fix: use rust blowfish instead of node

The JavaScript blowfish-node library had a critical bug where it would
sometimes return 2047 bytes instead of 2048 during decryption, causing
byte alignment issues that corrupted FLAC audio at specific intervals
(~every 32/82 seconds).

Changes:
- Add Rust dependencies: blowfish, md5, byteorder
- Implement new module in Rust with proper Blowfish CBC
- Add decryption Tauri command
- Update frontend to call Rust decryption instead of JavaScript
- Remove buggy JavaScript blowfish implementation
- Update decryption algorithm (6144-byte windows)

bun.lock

@@ -13,7 +13,6 @@
         "@tauri-apps/plugin-process": "~2",
         "@tauri-apps/plugin-sql": "^2.3.0",
         "@tauri-apps/plugin-store": "~2",
-        "blowfish-node": "^1.1.4",
         "music-metadata": "^11.9.0",
         "uuid": "^13.0.0",
       },
@@ -208,8 +207,6 @@
 
     "axobject-query": ["axobject-query@4.1.0", "", {}, "sha512-qIj0G9wZbMGNLjLmg1PT6v2mE9AH2zlnADJD/2tC6E00hgmhUOfEB6greHPAfLRSufHqROIUTkw6E+M3lH0PTQ=="],
 
-    "blowfish-node": ["blowfish-node@1.1.4", "", {}, "sha512-Iahpxc/cutT0M0tgwV5goklB+EzDuiYLgwJg050AmUG2jSIOpViWMLdnRgBxzZuNfswAgHSUiIdvmNdgL2v6DA=="],
-
     "chokidar": ["chokidar@4.0.3", "", { "dependencies": { "readdirp": "^4.0.1" } }, "sha512-Qgzu8kfBvo+cA4962jnP1KkS6Dop5NS6g7R5LFYJr4b8Ub94PPQXUksCw9PvXoeXPRRddRNC5C1JQUR2SMGtnA=="],
 
     "clsx": ["clsx@2.1.1", "", {}, "sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA=="],