this repository) keep
+their own licenses; each license text ships in the download's licenses/ folder:
+
+  * SDL2 (all platforms) and SDL3 (macOS, loaded by sdl2-compat) - zlib license.
+  * zlib - zlib license.
+  * Windows: the MinGW-w64 runtime (libwinpthread, libgcc, libstdc++).
+  * macOS: the GCC runtime (libgcc_s, libstdc++) - GPL-3.0 with the GCC
+    Runtime Library Exception 3.1. The GPL-3.0 text the macOS package ships
+    is tools_pc/dist/GPL-3.0.txt (the Homebrew gcc keg carries only the
+    exception text and GPL-2.0).
+
 Vendored build tooling keeps its own license (none of it is compiled or linked
 into the PC port; it belongs to the N64 decompilation build):