방 입장 QR코드 추가

package-lock.json

@@ -10,12 +10,14 @@
       "dependencies": {
         "peerjs": "^1.5.5",
         "pinia": "^3.0.4",
+        "qrcode": "^1.5.4",
         "vue": "^3.5.38",
         "vue-router": "^5.1.0"
       },
       "devDependencies": {
         "@tsconfig/node24": "^24.0.4",
         "@types/node": "^24.13.2",
+        "@types/qrcode": "^1.5.6",
         "@vitejs/plugin-vue": "^6.0.7",
         "@vue/tsconfig": "^0.9.1",
         "npm-run-all2": "^9.0.2",
@@ -903,6 +905,16 @@
         "undici-types": "~7.18.0"
       }
     },
+    "node_modules/@types/qrcode": {
+      "version": "1.5.6",
+      "resolved": "https://registry.npmjs.org/@types/qrcode/-/qrcode-1.5.6.tgz",
+      "integrity": "sha512-te7NQcV2BOvdj2b1hCAHzAoMNuj65kNBMz0KBaxM6c3VGBOhU0dURQKOtH8CFNI/dsKkwlv32p26qYQTWoB5bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@vitejs/plugin-vue": {
       "version": "6.0.7",
       "resolved": "https://registry.npmjs.org/@vitejs/plugin-vue/-/plugin-vue-6.0.7.tgz",
@@ -1257,6 +1269,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/ansi-styles": {
       "version": "6.2.3",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.3.tgz",
@@ -1385,6 +1406,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/camelcase": {
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/caniuse-lite": {
       "version": "1.0.30001799",
       "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001799.tgz",
@@ -1421,6 +1451,35 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
+    "node_modules/cliui": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-6.0.0.tgz",
+      "integrity": "sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==",
+      "license": "ISC",
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^6.2.0"
+      }
+    },
+    "node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "~1.1.4"
+      },
+      "engines": {
+        "node": ">=7.0.0"
+      }
+    },
+    "node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "license": "MIT"
+    },
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       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/confbox/-/confbox-0.2.4.tgz",
@@ -1511,6 +1570,15 @@
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       }
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+    "node_modules/decamelize": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+      "integrity": "sha512-z2S+W9X73hAUUki+N+9Za2lBlun89zigOyGrsax+KUQ6wKW4ZoWpEYBkGhQjwAjjDCkWxhY0VKEhk8wzY7F5cA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/default-browser": {
       "version": "5.5.0",
       "resolved": "https://registry.npmjs.org/default-browser/-/default-browser-5.5.0.tgz",
@@ -1564,6 +1632,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/dijkstrajs": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/dijkstrajs/-/dijkstrajs-1.0.3.tgz",
+      "integrity": "sha512-qiSlmBq9+BCdCA/L46dw8Uy93mloxsPSbwnm5yrKn2vMPiy8KyAskTF6zuV/j5BMsmOGZDPs7KjU+mjb670kfA==",
+      "license": "MIT"
+    },
     "node_modules/electron-to-chromium": {
       "version": "1.5.376",
       "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.376.tgz",
@@ -1571,6 +1645,12 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "license": "MIT"
+    },
     "node_modules/entities": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/entities/-/entities-7.0.1.tgz",
@@ -1638,6 +1718,19 @@
         }
       }
     },
+    "node_modules/find-up": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+      "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
+      "license": "MIT",
+      "dependencies": {
+        "locate-path": "^5.0.0",
+        "path-exists": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/fsevents": {
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
@@ -1662,6 +1755,15 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/get-caller-file": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+      "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
+      "license": "ISC",
+      "engines": {
+        "node": "6.* || 8.* || >= 10.*"
+      }
+    },
     "node_modules/hookable": {
       "version": "5.5.3",
       "resolved": "https://registry.npmjs.org/hookable/-/hookable-5.5.3.tgz",
@@ -1684,6 +1786,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/is-fullwidth-code-point": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+      "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/is-in-ssh": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-in-ssh/-/is-in-ssh-1.0.0.tgz",
@@ -2081,6 +2192,18 @@
         "url": "https://github.com/sponsors/antfu"
       }
     },
+    "node_modules/locate-path": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
+      "integrity": "sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==",
+      "license": "MIT",
+      "dependencies": {
+        "p-locate": "^4.1.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/lru-cache": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-5.1.1.tgz",
@@ -2289,6 +2412,42 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/p-limit": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
+      "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
+      "license": "MIT",
+      "dependencies": {
+        "p-try": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/p-locate": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
+      "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
+      "license": "MIT",
+      "dependencies": {
+        "p-limit": "^2.2.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/p-try": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+      "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/path-browserify": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-1.0.1.tgz",
@@ -2296,6 +2455,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/path-exists": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
+      "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/path-key": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -2413,6 +2581,15 @@
         "pathe": "^2.0.3"
       }
     },
+    "node_modules/pngjs": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/pngjs/-/pngjs-5.0.0.tgz",
+      "integrity": "sha512-40QW5YalBNfQo5yRYmiw7Yz6TKKVr3h6970B2YE+3fQpsWcrbj1PzJgxeJ19DRQjhMbKPIuMY8rFaXc8moolVw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/postcss": {
       "version": "8.5.15",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.15.tgz",
@@ -2454,6 +2631,23 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/qrcode": {
+      "version": "1.5.4",
+      "resolved": "https://registry.npmjs.org/qrcode/-/qrcode-1.5.4.tgz",
+      "integrity": "sha512-1ca71Zgiu6ORjHqFBDpnSMTR2ReToX4l1Au1VFLyVeBTFavzQnv5JxMFr3ukHVKpSrSA2MCk0lNJSykjUfz7Zg==",
+      "license": "MIT",
+      "dependencies": {
+        "dijkstrajs": "^1.0.1",
+        "pngjs": "^5.0.0",
+        "yargs": "^15.3.1"
+      },
+      "bin": {
+        "qrcode": "bin/qrcode"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/quansync": {
       "version": "0.2.11",
       "resolved": "https://registry.npmjs.org/quansync/-/quansync-0.2.11.tgz",
@@ -2497,6 +2691,21 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
+    "node_modules/require-directory": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
+      "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/require-main-filename": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
+      "license": "ISC"
+    },
     "node_modules/rfdc": {
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@@ -2572,6 +2781,12 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "license": "ISC"
+    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
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@@ -2641,6 +2856,32 @@
         "node": ">=0.10.0"
       }
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+    "node_modules/string-width": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "license": "MIT",
+      "dependencies": {
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
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       "version": "2.2.6",
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@@ -3225,6 +3466,41 @@
         "node": "^22.22.2 || ^24.15.0 || >=26.0.0"
       }
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+    "node_modules/which-module": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.1.tgz",
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+      "license": "ISC"
+    },
+    "node_modules/wrap-ansi": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
+      "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=8"
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+    },
+    "node_modules/wrap-ansi/node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
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@@ -3242,6 +3518,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/y18n": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
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+      "license": "ISC"
+    },
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@@ -3263,6 +3545,41 @@
       "funding": {
         "url": "https://github.com/sponsors/eemeli"
       }
+    },
+    "node_modules/yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      },
+      "engines": {
+        "node": ">=8"
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+    },
+    "node_modules/yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "license": "ISC",
+      "dependencies": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
     }
   }
 }

package.json

@@ -13,12 +13,14 @@
   "dependencies": {
     "peerjs": "^1.5.5",
     "pinia": "^3.0.4",
+    "qrcode": "^1.5.4",
     "vue": "^3.5.38",
     "vue-router": "^5.1.0"
   },
   "devDependencies": {
     "@tsconfig/node24": "^24.0.4",
     "@types/node": "^24.13.2",
+    "@types/qrcode": "^1.5.6",
     "@vitejs/plugin-vue": "^6.0.7",
     "@vue/tsconfig": "^0.9.1",
     "npm-run-all2": "^9.0.2",

src/components/RoomJoinQr.vue

@@ -0,0 +1,120 @@
+<script setup lang="ts">
+import { ref, watch } from 'vue'
+import QRCode from 'qrcode'
+import { buildLobbyJoinUrl } from '@/utils/joinUrl'
+import { copyToClipboard } from '@/utils/clipboard'
+
+const props = defineProps<{
+  roomCode: string
+}>()
+
+const dataUrl = ref('')
+const joinUrl = ref('')
+const copyStatus = ref<'idle' | 'copied' | 'failed'>('idle')
+
+async function renderQr() {
+  if (!props.roomCode) {
+    dataUrl.value = ''
+    joinUrl.value = ''
+    return
+  }
+
+  joinUrl.value = buildLobbyJoinUrl(props.roomCode)
+  dataUrl.value = await QRCode.toDataURL(joinUrl.value, {
+    width: 220,
+    margin: 2,
+    color: { dark: '#1a1a2e', light: '#ffffff' },
+  })
+}
+
+watch(() => props.roomCode, renderQr, { immediate: true })
+
+async function copyUrl() {
+  if (!joinUrl.value) return
+  const ok = await copyToClipboard(joinUrl.value)
+  copyStatus.value = ok ? 'copied' : 'failed'
+  setTimeout(() => { copyStatus.value = 'idle' }, 2000)
+}
+</script>
+
+<template>
+  <div v-if="roomCode" class="join-qr">
+    <p class="label">QR로 참가</p>
+    <img
+      v-if="dataUrl"
+      :src="dataUrl"
+      alt="방 참가 QR 코드"
+      class="qr-image"
+      width="220"
+      height="220"
+    />
+    <p class="url">{{ joinUrl }}</p>
+    <button
+      type="button"
+      class="copy-btn"
+      :class="{ copied: copyStatus === 'copied', failed: copyStatus === 'failed' }"
+      @click="copyUrl"
+    >
+      {{ copyStatus === 'copied' ? '복사됨!' : copyStatus === 'failed' ? '실패' : 'URL 복사' }}
+    </button>
+  </div>
+</template>
+
+<style scoped>
+.join-qr {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  user-select: none;
+  -webkit-user-select: none;
+}
+
+.label {
+  font-size: 0.85rem;
+  color: #888;
+}
+
+.qr-image {
+  display: block;
+  border-radius: 12px;
+  background: #fff;
+  padding: 8px;
+}
+
+.url {
+  font-size: 0.75rem;
+  color: #888;
+  word-break: break-all;
+  line-height: 1.4;
+  max-width: 100%;
+}
+
+.copy-btn {
+  padding: 8px 16px;
+  border-radius: 8px;
+  border: 1px solid #555;
+  background: rgba(42, 42, 74, 0.9);
+  color: #ccc;
+  font-size: 0.85rem;
+  font-weight: 600;
+  cursor: pointer;
+  -webkit-tap-highlight-color: transparent;
+  touch-action: manipulation;
+}
+
+.copy-btn:active {
+  background: #3d3560;
+}
+
+.copy-btn.copied {
+  border-color: #27ae60;
+  color: #27ae60;
+}
+
+.copy-btn.failed {
+  border-color: #e74c3c;
+  color: #e74c3c;
+}
+</style>

src/utils/joinUrl.ts

@@ -0,0 +1,19 @@
+/** 로비 참가 URL (?room=방코드) */
+export const ROOM_QUERY_KEY = 'room'
+
+export function buildLobbyJoinUrl(roomCode: string): string {
+  const base = import.meta.env.BASE_URL.replace(/\/?$/, '/')
+  const path = `${base}onecard/lobby`.replace(/\/+/g, '/')
+  const url = new URL(path, window.location.origin)
+  url.searchParams.set(ROOM_QUERY_KEY, roomCode.trim().toUpperCase())
+  return url.toString()
+}
+
+export function parseRoomCodeFromQuery(
+  query: Record<string, unknown>,
+): string | null {
+  const raw = query[ROOM_QUERY_KEY]
+  const value = Array.isArray(raw) ? raw[0] : raw
+  const code = typeof value === 'string' ? value.trim().toUpperCase() : ''
+  return code.length === 6 ? code : null
+}

src/views/onecard/OneCardLobbyView.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { ref, computed, watch, onMounted } from 'vue'
-import { useRouter } from 'vue-router'
+import { useRouter, useRoute } from 'vue-router'
 import { useRoomStore } from '@/stores/roomStore'
 import { usePeerRoom } from '@/composables/usePeerRoom'
 import {
@@ -13,10 +13,13 @@ import {
 } from '@/utils/session'
 import HomeButton from '@/components/HomeButton.vue'
 import RoomCodeDisplay from '@/components/RoomCodeDisplay.vue'
+import RoomJoinQr from '@/components/RoomJoinQr.vue'
+import { parseRoomCodeFromQuery, ROOM_QUERY_KEY } from '@/utils/joinUrl'
 import { MAX_PLAYERS } from '@/utils/boardLayout'
 import type { RoomRole } from '@/games/onecard/types'
 
 const router = useRouter()
+const route = useRoute()
 const store = useRoomStore()
 const { hostRoom, joinRoom, destroy } = usePeerRoom()
 
@@ -25,10 +28,27 @@ const inputCode = ref('')
 const selectedRole = ref<RoomRole>('player')
 const playerName = ref('')
 
-onMounted(() => {
+onMounted(async () => {
   playerName.value = loadSavedPlayerName()
+  await applyRoomFromQuery()
 })
 
+async function applyRoomFromQuery() {
+  const code = parseRoomCodeFromQuery(route.query)
+  if (!code) return
+
+  if (route.query[ROOM_QUERY_KEY]) {
+    router.replace({ path: route.path, query: {} })
+  }
+
+  inputCode.value = code
+  mode.value = 'join'
+
+  if (playerName.value.trim()) {
+    await joinExistingRoom()
+  }
+}
+
 watch(playerName, (name) => {
   savePlayerName(name)
 })
@@ -175,6 +195,7 @@ function leaveSubScreen() {
       <!-- 대기 화면 (보드판) -->
       <div v-else-if="mode === 'waiting'" class="waiting">
         <RoomCodeDisplay :code="localRoomCode" />
+        <RoomJoinQr :room-code="localRoomCode" />
         <p v-if="isConnecting" class="connecting">연결 중...</p>
         <p class="wait-info">
           접속: <strong>{{ deviceCount }}/{{ 1 + MAX_PLAYERS }}</strong>대