fix: misc fixes for pdf-server, map-server, and say-server (#329)

* fix(map-server): simplify location update message format

* fix(say-server): pass host to streamable_http_app for non-localhost deployments

* refactor(pdf-server): simplify to stateless range-query architecture

- Remove caching/indexing in favor of direct HTTP Range requests
- Use HEAD requests to get file size (no full download)
- Use Range requests to proxy byte chunks (no caching)
- Local files: fs.read with offset/length
- Remote files: HTTP Range header
- Zero memory footprint (no PDF caching)
- Truly stateless (no session management needed)
- Single server.ts (~350 lines) + main.ts CLI entry point
- Instant startup (no preloading)
- Security: whitelist local files, allowed origins

Removed files:
- src/pdf-indexer.ts
- src/pdf-loader.ts
- src/types.ts

* feat(pdf-server): add dark mode support

- Add CSS variables with light-dark() function for automatic theme switching
- Sync theme with host via applyDocumentTheme()
- Apply host CSS variables via applyHostStyleVariables()

* feat(pdf-server): add list_pdfs tool back

Lists local files and allowed remote origins.
Also moves CHUNK_SIZE to module level constant.

* feat(pdf-server): improve tool descriptions and increase context limit

- display_pdf: list all allowed domains in description
- Increase MAX_MODEL_CONTEXT_LENGTH to 15000
- Move CHUNK_SIZE to module level constant

* chore(say-server): remove deployment docs from repo

Keep server.py fix for non-localhost deployments.
Deployment docs kept locally but not in repo.

* refactor(pdf-server): simplify updateModelContext format

- Add widget ID for multi-widget disambiguation
- Use concise header: 'PDF viewer (id) | title | Current Page: X/Y'
- Add 'Page content:' prefix before text
- Keep selection markers (<pdf-selection>...</pdf-selection>)

* refactor: rename widgetUUID to viewUUID for consistency

Aligns with main's standardization on 'view' terminology (PR #325).
Also dynamically generate allowed domains in display_pdf description.

* viewUUID

* fix(map-server): fix syntax error in location update message

* fix(pdf-server): restore package.json, improve server docs

- Restore --external pdfjs-dist in build
- Rewrite server.ts header for newcomers (list tools, not implementation details)
- Minimize main.ts diff

* chore(pdf-server): remove unused addAllowedOrigin/addAllowedLocalFile

* docs(pdf-server): update README for new architecture

* docs(pdf-server): restore full README, add theming section, remove get_pdf_info

* rm

* fix(pdf-server): restore createMcpExpressApp and error handling

- Use createMcpExpressApp for DNS rebinding protection
- Restore error callback in app.listen()

* fix(say-server): pass host to streamable_http_app for non-localhost deployments

* chore(say-server): remove deployment docs from repo

* widgetId->tool id

* fix(map-server): add null check for center in location update

chore(pdf-server): dedupe and sort allowed origins

* fix(map-server): use transparent background for rounded corners

* prettier

examples/map-server/mcp-app.html

@@ -14,6 +14,7 @@
             padding: 0;
             overflow: hidden;
             font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+            background: transparent;
         }
         #cesiumContainer {
             width: 100%;