CSS changes are not detected when manually injecting (HMR?)

[42willow]

Describe the bug

I am manually injecting a CSS file located within entrypoints/

entrypoints/content.ts

import "./some.css";
// if the above line isn't included, then a change in that file will not trigger a reload
// if the above line is included, then a change in that file will trigger a reload, but not update the contents of the css file
// to actually update the css, you have to quit wxt entirely and start a new dev server

export default defineContentScript({
  matches: ['*://example.com/*'],
  cssInjectionMode: "manual", // this line doesn't seem to make a difference, unless the lines 12-17 are commented out, in which case it prevents styles from being injected
  main() {
    console.log('Hello content.');
    // if the below lines are commented out (and line 9, css injection mode), the issue is fixed
    // let link = document.createElement("link");
    // link.rel = "stylesheet";
    // link.href = browser.runtime.getURL("/assets/some.css" as any);
    // link.classList.add("schooltape");
    // document.head.appendChild(link);
  },
});

May be related to #386

Reproduction

1. clone https://github.com/42Willow/wxt-css-reload-bug-repro and cd
2. pnpm install
3. pnpm run dev
4. navigate to https://example.com
5. modify entrypoints/some.css - extension reloads but styles are not changed

It doesn't seem to have any effect on whether the css file is explicitly imported into the content script or not, only that the extension only reloads if there is a change and the css file has been imported by the content script. Is this intended behaviour? as the css file is located within entrypoints/

Steps to reproduce

built files are located in dist/ of the repo provided above (output of pnpm dev)

System Info

System:
    OS: Linux 6.6 NixOS 24.11 (Vicuna) 24.11 (Vicuna)
    CPU: (8) x64 Intel(R) Core(TM) i5-10210U CPU @ 1.60GHz
    Memory: 9.29 GB / 15.26 GB
    Container: Yes
    Shell: 0.98.0 - /run/current-system/sw/bin/nu
  Binaries:
    Node: 20.17.0 - /etc/profiles/per-user/willow/bin/node
    npm: 10.8.2 - /etc/profiles/per-user/willow/bin/npm
    pnpm: 9.10.0 - /etc/profiles/per-user/willow/bin/pnpm
    bun: 1.1.29 - /etc/profiles/per-user/willow/bin/bun
  Browsers:
    Chromium: 129.0.6668.89
  npmPackages:
    wxt: ^0.19.11 => 0.19.11

Used Package Manager

pnpm

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