Prep for PyPI: absolute image URL, exclude heavy assets from sdist

- README: use raw.githubusercontent.com URL for the demo screenshot so it
  renders on the PyPI project page (PyPI does not serve repo-relative paths).
- pyproject: add [tool.hatch.build.targets.sdist] exclude for .claude/ and
  docs/images/* to keep the sdist small.
- Remove the old app-grid.png; the landing screenshot is app-screenshot-1.png.
- .gitignore: .claude/ harness directory.

Author: BirdInTheTree

.gitignore

@@ -57,3 +57,6 @@ runs/
 
 # Worktrees
 .worktrees/
+
+# Claude Code harness (local)
+.claude/

README.md

@@ -10,7 +10,7 @@ For TV researchers, screenwriters, and anyone building narrative analysis tools
 
 <p align="center">
   <a href="https://birdinthetree.github.io/plotter-app/">
-    <img src="docs/images/app-screenshot-1.png" alt="tvplot output — plotline×episode grid for Breaking Bad S01">
+    <img src="https://raw.githubusercontent.com/BirdInTheTree/tvplot/main/docs/images/app-screenshot-1.png" alt="tvplot output — plotline×episode grid for Breaking Bad S01">
   </a>
   <br>
   <strong><a href="https://birdinthetree.github.io/plotter-app/">Try the interactive demo →</a></strong>

docs/images/app-grid.png

@@ -65,5 +65,8 @@ artifacts = [
     "src/tvplot/prompts/narratology/*.md",
 ]
 
+[tool.hatch.build.targets.sdist]
+exclude = [".claude", "docs/images/*"]
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]