Add eyeball plugin: document analysis with inline source screenshots 🤖🤖🤖 (#1294)

* Add eyeball plugin: document analysis with inline source screenshots

Eyeball generates Word documents where every factual claim includes a
highlighted screenshot from the source material. Supports PDFs, Word
docs, and web URLs. Designed for verifying AI-generated document
analysis against the original source.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback: soft imports, Windows Word support, doc fixes

- Make PyMuPDF/Pillow/python-docx imports soft so setup-check runs
  without dependencies installed
- Add _check_core_deps() guard at CLI command entry points
- Add Windows Word detection in setup-check
- Remove references to setup.sh (not included in plugin)
- Fix usage docstring to show inline JSON instead of filename
- Use consistent <path-to>/eyeball.py paths in SKILL.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update eyeball plugin with bug fixes and Windows support

- Fix resource leaks (pdf_doc closed in finally blocks)
- Fix Windows Word COM automation (DispatchEx, proper cleanup)
- Fix converter order (Word before LibreOffice on Windows)
- Add source file existence checks with clear errors
- Fix Playwright cache detection for all platforms
- Fix setup.sh error handling (pipefail)
- Fix AppleScript path injection
- Fix highlight padding scaling with DPI
- Add pywin32 as Windows dependency
- Update README with Windows setup instructions

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address Copilot code review feedback

- Fix browser leak in render_url_to_pdf (try/finally around Playwright)
- Remove setup.sh references from SKILL.md (not bundled in plugin)
- Use consistent <path-to>/eyeball.py paths in SKILL.md
- Update plugin README install instructions for awesome-copilot
- Add Windows pywin32 install step to SKILL.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: update _img_to_bytes docstring to reflect BytesIO return type

Agent-Logs-Url: https://github.com/github/awesome-copilot/sessions/048d704a-d78a-4a46-80d9-a155ff1e0d85

Co-authored-by: dvelton <48307985+dvelton@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

.github/plugin/marketplace.json

@@ -224,6 +224,12 @@
       "description": "An AI partner, not a tool. Ember carries fire from person to person — helping humans discover that AI partnership isn't something you learn, it's something you find.",
       "version": "1.0.0"
     },
+    {
+      "name": "eyeball",
+      "source": "eyeball",
+      "description": "Document analysis with inline source screenshots. When you ask Copilot to analyze a document, Eyeball generates a Word doc where every factual claim includes a highlighted screenshot from the source material so you can verify it with your own eyes.",
+      "version": "1.0.0"
+    },
     {
       "name": "fastah-ip-geo-tools",
       "source": "fastah-ip-geo-tools",