v0.3.0: game-window picker + NCC recognition + artifacts + ?-merged

- window_capture.py: enumerate top-level windows (pygetwindow) and
  capture a specific one via PrintWindow PW_RENDERFULLCONTENT (works
  on non-focused windows). Linux falls back to mss region grab.
- recognizer.py: replace MAE matcher with NCC over numpy vectors.
  Each rotatable slab generates 4 templates (0/90/180/270). Adds 248
  artifact templates and an empty-cell heuristic (low mean/std-dev).
  Cells below confidence floor are tagged "unknown" — likely merged
  "?" boxes.
- gui.py: new ScreenshotFrame with [게임 창 선택] button → window
  picker dialog → bbox crop → recognize → editable preview grid with
  per-cell CellEditor that handles slab / artifact / merged(?) / empty.
  Merged cells let user pick which two slabs got combined + a level.
- artifacts.py + bundled _artifacts.json (248 entries from
  WhiteDog1004/sephiria) for matching and rendering.
- renderer.py: factored CDN fetch into _fetch_image; added
  fetch_artifact_image().
- requirements.txt: + numpy, pygetwindow (Win), pywin32 (Win).
- docker-build-cmd.sh: upgrade PyInstaller to 5.x inside cdrx
  container so numpy DLL manifest reads work.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker-build-cmd.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e
+cd /src
+pip install --upgrade 'pyinstaller<6' 2>&1 | tail -3
+pyinstaller --clean -y --onefile --noconsole --name sephiria_inv \
+  --add-data 'sephiria_inv/_artifacts.json;sephiria_inv' \
+  --hidden-import sephiria_inv --hidden-import sephiria_inv.gui \
+  --hidden-import sephiria_inv.recognizer --hidden-import sephiria_inv.artifacts \
+  --hidden-import sephiria_inv.window_capture --hidden-import sephiria_inv.capture \
+  --hidden-import sephiria_inv.screenshot --hidden-import sephiria_inv.slabs \
+  --hidden-import sephiria_inv.solver --hidden-import sephiria_inv.renderer \
+  --hidden-import mss --hidden-import mss.windows --hidden-import numpy \
+  --hidden-import pygetwindow --hidden-import PIL.ImageTk \
+  -p . run.py