Merge pull request '其它: 移除主页说明失效的链接、更名 `.github` 到 `.gitlab`、加入 issue 模板。' (#8) from jixunmoe/um-web:docs/cleanup-readme into master

Reviewed-on: https://git.unlock-music.dev/um/web/pulls/8

Merge pull request 'Add Tag Edit Function & Wasm for Qmc & Kgm' (#5) from xhacker-zzz/web:master into master

Reviewed-on: https://git.unlock-music.dev/um/web/pulls/5

Merge pull request '优化 QMCCache 解密过程' (#6) from jixunmoe/um-web:refactor/optimise-qm-cache-decode into master

Reviewed-on: https://git.unlock-music.dev/um/web/pulls/6

Merge pull request '不依赖远端文件实现 KGM 解锁（内嵌 ~1K 的 mask 表数据）' (#2) from jixunmoe/um-web:master into master

Reviewed-on: https://git.unlock-music.dev/um/web/pulls/2

(cherry picked from commit eb9f7bc003ecaa755240330b2ea32f743be270df)

+ fix: 暗黑模式 一些小问题
+ 一些 scss 通用方法

(cherry picked from commit 8c149b6fa82dde3d2c03c236c699939154c65508)

(cherry picked from commit f7b5e25277678ae0f78a186aaf2fa76fee86173f)

(cherry picked from commit c48dbd8a350d0df22e997ccf9fbdc4e889ddd379)

(cherry picked from commit 49c53a9c65dc8aa37a9b7413ab937854ecc1c20a)

(cherry picked from commit eb6be0d9d13a0834b6a7ada9aab846cfbbdfd664)