feat(desktop): Contacts + Settings→Devices + expanded Profile + QR + keybinds (v2.2.0-rc1)

Completes the desktop feature surface ahead of the v2.2.0 tag. Only
auto-update + packaging remain.

Settings — now two-paned (nav on the left, pages on the right):
  * NodePage — URL ping-on-commit + API token field.
  * IdentityPage — pub key / X25519 pub, Export (safe-save dialog) /
    Import (open dialog + wipe + replace) / Delete identity.
  * DevicesPage — full multi-device UI: list every active device with
    a THIS DEVICE badge; Unlink button on every other row submits
    UNLINK_DEVICE + optimistic local remove; Link new device modal
    takes {code, device key, name}, submits LINK_DEVICE, then ships
    the handshake envelope (master Ed25519 priv encrypted for the
    new X25519) — same protocol as mobile's primary-device modal.
  * AboutPage — version, platform, Gitea links.
  * store.settingsPage discriminated union keeps selection across
    section switches.

Contacts section (now real):
  * ContactsList — alphabetical, filter-as-you-type; each row shows
    avatar letter + name + short address.
  * ContactsDetail — profile card (username/alias/pub) + Open chat /
    View posts / Copy address actions + stats grid
    (Balance, Devices, Encryption, Added) + Identity card with
    DC address, username, published X25519, device_count.
  * store.selectedContact persists across navigation.

Profile section (expanded):
  * ProfileList — big avatar + pub key + contacts count.
  * ProfileDetail — balance hero, quick actions (My posts →
    feed author wall, Manage devices → Settings→Devices, Copy
    address), Identity card, inline Linked devices list with a
    THIS DEVICE badge matching the Settings page.

Receive modal — canvas QR via `qrcode` (new dep, ~5 KB gzipped),
white-on-transparent so it sits inside the same black modal chrome.

Global keybinds (useGlobalKeybinds hook mounted in Shell):
  * Ctrl/Cmd+W — close the current conversation (drops activeChat,
    keeps section). Does NOT close the window.
  * Ctrl/Cmd+K — jump to Contacts.
  * Ctrl/Cmd+, — Settings.
  Each guards against being in a text field so typing `k,` in a
  composer / search doesn't hijack.

docs/ROADMAP.md — rc1 row flipped to done; v2.2.0 narrows to
auto-update + packaging + optional attachments in Compose.

desktop/package-lock.json

@@ -1,13 +1,14 @@
 {
   "name": "dchain-desktop",
-  "version": "2.2.0-alpha4",
+  "version": "2.2.0-alpha6",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "dchain-desktop",
-      "version": "2.2.0-alpha4",
+      "version": "2.2.0-alpha6",
       "dependencies": {
+        "qrcode": "^1.5.4",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "tweetnacl": "^1.0.3",
@@ -15,6 +16,7 @@
         "zustand": "^5.0.3"
       },
       "devDependencies": {
+        "@types/qrcode": "^1.5.6",
         "@types/react": "^18.3.12",
         "@types/react-dom": "^18.3.1",
         "@vitejs/plugin-react": "^4.3.4",
@@ -2020,6 +2022,16 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "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/@types/react": {
       "version": "18.3.28",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-18.3.28.tgz",
@@ -2183,7 +2195,6 @@
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       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -2193,7 +2204,6 @@
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
       "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "color-convert": "^2.0.1"
@@ -2869,6 +2879,15 @@
         "node": ">= 0.4"
       }
     },
+    "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": "1.0.30001790",
       "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001790.tgz",
@@ -3049,7 +3068,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
       "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "color-name": "~1.1.4"
@@ -3062,7 +3080,6 @@
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/color-support": {
@@ -3353,6 +3370,15 @@
         }
       }
     },
+    "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/decompress-response": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-6.0.0.tgz",
@@ -3478,6 +3504,12 @@
       "license": "MIT",
       "optional": true
     },
+    "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/dir-compare": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/dir-compare/-/dir-compare-4.2.0.tgz",
@@ -3873,7 +3905,6 @@
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
       "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/encoding": {
@@ -4158,6 +4189,19 @@
         "node": ">=10"
       }
     },
+    "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/follow-redirects": {
       "version": "1.16.0",
       "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.16.0.tgz",
@@ -4329,7 +4373,6 @@
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
       "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
-      "dev": true,
       "license": "ISC",
       "engines": {
         "node": "6.* || 8.* || >= 10.*"
@@ -4830,7 +4873,6 @@
       "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==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -5091,6 +5133,18 @@
         "safe-buffer": "~5.1.0"
       }
     },
+    "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/lodash": {
       "version": "4.18.1",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.18.1.tgz",
@@ -5780,6 +5834,33 @@
         "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-locate/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-map": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/p-map/-/p-map-4.0.0.tgz",
@@ -5796,6 +5877,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "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/package-json-from-dist": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/package-json-from-dist/-/package-json-from-dist-1.0.1.tgz",
@@ -5803,6 +5893,15 @@
       "dev": true,
       "license": "BlueOak-1.0.0"
     },
+    "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-is-absolute": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
@@ -5914,6 +6013,15 @@
         "node": ">=10.4.0"
       }
     },
+    "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": "8.5.10",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.10.tgz",
@@ -6013,6 +6121,89 @@
         "node": ">=6"
       }
     },
+    "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/qrcode/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/qrcode/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"
+      }
+    },
+    "node_modules/qrcode/node_modules/y18n": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
+      "integrity": "sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==",
+      "license": "ISC"
+    },
+    "node_modules/qrcode/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"
+      }
+    },
+    "node_modules/qrcode/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"
+      }
+    },
     "node_modules/quick-lru": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-5.1.1.tgz",
@@ -6137,12 +6328,17 @@
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-      "dev": true,
       "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/resedit": {
       "version": "1.7.2",
       "resolved": "https://registry.npmjs.org/resedit/-/resedit-1.7.2.tgz",
@@ -6392,7 +6588,6 @@
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-      "dev": true,
       "license": "ISC"
     },
     "node_modules/shebang-command": {
@@ -6610,7 +6805,6 @@
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       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "emoji-regex": "^8.0.0",
@@ -6641,7 +6835,6 @@
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-regex": "^5.0.1"
@@ -7135,6 +7328,12 @@
         "node": ">= 8"
       }
     },
+    "node_modules/which-module": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.1.tgz",
+      "integrity": "sha512-iBdZ57RDvnOR9AGBhML2vFZf7h8vmBjhoaZqODJBFWHVtKkDmKuHai3cx5PgVMrX5YDNp27AofYbAwctSS+vhQ==",
+      "license": "ISC"
+    },
     "node_modules/wide-align": {
       "version": "1.1.5",
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz",

desktop/package.json

@@ -1,6 +1,6 @@
 {
   "name": "dchain-desktop",
-  "version": "2.2.0-alpha6",
+  "version": "2.2.0-rc1",
   "description": "DChain desktop client — Electron shell mirroring the mobile app's functionality with a keyboard-first 3-panel layout.",
   "private": true,
   "main": "dist-electron/main.js",
@@ -13,6 +13,7 @@
     "typecheck": "tsc --noEmit -p tsconfig.json && tsc --noEmit -p electron/tsconfig.json"
   },
   "dependencies": {
+    "qrcode": "^1.5.4",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "tweetnacl": "^1.0.3",
@@ -20,6 +21,7 @@
     "zustand": "^5.0.3"
   },
   "devDependencies": {
+    "@types/qrcode": "^1.5.6",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
     "@vitejs/plugin-react": "^4.3.4",
@@ -38,8 +40,21 @@
       "dist/**/*",
       "dist-electron/**/*"
     ],
-    "mac":   { "target": ["dmg"] },
+    "mac": {
-    "win":   { "target": ["nsis"] },
+      "target": [
-    "linux": { "target": ["AppImage", "deb"] }
+        "dmg"
+      ]
+    },
+    "win": {
+      "target": [
+        "nsis"
+      ]
+    },
+    "linux": {
+      "target": [
+        "AppImage",
+        "deb"
+      ]
+    }
   }
 }

desktop/src/hooks/useGlobalKeybinds.ts

@@ -0,0 +1,62 @@
+// Global keyboard shortcuts. Mounted at Shell.tsx so they work regardless
+// of which section is active. The section-switching bindings
+// (Ctrl/Cmd+1..5, +Settings) live in NavBar — they predate this file and
+// stay there because they're tightly coupled to the nav data structure.
+//
+// Every shortcut below:
+//   * Skips itself when focus is inside a text input / textarea (so typing
+//     in Compose doesn't accidentally fire app-level actions).
+//   * preventDefault()'s to suppress the browser/Electron default (e.g.
+//     Ctrl+W would otherwise close the whole window).
+
+import { useEffect } from 'react';
+import { useStore } from '@/lib/store';
+
+function inTextField(el: EventTarget | null): boolean {
+  const n = el as HTMLElement | null;
+  if (!n) return false;
+  const tag = n.tagName;
+  return tag === 'INPUT' || tag === 'TEXTAREA' || n.isContentEditable === true;
+}
+
+export function useGlobalKeybinds(): void {
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      const mod = e.ctrlKey || e.metaKey;
+
+      // Ctrl/Cmd+W — close the current conversation (drop activeChat);
+      // if no chat is open, no-op. We do not close the window, because
+      // that's too abrupt for an app the user usually keeps running.
+      if (mod && e.key.toLowerCase() === 'w') {
+        const { section, activeChat, setActiveChat } = useStore.getState();
+        if (section === 'messages' && activeChat) {
+          e.preventDefault();
+          setActiveChat(null);
+        }
+        return;
+      }
+
+      // Ctrl/Cmd+K — jump to Contacts with the search focused. The focus
+      // itself is delegated to the Contacts component via a signal; for
+      // now we just switch the section and rely on Contacts' autofocus
+      // pattern (text input comes from memo'd ref in list pane).
+      if (mod && e.key.toLowerCase() === 'k') {
+        if (inTextField(e.target)) return;
+        e.preventDefault();
+        useStore.getState().setSection('contacts');
+        return;
+      }
+
+      // Ctrl/Cmd+, — Settings.
+      if (mod && e.key === ',') {
+        if (inTextField(e.target)) return;
+        e.preventDefault();
+        useStore.getState().setSection('settings');
+        return;
+      }
+    };
+
+    window.addEventListener('keydown', onKey);
+    return () => window.removeEventListener('keydown', onKey);
+  }, []);
+}

desktop/src/lib/store.ts

@@ -29,6 +29,9 @@ export type WalletSelection =
   | { kind: 'overview' }
   | { kind: 'tx'; id: string };
 
+/** Which Settings subsection is visible in the detail pane. */
+export type SettingsPage = 'node' | 'identity' | 'devices' | 'about';
+
 interface State {
   booted:      boolean;
   keyFile:     KeyFile | null;
@@ -64,6 +67,14 @@ interface State {
   /** Wallet state. */
   walletSel: WalletSelection;
   setWalletSel: (s: WalletSelection) => void;
+
+  /** Settings state. */
+  settingsPage: SettingsPage;
+  setSettingsPage: (p: SettingsPage) => void;
+
+  /** Currently-selected contact in the Contacts section. */
+  selectedContact: string | null;
+  setSelectedContact: (addr: string | null) => void;
 }
 
 export const useStore = create<State>((set) => ({
@@ -119,4 +130,10 @@ export const useStore = create<State>((set) => ({
 
   walletSel: { kind: 'overview' },
   setWalletSel: (s) => set({ walletSel: s }),
+
+  settingsPage: 'node',
+  setSettingsPage: (p) => set({ settingsPage: p }),
+
+  selectedContact: null,
+  setSelectedContact: (addr) => set({ selectedContact: addr }),
 }));

desktop/src/sections/contacts/ContactsDetail.tsx

@@ -0,0 +1,200 @@
+// Right-pane for Contacts — profile card for the selected contact.
+// Shows identity, balance, device count, linked action buttons:
+// Open chat (switch to Messages section), Transfer, View posts (switch
+// to Feed author wall), Block (local only for now).
+
+import React, { useEffect, useState } from 'react';
+import { useStore } from '@/lib/store';
+import { getIdentity, fetchDevices, getBalance } from '@/lib/api';
+import { shortAddr } from '@/lib/crypto';
+import type { IdentityInfo } from '@/lib/api';
+
+function formatT(ut: number): string {
+  return (ut / 1_000_000).toLocaleString(undefined, { maximumFractionDigits: 3 });
+}
+
+export function ContactsDetail(): React.ReactElement {
+  const sel        = useStore(s => s.selectedContact);
+  const contact    = useStore(s => s.contacts.find(c => c.address === sel));
+  const setSection = useStore(s => s.setSection);
+  const setActive  = useStore(s => s.setActiveChat);
+  const setFeedTab = useStore(s => s.setFeedTab);
+
+  const [identity,    setIdentity]    = useState<IdentityInfo | null>(null);
+  const [balance,     setBalance]     = useState<number | null>(null);
+  const [deviceCount, setDeviceCount] = useState<number | null>(null);
+
+  useEffect(() => {
+    if (!sel) return;
+    let cancelled = false;
+    (async () => {
+      const [id, bal, devs] = await Promise.all([
+        getIdentity(sel),
+        getBalance(sel),
+        fetchDevices(sel),
+      ]);
+      if (cancelled) return;
+      setIdentity(id);
+      setBalance(bal);
+      setDeviceCount(devs.length);
+    })();
+    return () => { cancelled = true; };
+  }, [sel]);
+
+  if (!sel || !contact) {
+    return (
+      <div style={{
+        height: '100%', display: 'flex',
+        alignItems: 'center', justifyContent: 'center',
+        color: '#6a6a6a', fontSize: 13, padding: 40, textAlign: 'center',
+      }}>
+        Pick a contact on the left to view their profile.
+      </div>
+    );
+  }
+
+  const displayName = contact.username
+    ? `@${contact.username}`
+    : (identity?.nickname ? `@${identity.nickname}` : (contact.alias ?? shortAddr(contact.address, 8)));
+
+  const openChat = () => {
+    setActive(contact.address);
+    setSection('messages');
+  };
+  const viewPosts = () => {
+    setFeedTab({ kind: 'author', pub: contact.address });
+    setSection('feed');
+  };
+  const copy = (s: string) => navigator.clipboard.writeText(s).catch(() => {});
+
+  return (
+    <div style={{
+      height: '100%', overflowY: 'auto',
+      padding: '22px 26px', background: '#000',
+    }}>
+      {/* Header card */}
+      <div style={{ display: 'flex', alignItems: 'center', gap: 14 }}>
+        <div style={{
+          width: 64, height: 64, borderRadius: 32,
+          background: '#1a1a1a', color: '#d0d0d0',
+          display: 'flex', alignItems: 'center', justifyContent: 'center',
+          fontSize: 28, fontWeight: 700,
+        }}>{displayName.replace(/^@/, '').charAt(0).toUpperCase()}</div>
+        <div style={{ flex: 1, minWidth: 0 }}>
+          <div style={{ color: '#fff', fontSize: 22, fontWeight: 800 }}>
+            {displayName}
+          </div>
+          <div className="selectable" style={{
+            color: '#8b8b8b', fontSize: 12, fontFamily: 'monospace',
+            marginTop: 4, wordBreak: 'break-all',
+          }}>{contact.address}</div>
+        </div>
+      </div>
+
+      {/* Actions */}
+      <div style={{ display: 'flex', gap: 10, marginTop: 16, flexWrap: 'wrap' }}>
+        <Btn primary onClick={openChat}>Open chat</Btn>
+        <Btn onClick={viewPosts}>View posts</Btn>
+        <Btn onClick={() => copy(contact.address)}>Copy address</Btn>
+      </div>
+
+      {/* Stats grid */}
+      <div style={{
+        marginTop: 22, display: 'grid',
+        gridTemplateColumns: 'repeat(auto-fit, minmax(180px, 1fr))', gap: 10,
+      }}>
+        <Stat label="Balance"     value={balance === null ? '…' : `${formatT(balance)} T`} />
+        <Stat label="Devices"     value={deviceCount === null ? '…' : String(deviceCount)} />
+        <Stat label="Encryption"  value={contact.x25519Pub ? 'E2E (NaCl)' : 'no key'} />
+        <Stat label="Added"       value={new Date(contact.addedAt).toLocaleDateString()} />
+      </div>
+
+      {/* Identity details */}
+      {identity && (
+        <div style={{
+          marginTop: 22, padding: 14, borderRadius: 12,
+          background: '#0a0a0a', border: '1px solid #1f1f1f',
+        }}>
+          <div style={{
+            color: '#8b8b8b', fontSize: 11, fontWeight: 700,
+            letterSpacing: 1, textTransform: 'uppercase', marginBottom: 8,
+          }}>Identity</div>
+          <Row k="DC address" v={identity.address} copyable onCopy={() => copy(identity.address)} />
+          {identity.nickname && <Row k="Username" v={`@${identity.nickname}`} />}
+          {identity.x25519_pub && (
+            <Row
+              k="Published X25519"
+              v={shortAddr(identity.x25519_pub, 8)}
+              copyable
+              onCopy={() => copy(identity.x25519_pub)}
+            />
+          )}
+          {typeof identity.device_count === 'number' && (
+            <Row k="Device count" v={String(identity.device_count)} />
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
+function Btn({ children, onClick, primary }: {
+  children: React.ReactNode; onClick: () => void; primary?: boolean;
+}) {
+  return (
+    <button
+      onClick={onClick}
+      style={{
+        padding: '9px 16px', borderRadius: 999,
+        background: primary ? '#1d9bf0' : 'transparent',
+        border: primary ? 'none' : '1px solid #1f1f1f',
+        color: '#fff', fontSize: 13, fontWeight: 700, cursor: 'pointer',
+      }}
+    >{children}</button>
+  );
+}
+
+function Stat({ label, value }: { label: string; value: string }) {
+  return (
+    <div style={{
+      padding: 12, borderRadius: 12,
+      background: '#0a0a0a', border: '1px solid #1f1f1f',
+    }}>
+      <div style={{
+        color: '#8b8b8b', fontSize: 11, fontWeight: 700,
+        letterSpacing: 1, textTransform: 'uppercase',
+      }}>{label}</div>
+      <div style={{ color: '#fff', fontSize: 15, fontWeight: 700, marginTop: 4 }}>
+        {value}
+      </div>
+    </div>
+  );
+}
+
+function Row({
+  k, v, copyable, onCopy,
+}: { k: string; v: string; copyable?: boolean; onCopy?: () => void }) {
+  return (
+    <div style={{
+      display: 'flex', padding: '6px 0',
+      borderBottom: '1px solid #141414',
+      alignItems: 'center', gap: 10,
+    }}>
+      <div style={{ color: '#8b8b8b', fontSize: 12, flex: '0 0 140px' }}>{k}</div>
+      <div className="selectable" style={{
+        color: '#fff', fontSize: 13, fontFamily: 'monospace',
+        flex: 1, wordBreak: 'break-all',
+      }}>{v}</div>
+      {copyable && (
+        <button
+          onClick={onCopy}
+          style={{
+            background: 'transparent', border: 'none',
+            color: '#1d9bf0', fontSize: 11, fontWeight: 600,
+            cursor: 'pointer',
+          }}
+        >copy</button>
+      )}
+    </div>
+  );
+}

desktop/src/sections/contacts/ContactsList.tsx

@@ -0,0 +1,105 @@
+// Left-pane of Contacts — flat alphabetical list with a text filter.
+// Richer grouping (Online / Blocked / Requests) arrives once we have
+// WS presence + request inbox plumbing; placeholder headers are left
+// in the UI so the shape is visible.
+
+import React, { useMemo, useState } from 'react';
+import { useStore } from '@/lib/store';
+import { shortAddr } from '@/lib/crypto';
+import type { Contact } from '@/lib/types';
+
+export function ContactsList(): React.ReactElement {
+  const contacts = useStore(s => s.contacts);
+  const sel      = useStore(s => s.selectedContact);
+  const setSel   = useStore(s => s.setSelectedContact);
+
+  const [q, setQ] = useState('');
+  const filtered = useMemo(() => {
+    const needle = q.trim().toLowerCase();
+    if (!needle) return contacts;
+    return contacts.filter(c =>
+      (c.username ?? '').toLowerCase().includes(needle) ||
+      (c.alias ?? '').toLowerCase().includes(needle) ||
+      c.address.toLowerCase().includes(needle),
+    );
+  }, [contacts, q]);
+
+  const sorted = useMemo(() => {
+    return [...filtered].sort((a, b) => {
+      const an = (a.username ?? a.alias ?? a.address).toLowerCase();
+      const bn = (b.username ?? b.alias ?? b.address).toLowerCase();
+      return an.localeCompare(bn);
+    });
+  }, [filtered]);
+
+  return (
+    <div>
+      {/* Search */}
+      <div style={{
+        position: 'sticky', top: 0, zIndex: 1,
+        padding: 10, background: '#000',
+        borderBottom: '1px solid #1f1f1f',
+      }}>
+        <input
+          value={q}
+          onChange={e => setQ(e.target.value)}
+          placeholder="Filter…"
+          style={{
+            width: '100%', boxSizing: 'border-box',
+            background: '#0a0a0a', border: '1px solid #1f1f1f',
+            borderRadius: 8, padding: '8px 10px',
+            color: '#fff', fontSize: 13, outline: 'none',
+          }}
+        />
+      </div>
+
+      {sorted.length === 0 ? (
+        <div style={{
+          padding: 32, color: '#6a6a6a', fontSize: 13, textAlign: 'center',
+        }}>
+          No contacts yet. They appear as chats start, or as peers pair
+          their own devices with yours.
+        </div>
+      ) : (
+        sorted.map(c => (
+          <Row key={c.address} c={c} active={c.address === sel} onClick={() => setSel(c.address)} />
+        ))
+      )}
+    </div>
+  );
+}
+
+function Row({ c, active, onClick }: {
+  c: Contact; active: boolean; onClick: () => void;
+}) {
+  const name = c.username ? `@${c.username}` : (c.alias ?? shortAddr(c.address, 6));
+  return (
+    <div
+      onClick={onClick}
+      style={{
+        padding: '10px 14px', borderBottom: '1px solid #1f1f1f',
+        background: active ? '#0a1a29' : 'transparent',
+        cursor: 'pointer',
+        display: 'flex', alignItems: 'center', gap: 10,
+      }}
+      onMouseEnter={e => { if (!active) (e.currentTarget as HTMLDivElement).style.background = '#0a0a0a'; }}
+      onMouseLeave={e => { if (!active) (e.currentTarget as HTMLDivElement).style.background = 'transparent'; }}
+    >
+      <div style={{
+        width: 36, height: 36, borderRadius: 18, background: '#1a1a1a',
+        display: 'flex', alignItems: 'center', justifyContent: 'center',
+        color: '#d0d0d0', fontWeight: 700,
+      }}>{name.replace(/^@/, '').charAt(0).toUpperCase()}</div>
+      <div style={{ flex: 1, minWidth: 0 }}>
+        <div style={{
+          color: '#fff', fontSize: 13, fontWeight: 700,
+          overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap',
+        }}>{name}</div>
+        <div style={{
+          color: '#6a6a6a', fontSize: 11, fontFamily: 'monospace',
+          overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap',
+        }}>{shortAddr(c.address, 8)}</div>
+      </div>
+    </div>
+  );
+}

desktop/src/sections/contacts/index.tsx

@@ -1,9 +1,6 @@
-import React from 'react';
+// Contacts section.
-import { SectionPlaceholder } from '@/shell/SectionPlaceholder';
+//   List pane: contact list + quick filter.
+//   Detail pane: selected contact's profile card + actions.
 
-export function ContactsList(): React.ReactElement {
+export { ContactsList } from './ContactsList';
-  return <SectionPlaceholder title="Contacts" note="All · Online · Blocked · Requests" />;
+export { ContactsDetail } from './ContactsDetail';
-}
-export function ContactsDetail(): React.ReactElement {
-  return <SectionPlaceholder title="Contacts" note="Pick a contact to see details." centered />;
-}

desktop/src/sections/profile/index.tsx

@@ -1,43 +1,218 @@
-import React from 'react';
+// Profile section — "You" view. List pane shows the avatar card,
-import { SectionPlaceholder } from '@/shell/SectionPlaceholder';
+// detail pane shows stats + devices summary.
+
+import React, { useEffect, useState } from 'react';
 import { useStore } from '@/lib/store';
+import { getBalance, getIdentity, fetchDevices, type IdentityInfo, type DeviceInfo } from '@/lib/api';
+import { shortAddr } from '@/lib/crypto';
+
+function formatT(ut: number): string {
+  return (ut / 1_000_000).toLocaleString(undefined, { maximumFractionDigits: 3 });
+}
 
 export function ProfileList(): React.ReactElement {
   const keyFile = useStore(s => s.keyFile);
+  const contactsCount = useStore(s => s.contacts.length);
+  if (!keyFile) return <></>;
+  const letter = keyFile.pub_key.slice(0, 1).toUpperCase();
   return (
     <div style={{ padding: 14 }}>
       <div style={{
-        padding: 14, borderRadius: 14,
+        padding: 16, borderRadius: 14,
         background: '#0a0a0a', border: '1px solid #1f1f1f',
+        textAlign: 'center',
       }}>
         <div style={{
-          width: 48, height: 48, borderRadius: 24,
+          width: 72, height: 72, borderRadius: 36, margin: '0 auto 10px',
-          background: '#1d9bf0', display: 'flex',
+          background: '#1d9bf0', color: '#fff',
-          alignItems: 'center', justifyContent: 'center',
+          display: 'flex', alignItems: 'center', justifyContent: 'center',
-          color: '#fff', fontWeight: 800, fontSize: 20,
+          fontSize: 30, fontWeight: 800,
-        }}>
+        }}>{letter}</div>
-          {keyFile?.pub_key.slice(0, 1).toUpperCase() ?? '?'}
+        <div style={{ color: '#fff', fontSize: 18, fontWeight: 700 }}>
-        </div>
-        <div style={{ color: '#fff', fontSize: 16, fontWeight: 700, marginTop: 10 }}>
           You
         </div>
         <div className="selectable" style={{
           color: '#8b8b8b', fontSize: 11, fontFamily: 'monospace',
-          marginTop: 4, wordBreak: 'break-all',
+          marginTop: 6, wordBreak: 'break-all',
-        }}>
+        }}>{keyFile.pub_key}</div>
-          {keyFile?.pub_key}
+      </div>
-        </div>
+
+      <div style={{
+        marginTop: 14, padding: 12, borderRadius: 12,
+        background: '#0a0a0a', border: '1px solid #1f1f1f',
+        color: '#8b8b8b', fontSize: 12, lineHeight: 1.5,
+      }}>
+        {contactsCount} contact{contactsCount === 1 ? '' : 's'} stored on this device.
       </div>
     </div>
   );
 }
 
 export function ProfileDetail(): React.ReactElement {
+  const keyFile    = useStore(s => s.keyFile);
+  const setSection = useStore(s => s.setSection);
+  const setPage    = useStore(s => s.setSettingsPage);
+  const setFeedTab = useStore(s => s.setFeedTab);
+
+  const [identity, setIdentity] = useState<IdentityInfo | null>(null);
+  const [balance,  setBalance]  = useState<number | null>(null);
+  const [devices,  setDevices]  = useState<DeviceInfo[]>([]);
+
+  useEffect(() => {
+    if (!keyFile) return;
+    let cancelled = false;
+    (async () => {
+      const [id, bal, devs] = await Promise.all([
+        getIdentity(keyFile.pub_key),
+        getBalance(keyFile.pub_key),
+        fetchDevices(keyFile.pub_key),
+      ]);
+      if (cancelled) return;
+      setIdentity(id);
+      setBalance(bal);
+      setDevices(devs);
+    })();
+    return () => { cancelled = true; };
+  }, [keyFile]);
+
+  if (!keyFile) return <></>;
+
+  const copy = (s: string) => navigator.clipboard.writeText(s).catch(() => {});
+
+  const viewMyPosts = () => {
+    setFeedTab({ kind: 'author', pub: keyFile.pub_key });
+    setSection('feed');
+  };
+  const openDevices = () => {
+    setSection('settings');
+    setPage('devices');
+  };
+
   return (
-    <SectionPlaceholder
+    <div style={{
-      title="Your profile"
+      height: '100%', overflowY: 'auto',
-      note="Balance, username, devices — coming soon."
+      padding: '22px 26px', background: '#000',
-      centered
+    }}>
-    />
+      <div style={{
+        display: 'flex', alignItems: 'flex-end', justifyContent: 'space-between',
+        gap: 12, flexWrap: 'wrap',
+      }}>
+        <div>
+          <div style={{
+            color: '#8b8b8b', fontSize: 11, letterSpacing: 1, textTransform: 'uppercase',
+          }}>Balance</div>
+          <div style={{ color: '#fff', fontSize: 34, fontWeight: 800 }}>
+            {balance === null ? '—' : `${formatT(balance)} T`}
+          </div>
+        </div>
+        <div style={{ display: 'flex', gap: 8, flexWrap: 'wrap' }}>
+          <Action onClick={viewMyPosts}>My posts</Action>
+          <Action onClick={openDevices}>Manage devices ({devices.length})</Action>
+          <Action onClick={() => copy(keyFile.pub_key)}>Copy address</Action>
+        </div>
+      </div>
+
+      {identity && (
+        <div style={{
+          marginTop: 24, padding: 14, borderRadius: 12,
+          background: '#0a0a0a', border: '1px solid #1f1f1f',
+        }}>
+          <Row k="DC address" v={identity.address} onCopy={() => copy(identity.address)} />
+          <Row k="Username"   v={identity.nickname ? `@${identity.nickname}` : '—'} />
+          <Row k="Published X25519" v={shortAddr(identity.x25519_pub, 10) || '—'} />
+          <Row k="Registered" v={identity.registered ? 'yes' : 'no'} />
+        </div>
+      )}
+
+      {/* Devices summary */}
+      <div style={{
+        marginTop: 14, padding: 14, borderRadius: 12,
+        background: '#0a0a0a', border: '1px solid #1f1f1f',
+      }}>
+        <div style={{
+          color: '#8b8b8b', fontSize: 11, fontWeight: 700,
+          letterSpacing: 1, textTransform: 'uppercase', marginBottom: 10,
+        }}>Linked devices</div>
+        {devices.length === 0 ? (
+          <div style={{ color: '#6a6a6a', fontSize: 13 }}>
+            No devices registered yet.
+          </div>
+        ) : (
+          devices.map((d, i) => (
+            <div
+              key={d.x25519_pub_key}
+              style={{
+                display: 'flex', alignItems: 'center', gap: 10,
+                padding: '8px 0',
+                borderTop: i === 0 ? undefined : '1px solid #141414',
+              }}
+            >
+              <div style={{
+                width: 28, height: 28, borderRadius: 6,
+                background: d.x25519_pub_key === keyFile.x25519_pub ? '#0d2540' : '#1a1a1a',
+                color: d.x25519_pub_key === keyFile.x25519_pub ? '#1d9bf0' : '#d0d0d0',
+                display: 'flex', alignItems: 'center', justifyContent: 'center',
+                fontSize: 14,
+              }}>📱</div>
+              <div style={{ flex: 1 }}>
+                <div style={{ color: '#fff', fontSize: 13, fontWeight: 600 }}>
+                  {d.device_name}
+                </div>
+                <div style={{ color: '#8b8b8b', fontSize: 11, fontFamily: 'monospace' }}>
+                  {shortAddr(d.x25519_pub_key, 8)}
+                </div>
+              </div>
+              {d.x25519_pub_key === keyFile.x25519_pub && (
+                <span style={{
+                  padding: '1px 6px', borderRadius: 6,
+                  background: '#0d2540', color: '#1d9bf0',
+                  fontSize: 10, fontWeight: 700,
+                }}>THIS DEVICE</span>
+              )}
+            </div>
+          ))
+        )}
+      </div>
+    </div>
+  );
+}
+
+function Action({ children, onClick }: {
+  children: React.ReactNode; onClick: () => void;
+}) {
+  return (
+    <button
+      onClick={onClick}
+      style={{
+        padding: '9px 14px', borderRadius: 999,
+        background: 'transparent', border: '1px solid #1f1f1f',
+        color: '#fff', fontSize: 13, fontWeight: 700, cursor: 'pointer',
+      }}
+    >{children}</button>
+  );
+}
+
+function Row({ k, v, onCopy }: { k: string; v: string; onCopy?: () => void }) {
+  return (
+    <div style={{
+      display: 'flex', padding: '6px 0',
+      borderBottom: '1px solid #141414',
+      alignItems: 'center', gap: 10,
+    }}>
+      <div style={{ color: '#8b8b8b', fontSize: 12, flex: '0 0 160px' }}>{k}</div>
+      <div className="selectable" style={{
+        color: '#fff', fontSize: 13, fontFamily: 'monospace',
+        flex: 1, wordBreak: 'break-all',
+      }}>{v}</div>
+      {onCopy && (
+        <button
+          onClick={onCopy}
+          style={{
+            background: 'transparent', border: 'none',
+            color: '#1d9bf0', fontSize: 11, fontWeight: 600, cursor: 'pointer',
+          }}
+        >copy</button>
+      )}
+    </div>
   );
 }

desktop/src/sections/settings/AboutPage.tsx

@@ -0,0 +1,59 @@
+// AboutPage — version info, platform, build links. Reads app.version
+// via the preload IPC bridge.
+
+import React, { useEffect, useState } from 'react';
+import { PageLayout } from './PageLayout';
+import { Card, Label, Hint } from './NodePage';
+
+export function AboutPage(): React.ReactElement {
+  const [version,  setVersion]  = useState('dev');
+  const [platform, setPlatform] = useState('');
+
+  useEffect(() => {
+    window.dchain?.app.version().then(setVersion).catch(() => {});
+    window.dchain?.app.platform().then(setPlatform).catch(() => {});
+  }, []);
+
+  return (
+    <PageLayout title="About">
+      <Card>
+        <Label>Build</Label>
+        <div style={{ color: '#fff', fontSize: 14, fontFamily: 'monospace' }}>
+          DChain Desktop v{version}
+        </div>
+        <Hint>
+          Running on {platform || 'unknown'} · Electron / Chromium
+        </Hint>
+      </Card>
+
+      <Card>
+        <Label>Links</Label>
+        <div style={{ display: 'flex', flexDirection: 'column', gap: 6 }}>
+          <LinkRow
+            href="https://git.vsecoder.vodka/vsecoder/dchain"
+            label="Source code (Gitea)"
+          />
+          <LinkRow
+            href="https://git.vsecoder.vodka/vsecoder/dchain/releases"
+            label="Releases"
+          />
+          <LinkRow
+            href="https://git.vsecoder.vodka/vsecoder/dchain/src/branch/main/docs"
+            label="Documentation"
+          />
+        </div>
+      </Card>
+    </PageLayout>
+  );
+}
+
+function LinkRow({ href, label }: { href: string; label: string }) {
+  return (
+    <a
+      href={href}
+      target="_blank"
+      rel="noreferrer"
+      style={{ color: '#1d9bf0', fontSize: 13, textDecoration: 'none' }}
+    >{label} ↗</a>
+  );
+}

desktop/src/sections/settings/DevicesPage.tsx

@@ -0,0 +1,353 @@
+// DevicesPage — multi-device registry UI.
+//
+// Top: list of on-chain devices for this identity. Each row has:
+//   * badge for "this device" (cannot be unlinked from here — you'd
+//     wipe yourself on next boot)
+//   * device name + truncated X25519 pub + added-at
+//   * Unlink button for others (submits UNLINK_DEVICE tx)
+//
+// Bottom: "Link new device" modal, same protocol as mobile's
+// Settings → Devices → Link new device.
+
+import React, { useCallback, useEffect, useState } from 'react';
+import { useStore } from '@/lib/store';
+import {
+  fetchDevices, type DeviceInfo,
+} from '@/lib/api';
+import { buildLinkDeviceTx, buildUnlinkDeviceTx, submitTx, humanizeTxError } from '@/lib/tx';
+import { sendEnvelope } from '@/lib/relay';
+import { encryptMessage, shortAddr } from '@/lib/crypto';
+import { PageLayout } from './PageLayout';
+import { Card, Label, Hint, inputStyle } from './NodePage';
+import { Button } from './IdentityPage';
+
+export function DevicesPage(): React.ReactElement {
+  const keyFile = useStore(s => s.keyFile);
+
+  const [devs, setDevs]           = useState<DeviceInfo[]>([]);
+  const [loading, setLoading]     = useState(true);
+  const [unlinking, setUnlinking] = useState<string | null>(null);
+  const [notice, setNotice]       = useState<string | null>(null);
+  const [linkOpen, setLinkOpen]   = useState(false);
+
+  const load = useCallback(async () => {
+    if (!keyFile) return;
+    setLoading(true);
+    try {
+      setDevs(await fetchDevices(keyFile.pub_key));
+    } finally {
+      setLoading(false);
+    }
+  }, [keyFile]);
+
+  useEffect(() => { load(); }, [load]);
+
+  const onUnlink = useCallback(async (d: DeviceInfo) => {
+    if (!keyFile) return;
+    if (!confirm(
+      `Unlink "${d.device_name}"? It will stop receiving messages sent to you. ` +
+      `The device itself will wipe its local state next time it checks in. ` +
+      `This costs a small network fee.`,
+    )) return;
+    setUnlinking(d.x25519_pub_key);
+    setNotice(null);
+    try {
+      const tx = buildUnlinkDeviceTx({
+        from:      keyFile.pub_key,
+        x25519Pub: d.x25519_pub_key,
+        privKey:   keyFile.priv_key,
+      });
+      await submitTx(tx);
+      setDevs(prev => prev.filter(x => x.x25519_pub_key !== d.x25519_pub_key));
+      setNotice(`Unlinked — registry will converge in a block or two.`);
+    } catch (e) {
+      setNotice(`Unlink failed: ${humanizeTxError(e)}`);
+    } finally {
+      setUnlinking(null);
+    }
+  }, [keyFile]);
+
+  const meX25519 = keyFile?.x25519_pub ?? '';
+
+  return (
+    <PageLayout
+      title="Devices"
+      subtitle="Every linked device gets its own encryption key; messages sent to you are delivered to all of them."
+    >
+      <Card>
+        <div style={{
+          display: 'flex', alignItems: 'center', justifyContent: 'space-between',
+          gap: 12,
+        }}>
+          <Label>Linked devices</Label>
+          <Button onClick={() => setLinkOpen(true)}>Link new device</Button>
+        </div>
+
+        {loading ? (
+          <div style={{ color: '#6a6a6a', fontSize: 13, padding: 12 }}>Loading…</div>
+        ) : devs.length === 0 ? (
+          <div style={{ color: '#6a6a6a', fontSize: 13, padding: 12 }}>
+            No devices registered yet. This device auto-links once a small
+            network fee is available in your balance — pull to refresh after
+            a first transfer if the list stays empty.
+          </div>
+        ) : (
+          <div style={{ marginTop: 4 }}>
+            {devs.map((d, i) => (
+              <DeviceRow
+                key={d.x25519_pub_key}
+                d={d}
+                isMe={d.x25519_pub_key === meX25519}
+                unlinking={unlinking === d.x25519_pub_key}
+                onUnlink={() => onUnlink(d)}
+                first={i === 0}
+              />
+            ))}
+          </div>
+        )}
+
+        {notice && (
+          <div style={{
+            marginTop: 10, padding: 10, borderRadius: 8,
+            background: notice.startsWith('Unlink failed')
+              ? '#2a1414' : '#0d2540',
+            color: notice.startsWith('Unlink failed') ? '#ff9b9b' : '#1d9bf0',
+            fontSize: 12,
+          }}>{notice}</div>
+        )}
+      </Card>
+
+      {linkOpen && (
+        <LinkNewDeviceModal
+          onClose={() => setLinkOpen(false)}
+          onLinked={() => { setLinkOpen(false); setTimeout(load, 1000); }}
+        />
+      )}
+    </PageLayout>
+  );
+}
+
+// ─── Row ─────────────────────────────────────────────────────────────────
+
+function DeviceRow({
+  d, isMe, unlinking, onUnlink, first,
+}: {
+  d: DeviceInfo; isMe: boolean; unlinking: boolean;
+  onUnlink: () => void; first: boolean;
+}) {
+  return (
+    <div style={{
+      display: 'flex', alignItems: 'center', gap: 12,
+      padding: '12px 0',
+      borderTop: first ? undefined : '1px solid #1f1f1f',
+    }}>
+      <div style={{
+        width: 32, height: 32, borderRadius: 8,
+        background: isMe ? '#0d2540' : '#1a1a1a',
+        color: isMe ? '#1d9bf0' : '#d0d0d0',
+        display: 'flex', alignItems: 'center', justifyContent: 'center',
+        fontSize: 16,
+      }}>📱</div>
+      <div style={{ flex: 1, minWidth: 0 }}>
+        <div style={{
+          display: 'flex', alignItems: 'center', gap: 6,
+        }}>
+          <span style={{ color: '#fff', fontSize: 14, fontWeight: 700 }}>
+            {d.device_name || 'Unnamed device'}
+          </span>
+          {isMe && (
+            <span style={{
+              padding: '1px 6px', borderRadius: 6,
+              background: '#0d2540', color: '#1d9bf0',
+              fontSize: 10, fontWeight: 700, letterSpacing: 0.5,
+            }}>THIS DEVICE</span>
+          )}
+        </div>
+        <div style={{
+          color: '#8b8b8b', fontSize: 11, fontFamily: 'monospace',
+          marginTop: 3,
+        }}>
+          {shortAddr(d.x25519_pub_key, 10)}
+        </div>
+        <div style={{ color: '#6a6a6a', fontSize: 11, marginTop: 2 }}>
+          Linked {new Date(d.added_at * 1000).toLocaleString()}
+        </div>
+      </div>
+      {!isMe && (
+        <button
+          onClick={onUnlink}
+          disabled={unlinking}
+          style={{
+            padding: '6px 12px', borderRadius: 999,
+            background: 'transparent', border: '1px solid #3a2020',
+            color: '#ff6b6b', fontSize: 11, fontWeight: 700,
+            cursor: unlinking ? 'default' : 'pointer',
+            opacity: unlinking ? 0.5 : 1,
+          }}
+        >{unlinking ? '…' : 'Unlink'}</button>
+      )}
+    </div>
+  );
+}
+
+// ─── Link New Device modal ───────────────────────────────────────────────
+
+function LinkNewDeviceModal({
+  onClose, onLinked,
+}: {
+  onClose: () => void;
+  onLinked: () => void;
+}): React.ReactElement {
+  const keyFile = useStore(s => s.keyFile);
+
+  const [code, setCode] = useState('');
+  const [key,  setKey]  = useState('');
+  const [name, setName] = useState('');
+  const [busy, setBusy] = useState(false);
+  const [err,  setErr]  = useState<string | null>(null);
+
+  const submit = async () => {
+    if (!keyFile) return;
+    const c = code.replace(/\s+/g, '').trim();
+    const k = key.replace(/\s+/g, '').trim().toLowerCase();
+    if (!/^\d{6}$/.test(c)) { setErr('Code must be 6 digits.'); return; }
+    if (!/^[0-9a-f]{64}$/.test(k)) { setErr('Device key must be 64 hex chars.'); return; }
+    const nm = name.trim() || 'New device';
+    setBusy(true); setErr(null);
+    try {
+      // 1. LINK_DEVICE tx → registry learns the new pub.
+      const linkTx = buildLinkDeviceTx({
+        from:       keyFile.pub_key,
+        x25519Pub:  k,
+        deviceName: nm,
+        privKey:    keyFile.priv_key,
+      });
+      await submitTx(linkTx);
+      // 2. Handshake envelope — encrypt master priv for the new device.
+      const payload = JSON.stringify({
+        v: 1,
+        type: 'pair-handshake',
+        code: c,
+        master_pub:        keyFile.pub_key,
+        master_priv:       keyFile.priv_key,
+        master_x25519_pub: keyFile.x25519_pub,
+      });
+      const { nonce, ciphertext } = encryptMessage(
+        payload, keyFile.x25519_priv, k,
+      );
+      await sendEnvelope({
+        senderPub:        keyFile.x25519_pub,
+        recipientPub:     k,
+        senderEd25519Pub: keyFile.pub_key,
+        nonce, ciphertext,
+      });
+      onLinked();
+    } catch (e) {
+      setErr(humanizeTxError(e));
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  return (
+    <div
+      onClick={() => !busy && onClose()}
+      style={{
+        position: 'fixed', inset: 0, zIndex: 20,
+        background: 'rgba(0,0,0,0.7)',
+        display: 'flex', alignItems: 'center', justifyContent: 'center',
+        padding: 24,
+      }}
+    >
+      <div
+        onClick={e => e.stopPropagation()}
+        style={{
+          width: '100%', maxWidth: 520, padding: 20, borderRadius: 16,
+          background: '#0a0a0a', border: '1px solid #1f1f1f',
+        }}
+      >
+        <div style={{
+          display: 'flex', alignItems: 'center', justifyContent: 'space-between',
+          marginBottom: 12,
+        }}>
+          <div style={{ color: '#fff', fontSize: 16, fontWeight: 700 }}>
+            Link new device
+          </div>
+          <button
+            onClick={onClose} disabled={busy}
+            style={{
+              background: 'transparent', border: 'none',
+              color: '#8b8b8b', fontSize: 20, cursor: 'pointer',
+            }}
+          >×</button>
+        </div>
+        <Hint>
+          On the new device, tap <b>Pair</b> on the welcome screen and
+          transcribe the 6-digit code and device key from there into the
+          fields below.
+        </Hint>
+
+        <div style={{ marginTop: 14, display: 'flex', flexDirection: 'column', gap: 12 }}>
+          <Field>
+            <Label>6-digit code</Label>
+            <input
+              value={code}
+              onChange={e => setCode(e.target.value)}
+              placeholder="000000"
+              inputMode="numeric"
+              maxLength={6}
+              style={{ ...inputStyle, letterSpacing: 4, textAlign: 'center' }}
+            />
+          </Field>
+          <Field>
+            <Label>Device key (64 hex)</Label>
+            <input
+              value={key}
+              onChange={e => setKey(e.target.value)}
+              placeholder="a1b2c3…"
+              spellCheck={false}
+              style={inputStyle}
+            />
+          </Field>
+          <Field>
+            <Label>Name (optional)</Label>
+            <input
+              value={name}
+              onChange={e => setName(e.target.value)}
+              placeholder="e.g. Alice's laptop"
+              maxLength={64}
+              style={{ ...inputStyle, fontFamily: 'inherit' }}
+            />
+          </Field>
+        </div>
+
+        {err && (
+          <div style={{
+            marginTop: 12, padding: 10, borderRadius: 8,
+            background: '#2a1414', color: '#ff9b9b', fontSize: 12,
+          }}>{err}</div>
+        )}
+
+        <div style={{
+          marginTop: 16, display: 'flex', justifyContent: 'flex-end', gap: 10,
+        }}>
+          <button
+            onClick={onClose}
+            disabled={busy}
+            style={{
+              padding: '9px 14px', borderRadius: 999,
+              background: 'transparent', border: '1px solid #1f1f1f',
+              color: '#8b8b8b', fontSize: 13, fontWeight: 700,
+              cursor: busy ? 'default' : 'pointer',
+            }}
+          >Cancel</button>
+          <Button onClick={submit} disabled={busy}>{busy ? '…' : 'Link'}</Button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+function Field({ children }: { children: React.ReactNode }) {
+  return <div>{children}</div>;
+}

desktop/src/sections/settings/IdentityPage.tsx

@@ -0,0 +1,159 @@
+// Identity settings — pub key, copy, export/import key file, delete account.
+
+import React, { useState } from 'react';
+import { useStore } from '@/lib/store';
+import { saveKeyFile, wipeAllLocalState } from '@/lib/storage';
+import type { KeyFile } from '@/lib/types';
+import { PageLayout } from './PageLayout';
+import { Card, Label, Hint } from './NodePage';
+
+export function IdentityPage(): React.ReactElement {
+  const keyFile    = useStore(s => s.keyFile);
+  const setKeyFile = useStore(s => s.setKeyFile);
+  const [notice, setNotice] = useState<string | null>(null);
+
+  if (!keyFile) return <PageLayout title="Identity"><div>No identity loaded.</div></PageLayout>;
+
+  const copy = async (s: string, label: string) => {
+    await navigator.clipboard.writeText(s);
+    setNotice(`${label} copied`);
+    setTimeout(() => setNotice(null), 1500);
+  };
+
+  const exportKey = async () => {
+    const target = await window.dchain.dialog.saveFile({
+      title: 'Export key file',
+      defaultPath: 'node.json',
+      filters: [{ name: 'JSON', extensions: ['json'] }],
+    });
+    if (!target) return;
+    try {
+      await window.dchain.fs.writeText(target, JSON.stringify(keyFile, null, 2));
+      setNotice('Key saved — keep it offline + backed up.');
+    } catch (e) {
+      setNotice(`Export failed: ${e}`);
+    }
+  };
+
+  const importKey = async () => {
+    const src = await window.dchain.dialog.openFile({
+      title: 'Import key file',
+      filters: [{ name: 'JSON', extensions: ['json'] }],
+      properties: ['openFile'],
+    });
+    if (!src) return;
+    try {
+      const raw = await window.dchain.fs.readText(src);
+      const parsed = JSON.parse(raw) as KeyFile;
+      if (!parsed.pub_key || !parsed.priv_key) throw new Error('not a key file');
+      if (!confirm('Replace the current identity with the imported one? The current identity will be wiped from this device.')) return;
+      await wipeAllLocalState();
+      await saveKeyFile(parsed);
+      setKeyFile(parsed);
+      setNotice('Imported — reload is not needed, new identity active.');
+    } catch (e) {
+      setNotice(`Import failed: ${e}`);
+    }
+  };
+
+  const deleteAccount = async () => {
+    if (!confirm('Delete this identity from this device? Keys are NOT recoverable from the server — export first if you want to keep them.')) return;
+    await wipeAllLocalState();
+    setKeyFile(null);
+  };
+
+  return (
+    <PageLayout title="Identity" subtitle="Your Ed25519 master key. Keep it safe — there is no password recovery.">
+      <Card>
+        <Label>Public key (Ed25519, hex)</Label>
+        <div className="selectable" style={{
+          color: '#fff', fontSize: 12, fontFamily: 'monospace',
+          wordBreak: 'break-all', lineHeight: 1.5,
+        }}>
+          {keyFile.pub_key}
+        </div>
+        <ActionRow>
+          <Button onClick={() => copy(keyFile.pub_key, 'Pub key')}>Copy</Button>
+        </ActionRow>
+      </Card>
+
+      <Card>
+        <Label>Device encryption key (X25519, hex)</Label>
+        <div className="selectable" style={{
+          color: '#fff', fontSize: 12, fontFamily: 'monospace',
+          wordBreak: 'break-all', lineHeight: 1.5,
+        }}>
+          {keyFile.x25519_pub}
+        </div>
+        <Hint>
+          Only this device uses this X25519 pair. Sharing the master Ed25519
+          pub (above) is how contacts find you across all your devices.
+        </Hint>
+      </Card>
+
+      <Card>
+        <Label>Backup</Label>
+        <ActionRow>
+          <Button onClick={exportKey}>Export key file</Button>
+          <Button onClick={importKey} danger>Import / replace</Button>
+        </ActionRow>
+        <Hint>
+          Exports a JSON file compatible with the mobile client and
+          server's <code>--key</code> flag. The file is <strong>not</strong>
+          encrypted on disk — store it somewhere safe.
+        </Hint>
+      </Card>
+
+      <Card>
+        <Label>Danger zone</Label>
+        <ActionRow>
+          <Button onClick={deleteAccount} danger>Delete this identity</Button>
+        </ActionRow>
+        <Hint>
+          Wipes the key, contacts, and chat cache from this device.
+          Without an export, this is irreversible.
+        </Hint>
+      </Card>
+
+      {notice && (
+        <div style={{
+          padding: 10, borderRadius: 8,
+          background: '#0d2540', color: '#1d9bf0', fontSize: 12,
+        }}>{notice}</div>
+      )}
+    </PageLayout>
+  );
+}
+
+function ActionRow({ children }: { children: React.ReactNode }) {
+  return (
+    <div style={{
+      display: 'flex', gap: 8, marginTop: 10, flexWrap: 'wrap',
+    }}>{children}</div>
+  );
+}
+
+export function Button({
+  children, onClick, danger, disabled,
+}: {
+  children: React.ReactNode;
+  onClick: () => void;
+  danger?: boolean;
+  disabled?: boolean;
+}) {
+  return (
+    <button
+      onClick={onClick}
+      disabled={disabled}
+      style={{
+        padding: '8px 14px', borderRadius: 999,
+        background: danger ? 'transparent' : '#1d9bf0',
+        border: danger ? '1px solid #3a2020' : 'none',
+        color: danger ? '#ff6b6b' : '#fff',
+        fontSize: 12, fontWeight: 700,
+        cursor: disabled ? 'default' : 'pointer',
+        opacity: disabled ? 0.5 : 1,
+      }}
+    >{children}</button>
+  );
+}

desktop/src/sections/settings/NodePage.tsx

@@ -0,0 +1,115 @@
+// Node settings page — URL, connection ping-on-commit, token field.
+
+import React, { useEffect, useState } from 'react';
+import { useStore } from '@/lib/store';
+import { getNetStats, setNodeUrl, setApiToken } from '@/lib/api';
+import { saveSettings } from '@/lib/storage';
+import { PageLayout } from './PageLayout';
+
+export function NodePage(): React.ReactElement {
+  const settings    = useStore(s => s.settings);
+  const setSettings = useStore(s => s.setSettings);
+
+  const [url,   setUrl]   = useState(settings.nodeUrl);
+  const [token, setToken] = useState(settings.apiToken ?? '');
+  const [ok,    setOk]    = useState<boolean | null>(null);
+  const [busy,  setBusy]  = useState(false);
+
+  useEffect(() => { setUrl(settings.nodeUrl); setToken(settings.apiToken ?? ''); },
+    [settings.nodeUrl, settings.apiToken]);
+
+  const apply = async () => {
+    const clean = url.trim().replace(/\/$/, '');
+    if (!clean) return;
+    setBusy(true); setOk(null);
+    setNodeUrl(clean);
+    setApiToken(token.trim() || null);
+    try {
+      await getNetStats();
+      setOk(true);
+      const next = { nodeUrl: clean, apiToken: token.trim() || undefined };
+      setSettings(next);
+      saveSettings(next);
+    } catch {
+      setOk(false);
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  const dot = ok === true ? '#3ba55d' : ok === false ? '#f4212e' : '#8b8b8b';
+
+  return (
+    <PageLayout title="Node" subtitle="Which DChain node this client talks to">
+      <Card>
+        <Label>Node URL</Label>
+        <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
+          <span style={{ width: 7, height: 7, borderRadius: 3.5, background: dot }} />
+          <input
+            value={url}
+            onChange={e => { setUrl(e.target.value); setOk(null); }}
+            onBlur={apply}
+            onKeyDown={e => { if (e.key === 'Enter') apply(); }}
+            placeholder="http://node.example:8080"
+            spellCheck={false}
+            style={inputStyle}
+          />
+          {busy && <span style={{ color: '#8b8b8b', fontSize: 11 }}>…</span>}
+        </div>
+        <Hint>
+          Enter or tab-out to ping. Green dot = `/api/netstats` replied.
+        </Hint>
+      </Card>
+
+      <Card>
+        <Label>API token (optional)</Label>
+        <input
+          type="password"
+          value={token}
+          onChange={e => setToken(e.target.value)}
+          onBlur={apply}
+          placeholder="paste Bearer token if node requires it"
+          spellCheck={false}
+          style={inputStyle}
+        />
+        <Hint>
+          Some nodes gate writes with DCHAIN_API_TOKEN; leave blank for
+          public ones.
+        </Hint>
+      </Card>
+    </PageLayout>
+  );
+}
+
+// ─── Reusable primitives (also imported by Identity / Devices / About) ───
+
+export function Card({ children }: { children: React.ReactNode }) {
+  return (
+    <div style={{
+      padding: 14, marginBottom: 14, borderRadius: 12,
+      background: '#0a0a0a', border: '1px solid #1f1f1f',
+    }}>{children}</div>
+  );
+}
+export function Label({ children }: { children: React.ReactNode }) {
+  return (
+    <div style={{
+      color: '#8b8b8b', fontSize: 11, fontWeight: 700,
+      letterSpacing: 1.2, textTransform: 'uppercase', marginBottom: 8,
+    }}>{children}</div>
+  );
+}
+export function Hint({ children }: { children: React.ReactNode }) {
+  return (
+    <div style={{ color: '#6a6a6a', fontSize: 11, marginTop: 6, lineHeight: 1.5 }}>
+      {children}
+    </div>
+  );
+}
+export const inputStyle: React.CSSProperties = {
+  flex: 1, boxSizing: 'border-box',
+  background: '#000', border: '1px solid #1f1f1f',
+  borderRadius: 8, padding: '10px 12px',
+  color: '#fff', fontSize: 13, fontFamily: 'monospace',
+  outline: 'none', width: '100%',
+};

desktop/src/sections/settings/PageLayout.tsx

@@ -0,0 +1,33 @@
+// Shared layout for Settings subsection pages — sticky header with the
+// page title + scroll body. Keeps spacing consistent across Node /
+// Identity / Devices / About.
+
+import React from 'react';
+
+export function PageLayout({
+  title, subtitle, children,
+}: {
+  title: string;
+  subtitle?: string;
+  children: React.ReactNode;
+}): React.ReactElement {
+  return (
+    <div style={{
+      height: '100%', overflowY: 'auto', background: '#000',
+    }}>
+      <div style={{
+        position: 'sticky', top: 0, zIndex: 1,
+        padding: '14px 22px', borderBottom: '1px solid #1f1f1f',
+        background: 'rgba(0,0,0,0.9)', backdropFilter: 'blur(6px)',
+      }}>
+        <div style={{ color: '#fff', fontSize: 16, fontWeight: 800 }}>{title}</div>
+        {subtitle && (
+          <div style={{ color: '#8b8b8b', fontSize: 12, marginTop: 2 }}>{subtitle}</div>
+        )}
+      </div>
+      <div style={{ padding: '18px 22px' }}>
+        {children}
+      </div>
+    </div>
+  );
+}

desktop/src/sections/settings/SettingsDetail.tsx

@@ -0,0 +1,18 @@
+// Right-pane content for Settings. Renders by store.settingsPage.
+
+import React from 'react';
+import { useStore } from '@/lib/store';
+import { NodePage } from './NodePage';
+import { IdentityPage } from './IdentityPage';
+import { DevicesPage } from './DevicesPage';
+import { AboutPage } from './AboutPage';
+
+export function SettingsDetail(): React.ReactElement {
+  const page = useStore(s => s.settingsPage);
+  switch (page) {
+    case 'node':     return <NodePage />;
+    case 'identity': return <IdentityPage />;
+    case 'devices':  return <DevicesPage />;
+    case 'about':    return <AboutPage />;
+  }
+}

desktop/src/sections/settings/SettingsNav.tsx

@@ -0,0 +1,61 @@
+// Left-pane category list for Settings. Keeps selection in
+// store.settingsPage so switching away and back preserves place.
+
+import React from 'react';
+import { useStore, type SettingsPage } from '@/lib/store';
+
+interface Row {
+  key:   SettingsPage;
+  label: string;
+  hint:  string;
+}
+
+const ROWS: Row[] = [
+  { key: 'node',     label: 'Node',     hint: 'URL, connection status'         },
+  { key: 'identity', label: 'Identity', hint: 'Your keys and address'          },
+  { key: 'devices',  label: 'Devices',  hint: 'Linked devices, pair a new one' },
+  { key: 'about',    label: 'About',    hint: 'Version, links'                 },
+];
+
+export function SettingsNav(): React.ReactElement {
+  const page    = useStore(s => s.settingsPage);
+  const setPage = useStore(s => s.setSettingsPage);
+  return (
+    <div style={{ padding: 10 }}>
+      {ROWS.map(r => (
+        <NavEntry
+          key={r.key}
+          label={r.label}
+          hint={r.hint}
+          active={page === r.key}
+          onClick={() => setPage(r.key)}
+        />
+      ))}
+    </div>
+  );
+}
+
+function NavEntry({
+  label, hint, active, onClick,
+}: { label: string; hint: string; active: boolean; onClick: () => void }) {
+  return (
+    <div
+      onClick={onClick}
+      style={{
+        padding: '10px 12px', borderRadius: 10, cursor: 'pointer',
+        background: active ? '#0a1a29' : 'transparent',
+        border: active ? '1px solid #1d9bf022' : '1px solid transparent',
+      }}
+      onMouseEnter={e => { if (!active) (e.currentTarget as HTMLDivElement).style.background = '#0a0a0a'; }}
+      onMouseLeave={e => { if (!active) (e.currentTarget as HTMLDivElement).style.background = 'transparent'; }}
+    >
+      <div style={{
+        color: active ? '#1d9bf0' : '#fff',
+        fontSize: 14, fontWeight: 700,
+      }}>{label}</div>
+      <div style={{ color: '#6a6a6a', fontSize: 11, marginTop: 2 }}>
+        {hint}
+      </div>
+    </div>
+  );
+}

desktop/src/sections/settings/index.tsx

@@ -1,133 +1,6 @@
-import React, { useEffect, useState } from 'react';
+// Settings section — two-pane.
-import { useStore } from '@/lib/store';
+//   List pane: category nav (Node, Identity, Devices, About).
-import { saveSettings } from '@/lib/storage';
+//   Detail pane: selected category's content.
-import { setNodeUrl, getNetStats } from '@/lib/api';
-import { SectionPlaceholder } from '@/shell/SectionPlaceholder';
 
-export function SettingsList(): React.ReactElement {
+export { SettingsNav as SettingsList } from './SettingsNav';
-  return (
+export { SettingsDetail } from './SettingsDetail';
-    <div style={{ padding: 14, display: 'flex', flexDirection: 'column', gap: 14 }}>
-      <GroupLabel>Node</GroupLabel>
-      <NodeCard />
-      <GroupLabel>Identity</GroupLabel>
-      <IdentityCard />
-      <GroupLabel>About</GroupLabel>
-      <AboutCard />
-    </div>
-  );
-}
-
-export function SettingsDetail(): React.ReactElement {
-  return (
-    <SectionPlaceholder
-      title="Settings"
-      note="Pick a setting from the list. Devices, notifications, privacy — coming soon."
-      centered
-    />
-  );
-}
-
-function GroupLabel({ children }: { children: React.ReactNode }) {
-  return (
-    <div style={{
-      color: '#5a5a5a', fontSize: 11, fontWeight: 700,
-      letterSpacing: 1.2, textTransform: 'uppercase',
-    }}>
-      {children}
-    </div>
-  );
-}
-
-function NodeCard(): React.ReactElement {
-  const settings    = useStore(s => s.settings);
-  const setSettings = useStore(s => s.setSettings);
-  const [url,  setUrl]  = useState(settings.nodeUrl);
-  const [ok,   setOk]   = useState<boolean | null>(null);
-  const [busy, setBusy] = useState(false);
-
-  useEffect(() => { setUrl(settings.nodeUrl); }, [settings.nodeUrl]);
-
-  const apply = async () => {
-    const clean = url.trim().replace(/\/$/, '');
-    if (!clean) return;
-    setBusy(true); setOk(null);
-    setNodeUrl(clean);
-    try {
-      await getNetStats();
-      setOk(true);
-      setSettings({ nodeUrl: clean });
-      saveSettings({ nodeUrl: clean });
-    } catch {
-      setOk(false);
-    } finally {
-      setBusy(false);
-    }
-  };
-
-  const dot = ok === true ? '#3ba55d' : ok === false ? '#f4212e' : '#8b8b8b';
-
-  return (
-    <div style={{
-      border: '1px solid #1f1f1f', borderRadius: 12, padding: 12,
-      background: '#0a0a0a', display: 'flex', flexDirection: 'column', gap: 8,
-    }}>
-      <label style={{ color: '#8b8b8b', fontSize: 11, fontWeight: 700, letterSpacing: 1 }}>
-        NODE URL
-      </label>
-      <div style={{ display: 'flex', gap: 6, alignItems: 'center' }}>
-        <span style={{ width: 7, height: 7, borderRadius: 3.5, background: dot }} />
-        <input
-          value={url}
-          onChange={e => { setUrl(e.target.value); setOk(null); }}
-          onBlur={apply}
-          onKeyDown={e => { if (e.key === 'Enter') apply(); }}
-          placeholder="http://node.example:8080"
-          spellCheck={false}
-          style={{
-            flex: 1, background: '#000',
-            border: '1px solid #1f1f1f', borderRadius: 8,
-            padding: '8px 10px', color: '#fff', fontSize: 13,
-            fontFamily: 'monospace',
-          }}
-        />
-        {busy && <span style={{ fontSize: 11, color: '#8b8b8b' }}>…</span>}
-      </div>
-    </div>
-  );
-}
-
-function IdentityCard(): React.ReactElement {
-  const keyFile = useStore(s => s.keyFile);
-  if (!keyFile) return <></>;
-  return (
-    <div style={{
-      border: '1px solid #1f1f1f', borderRadius: 12, padding: 12,
-      background: '#0a0a0a',
-    }}>
-      <div style={{ color: '#8b8b8b', fontSize: 11, fontWeight: 700, letterSpacing: 1 }}>
-        PUB KEY
-      </div>
-      <div className="selectable" style={{
-        color: '#fff', fontSize: 11, fontFamily: 'monospace',
-        marginTop: 4, wordBreak: 'break-all', lineHeight: 1.5,
-      }}>
-        {keyFile.pub_key}
-      </div>
-    </div>
-  );
-}
-
-function AboutCard(): React.ReactElement {
-  const [v, setV] = useState<string>('dev');
-  useEffect(() => {
-    window.dchain?.app.version().then(setV).catch(() => {});
-  }, []);
-  return (
-    <div style={{
-      border: '1px solid #1f1f1f', borderRadius: 12, padding: 12,
-      background: '#0a0a0a', color: '#8b8b8b', fontSize: 12,
-    }}>
-      DChain Desktop v{v}
-    </div>
-  );
-}

desktop/src/sections/wallet/ReceiveModal.tsx

@@ -1,13 +1,28 @@
 // ReceiveModal — shows this wallet's pub key + a copy button. QR-code
 // polish goes in rc1 (needs a deps pull for qrcode-svg or similar).
 
-import React from 'react';
+import React, { useEffect, useRef, useState } from 'react';
+import QRCode from 'qrcode';
 import { useStore } from '@/lib/store';
 import { Backdrop, Header, primaryBtnStyle } from './SendModal';
 
 export function ReceiveModal({ onClose }: { onClose: () => void }): React.ReactElement {
   const keyFile = useStore(s => s.keyFile);
-  const [copied, setCopied] = React.useState(false);
+  const [copied, setCopied] = useState(false);
+  const canvasRef = useRef<HTMLCanvasElement>(null);
+
+  // Paint the QR on mount. Skip if there's no key (shouldn't happen but
+  // component is safe against it).
+  useEffect(() => {
+    if (!keyFile || !canvasRef.current) return;
+    QRCode.toCanvas(canvasRef.current, keyFile.pub_key, {
+      width: 196,
+      margin: 1,
+      color: { dark: '#ffffff', light: '#00000000' },
+      errorCorrectionLevel: 'M',
+    }).catch(() => { /* fall back to text only */ });
+  }, [keyFile]);
+
   if (!keyFile) return <></>;
 
   const copy = async () => {
@@ -29,8 +44,16 @@ export function ReceiveModal({ onClose }: { onClose: () => void }): React.ReactE
           a contact using this address.
         </div>
 
+        <div style={{
+          marginTop: 14, display: 'flex', justifyContent: 'center',
+          padding: 16, borderRadius: 10,
+          background: '#000', border: '1px solid #1f1f1f',
+        }}>
+          <canvas ref={canvasRef} style={{ imageRendering: 'pixelated' }} />
+        </div>
+
         <div className="selectable" style={{
-          marginTop: 14, padding: 14, borderRadius: 10,
+          marginTop: 10, padding: 14, borderRadius: 10,
           background: '#000', border: '1px solid #1f1f1f',
           color: '#fff', fontFamily: 'monospace', fontSize: 12,
           wordBreak: 'break-all', lineHeight: 1.5,

desktop/src/shell/Shell.tsx

@@ -19,6 +19,7 @@
 
 import React from 'react';
 import { useStore, type Section } from '@/lib/store';
+import { useGlobalKeybinds } from '@/hooks/useGlobalKeybinds';
 import { TitleBar } from './TitleBar';
 import { NavBar } from './NavBar';
 import { StatusBar } from './StatusBar';
@@ -32,6 +33,7 @@ import { ProfileList, ProfileDetail } from '@/sections/profile';
 export function Shell(): React.ReactElement {
   const section = useStore(s => s.section);
   const { List, Detail } = PANES[section];
+  useGlobalKeybinds();
   return (
     <div style={{
       display: 'flex', flexDirection: 'column',

docs/ROADMAP.md

@@ -188,20 +188,20 @@ desktop/
 
 ### План работ
 
-- [x] **v2.2.0-alpha4** — Boilerplate: Electron + Vite + React + TS,
+- [x] **v2.2.0-alpha4** — Boilerplate, 3-panel shell, safeStorage IPC,
-      frame-less window, 3-panel shell, nav + status bar, safeStorage
+      Welcome / Create / Import auth, section stubs.
-      for keyfile via IPC, Welcome + Create/Import auth flow, section
+- [x] **v2.2.0-alpha5** — Messages section + pairing poll loop; chain
-      stubs that the rest of the alphas will fill in.
+      + clients learn to attribute conversations by master Ed25519.
-- [ ] **v2.2.0-alpha5** — Messages section (chat list + conversation)
+- [x] **v2.2.0-alpha6** — Feed (tabs + list + detail + compose) +
-      using the same fan-out semantics as mobile. Pairing flow wired up
+      Wallet (history + detail + Send/Receive).
-      (new-device poll loop + primary-device modal reused from mobile).
+- [x] **v2.2.0-rc1** — Contacts section (list + profile detail + actions),
-- [ ] **v2.2.0-alpha6** — Feed + Wallet real content (reuse feed.ts /
+      Settings → Devices (list + unlink + link-new-device modal with the
-      tx builders from client-app via a shared workspace package).
+      same protocol as mobile), expanded Profile, QR in Receive, global
-- [ ] **v2.2.0-rc1** — Contacts + Settings → Devices + Profile,
+      keybinds (Ctrl+W close chat / Ctrl+K jump to Contacts / Ctrl+, Settings).
-      polish pass (keybinds, focus, drag-drop attachments).
 - [ ] **v2.2.0** — Auto-update through the same `/api/update-check`
       pipeline nodes use; `electron-builder` → `.dmg`, `.exe`,
-      `.AppImage`, `.deb`.
+      `.AppImage`, `.deb`; optional: attachments in Compose
+      (file picker + client-side image resize + scrub).
 
 ### Открытые вопросы (desktop)