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)

(cherry picked from commit 191ac6a932efb290f49e2824839db20ac6ff47ca)