feat(channels): share line and zalo binary attachments via minio

docs/plans/state.json

@@ -3695,6 +3695,23 @@
         "docs/plans/state.json"
       ],
       "test_status": "pnpm test:run src/backends/external.test.ts + pnpm typecheck passing"
+    },
+    "line-zalo-minio-binary-sharing": {
+      "status": "completed",
+      "date": "2026-02-17",
+      "updated": "2026-02-17",
+      "summary": "Implemented MinIO-backed binary attachment sharing for LINE and Zalo channels: when `backup.minio` is enabled, binary payloads are uploaded via `mc` and returned as share URLs to recipients; if unavailable, adapters keep explicit in-chat fallback notices.",
+      "files_modified": [
+        "src/channels/line/adapter.ts",
+        "src/channels/line/adapter.test.ts",
+        "src/channels/zalo/adapter.ts",
+        "src/channels/zalo/adapter.test.ts",
+        "src/daemon/channels.ts",
+        "README.md",
+        "config/default.yaml",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/channels/line/adapter.test.ts src/channels/zalo/adapter.test.ts src/daemon/channels.test.ts + pnpm typecheck passing"
     }
   },
   "overall_progress": {