Using `"fullstack"` feature is not equivalent to using it separately for server and web client

**Problem**

I want to only use Dioxus Fullstack for the Web platform, so I have to separately add fullstack to the web and server features, but this disables the fullstack, i.e., the build is broken/not working in the end.


Even though this is [not the expected usage](https://discord.com/channels/899851952891002890/928812591126569000/1319364607122341988), I think it's valid, since it reduces the bloat during development for other platforms and for the release binaries for these platforms.

**Steps To Reproduce**

Steps to reproduce the behavior:

- `dx new test --subtemplate Bare-Bones -o is_fullstack=false -o is_router=false -o is_tailwind=false -o default_platform=web`
- `cd test`
- `sed '/default/d' Cargo.toml | sd 'web"]' 'web", "dioxus/fullstack"]' | sed '/web/iserver = ["dioxus/server", "dioxus/fullstack"]' | sponge Cargo.toml`
- `dx serve --platform web`

**Expected behavior**

It should be the same as doing
- `dx new test --subtemplate Bare-Bones -o is_fullstack=true -o is_router=false -o is_tailwind=false -o default_platform=web`
- `cd test`
- `dx serve --platform web`


**Environment:**
- Dioxus version: v0.6.1
- Rust version: rustc 1.83.0-nightly (fb4aebddd 2024-09-30)
- OS info: Pop!_OS 22.04
- App platform: web

**Questionnaire**

I'm interested in fixing this myself but don't know where to start.
I don't have time to fix this right now, but maybe later.