feat: frontend shell — project picker, legend, modals (new project / cable type / delete), URL ?project= state

web/web.go

@@ -0,0 +1,23 @@
+// Package web bundles the frontend (HTML/JS/CSS) into the Go binary
+// via embed.FS so deploying mCables means shipping one file.
+package web
+
+import (
+	"embed"
+	"io/fs"
+)
+
+//go:embed all:static
+var assets embed.FS
+
+// Static returns the frontend filesystem rooted at the package's static/
+// dir so callers see index.html at "/".
+func Static() fs.FS {
+	sub, err := fs.Sub(assets, "static")
+	if err != nil {
+		// embed sub-rooting can only fail if "static" doesn't exist,
+		// which is a build-time error. Panic is the right shape.
+		panic(err)
+	}
+	return sub
+}