remove vars file usage; rename FE variables

[iignatevich]

No description provided.

[davidferlay]

Overall all good ! Although I faced an issue when launching web ui with no variables key in config file:

➜  ski-platform git:(master) plasmactlx web --ui-assets=/home/dferlay/Sources/launchr/web/client/dist --foreground --keyring-passphrase-file /tmp/kp
                             
 INFO  You can reach the web server at this URL: http://localhost:8080
2025/06/30 11:30:58 http: panic serving [::1]:46118: assignment to entry in nil map
goroutine 27 [running]:
net/http.(*conn).serve.func1()
	net/http/server.go:1947 +0xbe
panic({0x22213c0?, 0x41a3b70?})
	runtime/panic.go:792 +0x132
github.com/launchrctl/web/server.(*launchrServer).GetCustomisationConfig(0x10?, {0x2d02380, 0xc000232700}, 0xc00056f900?)
	github.com/launchrctl/[email protected]/server/api.go:58 +0xac
github.com/launchrctl/web/server.(*ServerInterfaceWrapper).GetCustomisationConfig.func1({0x2d02380?, 0xc000232700?}, 0x1?)
	github.com/launchrctl/[email protected]/server/openapi.gen.go:505 +0x35
net/http.HandlerFunc.ServeHTTP(0x1?, {0x2d02380?, 0xc000232700?}, 0x1?)
	net/http/server.go:2294 +0x29
github.com/launchrctl/web/server.(*ServerInterfaceWrapper).GetCustomisationConfig(0xc0005564b0, {0x2d02380, 0xc000232700}, 0xc00027a640)
	github.com/launchrctl/[email protected]/server/openapi.gen.go:512 +0xc5
net/http.HandlerFunc.ServeHTTP(0xc0003245a0?, {0x2d02380?, 0xc000232700?}, 0x0?)
	net/http/server.go:2294 +0x29
github.com/go-chi/chi/v5.(*ChainHandler).ServeHTTP(0xc0006422d0?, {0x2d02380?, 0xc000232700?}, 0xc00035e184?)
	github.com/go-chi/chi/[email protected]/chain.go:31 +0x26
github.com/go-chi/chi/v5.(*Mux).routeHTTP(0xc00004e300, {0x2d02380, 0xc000232700}, 0xc00027a640)
	github.com/go-chi/chi/[email protected]/mux.go:480 +0x2e2
net/http.HandlerFunc.ServeHTTP(0xc000021ea0?, {0x2d02380?, 0xc000232700?}, 0xc00027a640?)
	net/http/server.go:2294 +0x29
github.com/go-chi/cors.(*Cors).Handler-fm.(*Cors).Handler.func1({0x2d02380, 0xc000232700}, 0xc00027a640)
	github.com/go-chi/[email protected]/cors.go:228 +0x17e
net/http.HandlerFunc.ServeHTTP(0x2d17e08?, {0x2d02380?, 0xc000232700?}, 0x41a57a0?)
	net/http/server.go:2294 +0x29
github.com/go-chi/chi/v5.(*Mux).ServeHTTP(0xc00004e300, {0x2d02380, 0xc000232700}, 0xc00027a500)
	github.com/go-chi/chi/[email protected]/mux.go:90 +0x2ee
net/http.serverHandler.ServeHTTP({0xc00065a8a0?}, {0x2d02380?, 0xc000232700?}, 0x6?)
	net/http/server.go:3301 +0x8e
net/http.(*conn).serve(0xc00061e480, {0x2d17dd0, 0xc0005567e0})
	net/http/server.go:2102 +0x625
created by net/http.(*Server).Serve in goroutine 1
	net/http/server.go:3454 +0x485

User would expect webui to launch successfully and use default values in that case

Using config with:

web:
  variables: []

works successfully though