gioser-web: replace Rust SVG graph with Cytoscape.js

- Add cytoscape-graph.js: fetches /graph, renders with Cytoscape.js
- Style: round-rect nodes, cose layout, edge width proportional to weight
- Click: center node + fade rest (wineandcheesemap effect)
- Double-click: trigger navigation callback
- Hover: tooltip with preview text
- Click background: restore all
- Remove gioser-graph-web crate dependency (no longer needed)
- Add CDN cytoscape@3.30.4 + defer script to index.html
- gioser-graph custom element auto-initialized on mount

crates/apps/gioser-web/Cargo.toml

@@ -14,7 +14,6 @@ gioser-canvas-web = { path = "../../modules/gioser/gioser-canvas-web" }
 fana-md-reader-web = { path = "../../modules/fana/fana-md-reader-web" }
 revista-web = { path = "../../modules/revista/revista-web" }
 barra-web = { path = "../../modules/barra/barra-web" }
-gioser-graph-web = { path = "../../modules/gioser/gioser-graph-web" }
 wasm-bindgen.workspace = true
 wasm-bindgen-futures.workspace = true
 js-sys.workspace = true