Switch auth to plain-text password env var (remove bcrypt)

- Replace ADMIN_PASSWORD_HASH with ADMIN_PASSWORD in auth route and docker-compose
- Remove bcryptjs / @types/bcryptjs dependencies
- Delete scripts/hashPassword.ts (no longer needed)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package-lock.json

@@ -9,7 +9,6 @@
       "version": "1.0.0",
       "dependencies": {
         "@prisma/client": "^5.22.0",
-        "bcryptjs": "^2.4.3",
         "better-sqlite3": "^11.5.0",
         "cookie-parser": "^1.4.7",
         "cors": "^2.8.5",
@@ -18,7 +17,6 @@
         "jsonwebtoken": "^9.0.2"
       },
       "devDependencies": {
-        "@types/bcryptjs": "^2.4.6",
         "@types/better-sqlite3": "^7.6.12",
         "@types/cookie-parser": "^1.4.8",
         "@types/cors": "^2.8.17",
@@ -1098,13 +1096,6 @@
         "win32"
       ]
     },
-    "node_modules/@types/bcryptjs": {
-      "version": "2.4.6",
-      "resolved": "https://registry.npmjs.org/@types/bcryptjs/-/bcryptjs-2.4.6.tgz",
-      "integrity": "sha512-9xlo6R2qDs5uixm0bcIqCeMCE6HiQsIyel9KQySStiyqNl2tnj2mP3DX1Nf56MD6KMenNNlBBsy3LJ7gUEQPXQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/@types/better-sqlite3": {
       "version": "7.6.13",
       "resolved": "https://registry.npmjs.org/@types/better-sqlite3/-/better-sqlite3-7.6.13.tgz",
@@ -1541,12 +1532,6 @@
       ],
       "license": "MIT"
     },
-    "node_modules/bcryptjs": {
-      "version": "2.4.3",
-      "resolved": "https://registry.npmjs.org/bcryptjs/-/bcryptjs-2.4.3.tgz",
-      "integrity": "sha512-V/Hy/X9Vt7f3BbPJEi8BdVFMByHi+jNXrYkW3huaybV/kQ0KJg0Y6PkEMbn+zeT+i+SiKZ/HMqJGIIt4LZDqNQ==",
-      "license": "MIT"
-    },
     "node_modules/better-sqlite3": {
       "version": "11.10.0",
       "resolved": "https://registry.npmjs.org/better-sqlite3/-/better-sqlite3-11.10.0.tgz",