feat: floor plan map, LQI edge coloring, zigbee path highlighting, eslint/test fixes, vite audit fix

frontend/package-lock.json

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-      "integrity": "sha512-5cIATbk5vynAjqqmyBjlciMJl1+R/CwX9oLk/EyiFXDWd95KpHdrOJT//rnUl4cUcskrd0jCCw3wpZnhIHdD9w==",
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       ],
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-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
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@@ -2734,9 +2748,9 @@
       ]
     },
     "node_modules/@rollup/rollup-openbsd-x64": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-openbsd-x64/-/rollup-openbsd-x64-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-openbsd-x64/-/rollup-openbsd-x64-4.62.0.tgz",
-      "integrity": "sha512-cl0w09WsCi17mcmWqqglez9Gk8isgeWvoUZ3WiJFYSR3zjBQc2J5/ihSjpl+VLjPqjQ/1hJRcqBfLjssREQILw==",
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       "cpu": [
         "x64"
       ],
@@ -2748,9 +2762,9 @@
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     },
     "node_modules/@rollup/rollup-openharmony-arm64": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-openharmony-arm64/-/rollup-openharmony-arm64-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-openharmony-arm64/-/rollup-openharmony-arm64-4.62.0.tgz",
-      "integrity": "sha512-4Cv23ZrONRbNtbZa37mLSueXUCtN7MXccChtKpUnQNgF010rjrjfHx3QxkS2PI7LqGT5xXyYs1a7LbzAwT0iCA==",
+      "integrity": "sha512-yTB9TgfWj5wHe5QgktAgXTLLot1gvEjl1NiPPAUiCs4oPrIWFl5V4nC3GrkNdj9LaAU4s94nVrGbGOCqUpyWsg==",
       "cpu": [
         "arm64"
       ],
@@ -2762,9 +2776,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-arm64-msvc": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-arm64-msvc/-/rollup-win32-arm64-msvc-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-arm64-msvc/-/rollup-win32-arm64-msvc-4.62.0.tgz",
-      "integrity": "sha512-i1okWYkA4FJICtr7KpYzFpRTHgy5jdDbZiWfvny21iIKky5YExiDXP+zbXzm3dUcFpkEeYNHgQ5fuG236JPq0g==",
+      "integrity": "sha512-5LOhoaesY3doG1c+ac/2JtgREpKoJr5bUHH8tKY0V8di7+uSV6BwLs2PlR0/yzefGOkR+wE7ZolZphHCsyG5Rw==",
       "cpu": [
         "arm64"
       ],
@@ -2776,9 +2790,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-ia32-msvc": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-ia32-msvc/-/rollup-win32-ia32-msvc-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-ia32-msvc/-/rollup-win32-ia32-msvc-4.62.0.tgz",
-      "integrity": "sha512-u09m3CuwLzShA0EYKMNiFgcjjzwqtUMLmuCJLeZWjjOYA3IT2Di09KaxGBTP9xVztWyIWjVdsB2E9goMjZvTQg==",
+      "integrity": "sha512-yYkWHhmbhRTWTnWos5HC4GcPQfjlzzCNbM9e/+GXrLuaBXYA3qSDR9f0Vgufd5S8yX81U8jPKp7ZnAjZFMtRnw==",
       "cpu": [
         "ia32"
       ],
@@ -2790,9 +2804,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-x64-gnu": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-gnu/-/rollup-win32-x64-gnu-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-gnu/-/rollup-win32-x64-gnu-4.62.0.tgz",
-      "integrity": "sha512-k+600V9Zl1CM7eZxJgMyTUzmrmhB/0XZnF4pRypKAlAgxmedUA+1v9R+XOFv56W4SlHEzfeMtzujLJD22Uz5zg==",
+      "integrity": "sha512-SoTb6lPg25xZlA2ibwQ++ahCCnH+FP0qmEuafMJ4gznZKOlXioKEAeJLgCrqjM98ACziXM9V1amFjICVL4IFoA==",
       "cpu": [
         "x64"
       ],
@@ -2804,9 +2818,9 @@
       ]
     },
     "node_modules/@rollup/rollup-win32-x64-msvc": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-msvc/-/rollup-win32-x64-msvc-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-win32-x64-msvc/-/rollup-win32-x64-msvc-4.62.0.tgz",
-      "integrity": "sha512-lWMnixq/QzxyhTV6NjQJ4SFo1J6PvOX8vUx5Wb4bBPsEb+8xZ89Bz6kOXpfXj9ak9AHTQVQzlgzBEc1SyM27xQ==",
+      "integrity": "sha512-5L+T1fMX4RIEBoZzT0+sQ0PhTS36NULFmMXtl1TZo44TMAROIMHbZufSOjVWt/Y622BtxgxtaNOokbTDvfsrZA==",
       "cpu": [
         "x64"
       ],
@@ -2858,6 +2872,13 @@
         "tailwindcss": "4.2.2"
       }
     },
+    "node_modules/@tailwindcss/node/node_modules/tailwindcss": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.2.2.tgz",
+      "integrity": "sha512-KWBIxs1Xb6NoLdMVqhbhgwZf2PGBpPEiwOqgI4pFIYbNTfBXiKYyWoTsXgBQ9WFg/OlhnvHaY+AEpW7wSmFo2Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@tailwindcss/oxide": {
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/@tailwindcss/oxide/-/oxide-4.2.2.tgz",
@@ -2975,9 +2996,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2995,9 +3013,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -3015,9 +3030,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -3035,9 +3047,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -3126,6 +3135,13 @@
         "vite": "^5.2.0 || ^6 || ^7 || ^8"
       }
     },
+    "node_modules/@tailwindcss/vite/node_modules/tailwindcss": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.2.2.tgz",
+      "integrity": "sha512-KWBIxs1Xb6NoLdMVqhbhgwZf2PGBpPEiwOqgI4pFIYbNTfBXiKYyWoTsXgBQ9WFg/OlhnvHaY+AEpW7wSmFo2Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@testing-library/dom": {
       "version": "10.4.1",
       "resolved": "https://registry.npmjs.org/@testing-library/dom/-/dom-10.4.1.tgz",
@@ -3263,6 +3279,17 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/@tybys/wasm-util": {
+      "version": "0.10.2",
+      "resolved": "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.2.tgz",
+      "integrity": "sha512-RoBvJ2X0wuKlWFIjrwffGw1IqZHKQqzIchKaadZZfnNpsAYp2mM0h36JtPCjNDAHGgYez/15uMBpfGwchhiMgg==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@types/aria-query": {
       "version": "5.0.4",
       "resolved": "https://registry.npmjs.org/@types/aria-query/-/aria-query-5.0.4.tgz",
@@ -3391,9 +3418,9 @@
       "license": "MIT"
     },
     "node_modules/@types/estree": {
-      "version": "1.0.8",
+      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
+      "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",
-      "integrity": "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w==",
+      "integrity": "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg==",
       "dev": true,
       "license": "MIT"
     },
@@ -6945,9 +6972,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -6969,9 +6993,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -6993,9 +7014,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -7017,9 +7035,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -7455,9 +7470,9 @@
       }
     },
     "node_modules/nanoid": {
-      "version": "3.3.11",
+      "version": "3.3.12",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.11.tgz",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.12.tgz",
-      "integrity": "sha512-N8SpfPUnUp1bK+PMYW8qSWdl9U+wwNWI4QKxOYDy9JAro3WMX7p2OeVRF9v+347pnakNevPmiHhNmZ2HbFA76w==",
+      "integrity": "sha512-ZB9RH/39qpq5Vu6Y+NmUaFhQR6pp+M2Xt76XBnEwDaGcVAqhlvxrl3B2bKS5D3NH3QR76v3aSrKaF/Kiy7lEtQ==",
       "funding": [
         {
           "type": "github",
@@ -7888,9 +7903,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.14",
+      "version": "8.5.15",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.14.tgz",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.15.tgz",
-      "integrity": "sha512-SoSL4+OSEtR99LHFZQiJLkT59C5B1amGO1NzTwj7TT1qCUgUO6hxOvzkOYxD+vMrXBM3XJIKzokoERdqQq/Zmg==",
+      "integrity": "sha512-FfR8sjd4em2T6fb3I2MwAJU7HWVMr9zba+enmQeeWFfCbm+UOC/0X4DS8XtpUTMwWMGbjKYP7xjfNekzyGmB3A==",
       "funding": [
         {
           "type": "opencollective",
@@ -7907,7 +7922,7 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "nanoid": "^3.3.11",
+        "nanoid": "^3.3.12",
         "picocolors": "^1.1.1",
         "source-map-js": "^1.2.1"
       },
@@ -8243,13 +8258,13 @@
       }
     },
     "node_modules/rollup": {
-      "version": "4.60.1",
+      "version": "4.62.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.60.1.tgz",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.62.0.tgz",
-      "integrity": "sha512-VmtB2rFU/GroZ4oL8+ZqXgSA38O6GR8KSIvWmEFv63pQ0G6KaBH9s07PO8XTXP4vI+3UJUEypOfjkGfmSBBR0w==",
+      "integrity": "sha512-nc72Wgq62I7rtDV4izT5/aaS0zxy3kttkinf9586ApknY3jZO9NYsmtc24fUckA0X7Q2v+ML4a15pdUlV5V/jA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@types/estree": "1.0.8"
+        "@types/estree": "1.0.9"
       },
       "bin": {
         "rollup": "dist/bin/rollup"
@@ -8259,31 +8274,31 @@
         "npm": ">=8.0.0"
       },
       "optionalDependencies": {
-        "@rollup/rollup-android-arm-eabi": "4.60.1",
+        "@rollup/rollup-android-arm-eabi": "4.62.0",
-        "@rollup/rollup-android-arm64": "4.60.1",
+        "@rollup/rollup-android-arm64": "4.62.0",
-        "@rollup/rollup-darwin-arm64": "4.60.1",
+        "@rollup/rollup-darwin-arm64": "4.62.0",
-        "@rollup/rollup-darwin-x64": "4.60.1",
+        "@rollup/rollup-darwin-x64": "4.62.0",
-        "@rollup/rollup-freebsd-arm64": "4.60.1",
+        "@rollup/rollup-freebsd-arm64": "4.62.0",
-        "@rollup/rollup-freebsd-x64": "4.60.1",
+        "@rollup/rollup-freebsd-x64": "4.62.0",
-        "@rollup/rollup-linux-arm-gnueabihf": "4.60.1",
+        "@rollup/rollup-linux-arm-gnueabihf": "4.62.0",
-        "@rollup/rollup-linux-arm-musleabihf": "4.60.1",
+        "@rollup/rollup-linux-arm-musleabihf": "4.62.0",
-        "@rollup/rollup-linux-arm64-gnu": "4.60.1",
+        "@rollup/rollup-linux-arm64-gnu": "4.62.0",
-        "@rollup/rollup-linux-arm64-musl": "4.60.1",
+        "@rollup/rollup-linux-arm64-musl": "4.62.0",
-        "@rollup/rollup-linux-loong64-gnu": "4.60.1",
+        "@rollup/rollup-linux-loong64-gnu": "4.62.0",
-        "@rollup/rollup-linux-loong64-musl": "4.60.1",
+        "@rollup/rollup-linux-loong64-musl": "4.62.0",
-        "@rollup/rollup-linux-ppc64-gnu": "4.60.1",
+        "@rollup/rollup-linux-ppc64-gnu": "4.62.0",
-        "@rollup/rollup-linux-ppc64-musl": "4.60.1",
+        "@rollup/rollup-linux-ppc64-musl": "4.62.0",
-        "@rollup/rollup-linux-riscv64-gnu": "4.60.1",
+        "@rollup/rollup-linux-riscv64-gnu": "4.62.0",
-        "@rollup/rollup-linux-riscv64-musl": "4.60.1",
+        "@rollup/rollup-linux-riscv64-musl": "4.62.0",
-        "@rollup/rollup-linux-s390x-gnu": "4.60.1",
+        "@rollup/rollup-linux-s390x-gnu": "4.62.0",
-        "@rollup/rollup-linux-x64-gnu": "4.60.1",
+        "@rollup/rollup-linux-x64-gnu": "4.62.0",
-        "@rollup/rollup-linux-x64-musl": "4.60.1",
+        "@rollup/rollup-linux-x64-musl": "4.62.0",
-        "@rollup/rollup-openbsd-x64": "4.60.1",
+        "@rollup/rollup-openbsd-x64": "4.62.0",
-        "@rollup/rollup-openharmony-arm64": "4.60.1",
+        "@rollup/rollup-openharmony-arm64": "4.62.0",
-        "@rollup/rollup-win32-arm64-msvc": "4.60.1",
+        "@rollup/rollup-win32-arm64-msvc": "4.62.0",
-        "@rollup/rollup-win32-ia32-msvc": "4.60.1",
+        "@rollup/rollup-win32-ia32-msvc": "4.62.0",
-        "@rollup/rollup-win32-x64-gnu": "4.60.1",
+        "@rollup/rollup-win32-x64-gnu": "4.62.0",
-        "@rollup/rollup-win32-x64-msvc": "4.60.1",
+        "@rollup/rollup-win32-x64-msvc": "4.62.0",
         "fsevents": "~2.3.2"
       }
     },
@@ -8856,9 +8871,9 @@
       }
     },
     "node_modules/tailwindcss": {
-      "version": "4.2.2",
+      "version": "4.3.1",
-      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.2.2.tgz",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.3.1.tgz",
-      "integrity": "sha512-KWBIxs1Xb6NoLdMVqhbhgwZf2PGBpPEiwOqgI4pFIYbNTfBXiKYyWoTsXgBQ9WFg/OlhnvHaY+AEpW7wSmFo2Q==",
+      "integrity": "sha512-hk+TB1m+K8CYNrP6rjQaq/Y+4Zylwpa87mLYBKCunwnnQ9p+fHb7kmSfGqyEJoxF/O6CDyABWVFEafNSYKll+Q==",
       "dev": true,
       "license": "MIT"
     },
@@ -8900,14 +8915,14 @@
       }
     },
     "node_modules/tinyglobby": {
-      "version": "0.2.15",
+      "version": "0.2.17",
-      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
+      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.17.tgz",
-      "integrity": "sha512-j2Zq4NyQYG5XMST4cbs02Ak8iJUdxRM0XI5QyxXuZOzKOINmWurp3smXu3y5wDcJrptwpSjgXHzIQxR0omXljQ==",
+      "integrity": "sha512-wXR/dYpcqKmfWpEdZjiKJOwCNFndD0DMnrW/cYjVGttEkBfVgcLFHoNrlj47mjOVic9yyNu65alsgF4NQyTa2g==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "fdir": "^6.5.0",
-        "picomatch": "^4.0.3"
+        "picomatch": "^4.0.4"
       },
       "engines": {
         "node": ">=12.0.0"

frontend/src/App.tsx

@@ -26,6 +26,7 @@ import { SettingsModal } from '@/components/modals/SettingsModal'
 import { ZigbeeImportModal } from '@/components/zigbee/ZigbeeImportModal'
 import { ZwaveImportModal } from '@/components/zwave/ZwaveImportModal'
 import { GroupRectModal, type GroupRectFormData } from '@/components/modals/GroupRectModal'
+import { FloorMapModal } from '@/components/modals/FloorMapModal'
 import { TextModal, type TextFormData } from '@/components/modals/TextModal'
 import { ThemeModal } from '@/components/modals/ThemeModal'
 import { SearchModal } from '@/components/modals/SearchModal'
@@ -41,14 +42,14 @@ import { canvasApi, designsApi, liveviewApi } from '@/api/client'
 import * as standaloneStorage from '@/utils/standaloneStorage'
 import { demoNodes, demoEdges } from '@/utils/demoData'
 import { useStatusPolling } from '@/hooks/useStatusPolling'
-import type { NodeData, EdgeData, CustomStyleDef } from '@/types'
+import type { NodeData, EdgeData, CustomStyleDef, FloorMapConfig } from '@/types'
 import type { ZigbeeNode, ZigbeeEdge } from '@/components/zigbee/types'
 import type { ZwaveNode, ZwaveEdge } from '@/components/zwave/types'
 
 const STANDALONE = import.meta.env.VITE_STANDALONE === 'true'
 
 export default function App() {
-  const { loadCanvas, markSaved, markUnsaved, selectedNodeId, selectedNodeIds, addNode, updateNode, deleteNode, onConnect, updateEdge, deleteEdge, setProxmoxContainerMode, setNodeZIndex, editingGroupRectId, setEditingGroupRectId, editingTextId, setEditingTextId, nodes, edges, snapshotHistory, undo, redo, addToGroup, addToContainer } = useCanvasStore()
+  const { loadCanvas, markSaved, markUnsaved, selectedNodeId, selectedNodeIds, addNode, updateNode, deleteNode, onConnect, updateEdge, deleteEdge, setProxmoxContainerMode, setNodeZIndex, editingGroupRectId, setEditingGroupRectId, editingTextId, setEditingTextId, nodes, edges, snapshotHistory, undo, redo, addToGroup, addToContainer, floorMap, setFloorMap } = useCanvasStore()
   const canvasRef = useRef<HTMLDivElement>(null)
   const { isAuthenticated } = useAuthStore()
   const { activeTheme, setTheme, customStyle, setCustomStyle } = useThemeStore()
@@ -82,6 +83,7 @@ export default function App() {
   const [exportModalOpen, setExportModalOpen] = useState(false)
   const [zigbeeImportOpen, setZigbeeImportOpen] = useState(false)
   const [zwaveImportOpen, setZwaveImportOpen] = useState(false)
+  const [floorMapModalOpen, setFloorMapModalOpen] = useState(false)
 
   // Declare handleSave before the Ctrl+S effect so it is in scope.
   // Returns true on success, false on failure — the design-switch effect relies
@@ -91,14 +93,16 @@ export default function App() {
       const saveDesignId = designIdOverride ?? activeDesignId
       if (STANDALONE) {
         if (!saveDesignId) return false
-        standaloneStorage.saveCanvas(saveDesignId, { nodes, edges, theme_id: activeTheme, custom_style: customStyle })
+        standaloneStorage.saveCanvas(saveDesignId, { nodes, edges, theme_id: activeTheme, custom_style: customStyle, floorMap })
         markSaved()
         toast.success('Canvas saved')
         return true
       }
       const nodesToSave = nodes.map(serializeNode)
       const edgesToSave = edges.map(serializeEdge)
-      await canvasApi.save({ nodes: nodesToSave, edges: edgesToSave, viewport: { theme_id: activeTheme }, custom_style: customStyle, design_id: saveDesignId })
+      const viewport: Record<string, unknown> = { theme_id: activeTheme }
+      if (floorMap) viewport.floor_map = floorMap
+      await canvasApi.save({ nodes: nodesToSave, edges: edgesToSave, viewport, custom_style: customStyle, design_id: saveDesignId })
       markSaved()
       toast.success('Canvas saved')
       return true
@@ -106,7 +110,7 @@ export default function App() {
       toast.error('Save failed')
       return false
     }
-  }, [nodes, edges, markSaved, activeTheme, customStyle, activeDesignId])
+  }, [nodes, edges, markSaved, activeTheme, customStyle, activeDesignId, floorMap])
 
   // Keep a ref so the keydown handler always calls the latest version
   const handleSaveRef = useRef(handleSave)
@@ -127,6 +131,8 @@ export default function App() {
         const savedTheme = res.data.viewport?.theme_id
         if (savedTheme) setTheme(savedTheme)
         if (res.data.custom_style) setCustomStyle(res.data.custom_style as CustomStyleDef)
+        const savedFloorMap = res.data.viewport?.floor_map as FloorMapConfig | undefined
+        if (savedFloorMap) setFloorMap(savedFloorMap)
         loadCanvas(rfNodes, rfEdges)
       } else {
         loadCanvas(demoNodes, demoEdges)
@@ -134,7 +140,7 @@ export default function App() {
     } catch {
       loadCanvas(demoNodes, demoEdges)
     }
-  }, [loadCanvas, setTheme, setCustomStyle])
+  }, [loadCanvas, setTheme, setCustomStyle, setFloorMap])
 
   // Standalone counterpart of loadCanvasFromApi — reads a design's canvas from
   // localStorage, falling back to the demo canvas when it has never been saved.
@@ -143,11 +149,12 @@ export default function App() {
     if (saved && saved.nodes.length > 0) {
       if (saved.theme_id) setTheme(saved.theme_id)
       if (saved.custom_style) setCustomStyle(saved.custom_style)
+      if (saved.floorMap) setFloorMap(saved.floorMap)
       loadCanvas(saved.nodes, saved.edges)
     } else {
       loadCanvas(demoNodes, demoEdges)
     }
-  }, [loadCanvas, setTheme, setCustomStyle])
+  }, [loadCanvas, setTheme, setCustomStyle, setFloorMap])
 
   const loadDesignsAndCanvas = useCallback(async () => {
     if (STANDALONE) {
@@ -518,6 +525,25 @@ export default function App() {
     }
   }, [activeDesignId])
 
+  const handleFloorMapSubmit = useCallback((config: FloorMapConfig) => {
+    snapshotHistory()
+    if (floorMap) {
+      // Preserve position from existing config when editing
+      setFloorMap({ ...floorMap, ...config })
+    } else {
+      setFloorMap(config)
+    }
+    setFloorMapModalOpen(false)
+    toast.success(floorMap ? 'Floor plan updated' : 'Floor plan imported')
+  }, [floorMap, setFloorMap, snapshotHistory])
+
+  const handleFloorMapRemove = useCallback(() => {
+    snapshotHistory()
+    setFloorMap(null)
+    setFloorMapModalOpen(false)
+    toast.success('Floor plan removed')
+  }, [setFloorMap, snapshotHistory])
+
   const handleExport = useCallback(() => {
     const el = canvasRef.current?.querySelector<HTMLElement>('.react-flow')
     if (!el) { toast.error('Canvas not ready'); return }
@@ -697,6 +723,7 @@ export default function App() {
             onScan={() => setScanConfigOpen(true)}
             onZigbeeImport={() => setZigbeeImportOpen(true)}
             onZwaveImport={() => setZwaveImportOpen(true)}
+            onFloorMap={() => setFloorMapModalOpen(true)}
             onSave={handleSave}
             onOpenSettings={() => setSettingsOpen(true)}
             onOpenHistory={() => setScanHistoryOpen(true)}
@@ -833,6 +860,15 @@ export default function App() {
           />
         )}
 
+        <FloorMapModal
+          key={floorMapModalOpen ? 'floor-map-open' : 'floor-map-closed'}
+          open={floorMapModalOpen}
+          onClose={() => setFloorMapModalOpen(false)}
+          onSubmit={handleFloorMapSubmit}
+          onRemove={handleFloorMapRemove}
+          initial={floorMap}
+        />
+
         <GroupRectModal
           open={addGroupRectOpen}
           onClose={() => setAddGroupRectOpen(false)}

frontend/src/components/canvas/CanvasContainer.tsx

@@ -22,6 +22,7 @@ import { nodeTypes } from './nodes/nodeTypes'
 import { edgeTypes } from './edges/edgeTypes'
 import { SearchBar } from './SearchBar'
 import { AlignmentGuides } from './AlignmentGuides'
+import { FloorMapLayer } from './FloorMapLayer'
 import { useAlignmentGuides } from '@/hooks/useAlignmentGuides'
 import { setViewportCenterProjector } from '@/utils/viewportCenter'
 import type { NodeData, EdgeData } from '@/types'
@@ -199,6 +200,7 @@ export function CanvasContainer({ onConnect: onConnectProp, onEdgeDoubleClick, o
           size={1}
           color={theme.colors.canvasDotColor}
         />
+        <FloorMapLayer screenToFlowPosition={screenToFlowPosition} />
         <SearchBar onOpenPending={onOpenPending} />
         <AlignmentGuides guides={guides} />
         <Controls>

frontend/src/components/canvas/FloorMapLayer.tsx

@@ -0,0 +1,145 @@
+import { useCallback, useRef } from 'react'
+import { useCanvasStore } from '@/stores/canvasStore'
+
+interface FloorMapLayerProps {
+  screenToFlowPosition: (pos: { x: number; y: number }) => { x: number; y: number }
+}
+
+interface ResizeState {
+  startMouseX: number
+  startMouseY: number
+  startX: number
+  startY: number
+  startW: number
+  startH: number
+  edges: Set<'n' | 's' | 'e' | 'w'>
+}
+
+export function FloorMapLayer({ screenToFlowPosition }: FloorMapLayerProps) {
+  const floorMap = useCanvasStore((s) => s.floorMap)
+  const updateFloorMap = useCanvasStore((s) => s.updateFloorMap)
+
+  const resizeRef = useRef<ResizeState | null>(null)
+
+  const onDragStart = useCallback((e: React.MouseEvent) => {
+    if (!floorMap) return
+    e.stopPropagation()
+    const startX = e.clientX
+    const startY = e.clientY
+    const origPosX = floorMap.posX
+    const origPosY = floorMap.posY
+
+    const onMove = (ev: MouseEvent) => {
+      const start = screenToFlowPosition({ x: startX, y: startY })
+      const cur = screenToFlowPosition({ x: ev.clientX, y: ev.clientY })
+      updateFloorMap({ posX: origPosX + (cur.x - start.x), posY: origPosY + (cur.y - start.y) })
+    }
+    const onUp = () => {
+      window.removeEventListener('mousemove', onMove)
+      window.removeEventListener('mouseup', onUp)
+    }
+    window.addEventListener('mousemove', onMove)
+    window.addEventListener('mouseup', onUp)
+  }, [floorMap, updateFloorMap, screenToFlowPosition])
+
+  const onResizeStart = useCallback((e: React.MouseEvent, edges: Set<'n' | 's' | 'e' | 'w'>) => {
+    if (!floorMap) return
+    e.stopPropagation()
+    resizeRef.current = {
+      startMouseX: e.clientX,
+      startMouseY: e.clientY,
+      startX: floorMap.posX,
+      startY: floorMap.posY,
+      startW: floorMap.width,
+      startH: floorMap.height,
+      edges,
+    }
+
+    const onMove = (ev: MouseEvent) => {
+      const rs = resizeRef.current
+      if (!rs) return
+      const start = screenToFlowPosition({ x: rs.startMouseX, y: rs.startMouseY })
+      const cur = screenToFlowPosition({ x: ev.clientX, y: ev.clientY })
+      const dx = cur.x - start.x
+      const dy = cur.y - start.y
+      let x = rs.startX, y = rs.startY, w = rs.startW, h = rs.startH
+      if (rs.edges.has('w')) { x += dx; w -= dx }
+      if (rs.edges.has('e')) w += dx
+      if (rs.edges.has('n')) { y += dy; h -= dy }
+      if (rs.edges.has('s')) h += dy
+      const MIN = 80
+      if (w < MIN) {
+        if (rs.edges.has('w')) x = rs.startX + rs.startW - MIN
+        w = MIN
+      }
+      if (h < MIN) {
+        if (rs.edges.has('n')) y = rs.startY + rs.startH - MIN
+        h = MIN
+      }
+      updateFloorMap({ posX: x, posY: y, width: w, height: h })
+    }
+    const onUp = () => {
+      resizeRef.current = null
+      window.removeEventListener('mousemove', onMove)
+      window.removeEventListener('mouseup', onUp)
+    }
+    window.addEventListener('mousemove', onMove)
+    window.addEventListener('mouseup', onUp)
+  }, [floorMap, updateFloorMap, screenToFlowPosition])
+
+  if (!floorMap || !floorMap.enabled) return null
+
+  const { imageData, posX, posY, width, height, opacity, locked } = floorMap
+
+  const hs: React.CSSProperties = {
+    position: 'absolute',
+    width: 10,
+    height: 10,
+    background: '#00d4ff',
+    border: '2px solid #0d1117',
+    borderRadius: 2,
+    zIndex: 10,
+  }
+
+  return (
+    <div
+      style={{
+        position: 'absolute',
+        left: posX,
+        top: posY,
+        width,
+        height,
+        opacity,
+        zIndex: -1,
+        pointerEvents: locked ? 'none' : 'auto',
+        cursor: locked ? 'default' : 'move',
+      }}
+      onMouseDown={locked ? undefined : onDragStart}
+    >
+      <img
+        src={imageData}
+        alt="Floor plan"
+        draggable={false}
+        style={{
+          width: '100%',
+          height: '100%',
+          objectFit: 'fill',
+          pointerEvents: 'none',
+          userSelect: 'none',
+        }}
+      />
+      {!locked && (
+        <>
+          <div style={{ ...hs, cursor: 'nw-resize', top: -5, left: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['n','w']))} />
+          <div style={{ ...hs, cursor: 'n-resize', top: -5, left: '50%', marginLeft: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['n']))} />
+          <div style={{ ...hs, cursor: 'ne-resize', top: -5, right: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['n','e']))} />
+          <div style={{ ...hs, cursor: 'e-resize', top: '50%', marginTop: -5, right: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['e']))} />
+          <div style={{ ...hs, cursor: 'se-resize', bottom: -5, right: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['s','e']))} />
+          <div style={{ ...hs, cursor: 's-resize', bottom: -5, left: '50%', marginLeft: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['s']))} />
+          <div style={{ ...hs, cursor: 'sw-resize', bottom: -5, left: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['s','w']))} />
+          <div style={{ ...hs, cursor: 'w-resize', top: '50%', marginTop: -5, left: -5 }} onMouseDown={(e) => onResizeStart(e, new Set(['w']))} />
+        </>
+      )}
+    </div>
+  )
+}

frontend/src/components/canvas/edges/index.tsx

@@ -9,7 +9,7 @@ import {
   type EdgeProps,
   type Edge,
 } from '@xyflow/react'
-import type { EdgeData, EdgeType, Waypoint } from '@/types'
+import type { EdgeData, EdgeType, NodeData, Waypoint } from '@/types'
 import { useThemeStore } from '@/stores/themeStore'
 import { useCanvasStore } from '@/stores/canvasStore'
 import { THEMES } from '@/utils/themes'
@@ -22,6 +22,13 @@ function getVlanColor(vlanId?: number): string {
   return VLAN_COLORS[vlanId % VLAN_COLORS.length]
 }
 
+function getLqiColor(lqi: number): string {
+  if (lqi >= 200) return '#00cc00'
+  if (lqi >= 150) return '#88cc00'
+  if (lqi >= 100) return '#ffaa00'
+  return '#ff3300'
+}
+
 // ── Waypoint drag handle ─────────────────────────────────────────────────────
 
 interface WaypointHandleProps {
@@ -289,7 +296,8 @@ export function HomelableEdge({ id, source, target, sourceHandleId, targetHandle
   const activeTheme = useThemeStore((s) => s.activeTheme)
   const theme = THEMES[activeTheme]
   const sourceType = useStore((s) => s.nodeLookup.get(source)?.type)
-  const targetType = useStore((s) => s.nodeLookup.get(target)?.type)
+  const targetNode = useStore((s) => s.nodeLookup.get(target))
+  const targetType = targetNode?.type
   const isBidirectional = sourceType === 'proxmox' && targetType === 'proxmox'
 
   const waypoints: Waypoint[] = Array.isArray(data?.waypoints) && data.waypoints.length > 0
@@ -315,6 +323,8 @@ export function HomelableEdge({ id, source, target, sourceHandleId, targetHandle
 
   const edgeType: EdgeType = data?.type ?? 'ethernet'
   const edgeColors = theme.colors.edgeColors
+  const highlightedPath = useCanvasStore((s) => s.highlightedPath)
+  const isHighlighted = highlightedPath.includes(id)
 
   const BASE_STYLES: Record<EdgeType, React.CSSProperties> = {
     ethernet: { stroke: edgeColors.ethernet, strokeWidth: 2 },
@@ -328,15 +338,36 @@ export function HomelableEdge({ id, source, target, sourceHandleId, targetHandle
   }
 
   const customColor = data?.custom_color as string | undefined
-  const strokeColor: string = selected
+
+  // Derive LQI color from the target node's properties for iot edges
+  const lqiColor = (edgeType === 'iot' && targetNode?.data?.properties)
+    ? (() => {
+        const props = (targetNode.data as NodeData).properties ?? []
+        const lqiProp = props.find(
+          (p: { key: string; value: string }) => p.key === 'LQI'
+        )
+        if (lqiProp) {
+          const lqi = parseInt(lqiProp.value, 10)
+          if (!isNaN(lqi)) return getLqiColor(lqi)
+        }
+        return null
+      })()
+    : null
+
+  const pathHighlightColor = '#00d4ff'
+  const strokeColor: string = isHighlighted
+    ? pathHighlightColor
+    : selected
     ? theme.colors.edgeSelectedColor
-    : customColor
+    : lqiColor
+    ?? customColor
     ?? (edgeType === 'vlan' ? getVlanColor(data?.vlan_id as number | undefined) : (BASE_STYLES[edgeType].stroke as string ?? edgeColors.ethernet))
 
   const style: React.CSSProperties = {
     ...BASE_STYLES[edgeType],
     ...(edgeType === 'vlan' ? { stroke: getVlanColor(data?.vlan_id as number | undefined) } : {}),
     ...(customColor ? { stroke: customColor } : {}),
+    ...(isHighlighted ? { stroke: pathHighlightColor, strokeWidth: 3, filter: `drop-shadow(0 0 6px ${pathHighlightColor}aa)` } : {}),
     ...(selected ? { stroke: theme.colors.edgeSelectedColor, filter: `drop-shadow(0 0 4px ${theme.colors.edgeSelectedColor}88)` } : {}),
   }
 

frontend/src/components/modals/FloorMapModal.tsx

@@ -0,0 +1,138 @@
+import { useState, useRef } from 'react'
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from '@/components/ui/dialog'
+import { Button } from '@/components/ui/button'
+import { Input } from '@/components/ui/input'
+import { Label } from '@/components/ui/label'
+import type { FloorMapConfig } from '@/types'
+
+interface FloorMapModalProps {
+  open: boolean
+  onClose: () => void
+  onSubmit: (config: FloorMapConfig) => void
+  onRemove: () => void
+  initial: FloorMapConfig | null
+}
+
+export function FloorMapModal({ open, onClose, onSubmit, onRemove, initial }: FloorMapModalProps) {
+  const [imageData, setImageData] = useState(initial?.imageData ?? '')
+  const [width, setWidth] = useState(initial?.width ?? 800)
+  const [height, setHeight] = useState(initial?.height ?? 600)
+  const [opacity, setOpacity] = useState(initial?.opacity ?? 0.8)
+  const [locked, setLocked] = useState(initial?.locked ?? false)
+  const [enabled, setEnabled] = useState(initial?.enabled ?? true)
+  const fileRef = useRef<HTMLInputElement>(null)
+
+  const handleFile = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    const reader = new FileReader()
+    reader.onload = (ev) => {
+      const dataUrl = ev.target?.result as string
+      setImageData(dataUrl)
+      const img = new Image()
+      img.onload = () => {
+        setWidth(img.naturalWidth)
+        setHeight(img.naturalHeight)
+      }
+      img.src = dataUrl
+    }
+    reader.readAsDataURL(file)
+  }
+
+  const handleSubmit = () => {
+    if (!imageData) return
+    onSubmit({
+      imageData,
+      posX: initial?.posX ?? 0,
+      posY: initial?.posY ?? 0,
+      width,
+      height,
+      opacity,
+      locked,
+      enabled,
+    })
+  }
+
+  const hasImage = !!imageData
+
+  return (
+    <Dialog open={open} onOpenChange={(o) => { if (!o) onClose() }}>
+      <DialogContent className="sm:max-w-lg">
+        <DialogHeader>
+          <DialogTitle>{initial ? 'Edit Floor Plan' : 'Import Floor Plan'}</DialogTitle>
+        </DialogHeader>
+
+        <div className="flex flex-col gap-4 py-2">
+          {!hasImage ? (
+            <div
+              className="flex flex-col items-center justify-center gap-2 border-2 border-dashed border-[#30363d] rounded-lg p-8 cursor-pointer hover:border-[#00d4ff]/50 transition-colors"
+              onClick={() => fileRef.current?.click()}
+            >
+              <input ref={fileRef} type="file" accept="image/png,image/jpeg,image/webp" className="hidden" onChange={handleFile} />
+              <span className="text-muted-foreground text-sm">Click to select a floor plan image</span>
+              <span className="text-muted-foreground/50 text-xs">PNG, JPEG or WebP</span>
+            </div>
+          ) : (
+            <>
+              <div className="relative rounded-lg overflow-hidden border border-[#30363d]" style={{ maxHeight: 200 }}>
+                <img src={imageData} alt="Floor plan preview" className="w-full h-full object-contain" style={{ opacity }} />
+              </div>
+
+              <div className="flex items-center gap-2">
+                <Button size="sm" variant="secondary" className="cursor-pointer" onClick={() => fileRef.current?.click()}>
+                  Replace Image
+                </Button>
+                <input ref={fileRef} type="file" accept="image/png,image/jpeg,image.webp" className="hidden" onChange={handleFile} />
+              </div>
+
+              <div className="grid grid-cols-2 gap-4">
+                <div className="flex flex-col gap-1.5">
+                  <Label className="text-xs text-muted-foreground">Width (px)</Label>
+                  <Input type="number" value={width} onChange={(e) => setWidth(Math.max(80, Number(e.target.value)))} className="bg-[#21262d] border-[#30363d] text-xs h-8" />
+                </div>
+                <div className="flex flex-col gap-1.5">
+                  <Label className="text-xs text-muted-foreground">Height (px)</Label>
+                  <Input type="number" value={height} onChange={(e) => setHeight(Math.max(80, Number(e.target.value)))} className="bg-[#21262d] border-[#30363d] text-xs h-8" />
+                </div>
+              </div>
+
+              <div className="flex flex-col gap-1.5">
+                <Label className="text-xs text-muted-foreground">Opacity: {Math.round(opacity * 100)}%</Label>
+                <input
+                  type="range" min="0.05" max="1" step="0.05" value={opacity}
+                  onChange={(e) => setOpacity(Number(e.target.value))}
+                  className="w-full accent-[#00d4ff]"
+                />
+              </div>
+
+              <div className="flex items-center gap-6">
+                <label className="flex items-center gap-2 cursor-pointer">
+                  <input type="checkbox" checked={locked} onChange={(e) => setLocked(e.target.checked)} className="accent-[#00d4ff] w-3.5 h-3.5" />
+                  <span className="text-xs text-muted-foreground">Lock position & size</span>
+                </label>
+                <label className="flex items-center gap-2 cursor-pointer">
+                  <input type="checkbox" checked={enabled} onChange={(e) => setEnabled(e.target.checked)} className="accent-[#00d4ff] w-3.5 h-3.5" />
+                  <span className="text-xs text-muted-foreground">Show on canvas</span>
+                </label>
+              </div>
+            </>
+          )}
+        </div>
+
+        <DialogFooter className="flex items-center justify-between sm:justify-between">
+          {hasImage && initial && (
+            <Button size="sm" variant="destructive" className="cursor-pointer" onClick={onRemove}>
+              Remove
+            </Button>
+          )}
+          <div className="flex gap-2 ml-auto">
+            <Button size="sm" variant="ghost" className="cursor-pointer" onClick={onClose}>Cancel</Button>
+            <Button size="sm" className="bg-[#00d4ff] text-[#0d1117] hover:bg-[#00d4ff]/90 cursor-pointer" disabled={!hasImage} onClick={handleSubmit}>
+              {initial ? 'Apply' : 'Import'}
+            </Button>
+          </div>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  )
+}

frontend/src/components/panels/DetailPanel.tsx

@@ -1,4 +1,4 @@
-import { createElement, useRef, useState } from 'react'
+import { createElement, useEffect, useRef, useState } from 'react'
 import { X, Edit, Trash2, ExternalLink, Plus, Pencil, Layers, Ungroup, Eye, EyeOff } from 'lucide-react'
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
@@ -9,6 +9,8 @@ import { getServiceUrl } from '@/utils/serviceUrl'
 import { splitIps } from '@/utils/maskIp'
 import { PROPERTY_ICONS, PROPERTY_ICON_NAMES, resolvePropertyIcon } from '@/utils/propertyIcons'
 import { formatTimestamp } from '@/utils/timeFormat'
+import { findZigbeePath } from '@/utils/zigbeePathfinding'
+import { isZigbeeType } from '@/utils/zigbeeProperties'
 import type { Node } from '@xyflow/react'
 
 interface DetailPanelProps {
@@ -22,7 +24,7 @@ type PropForm = { key: string; value: string; icon: string | null; visible: bool
 const EMPTY_PROP: PropForm = { key: '', value: '', icon: null, visible: true }
 
 export function DetailPanel({ onEdit }: DetailPanelProps) {
-  const { nodes, selectedNodeId, selectedNodeIds, setSelectedNode, deleteNode, updateNode, snapshotHistory, createGroup, ungroup, removeFromGroup, setNodeSize } = useCanvasStore()
+  const { nodes, edges, selectedNodeId, selectedNodeIds, setSelectedNode, deleteNode, updateNode, snapshotHistory, createGroup, ungroup, removeFromGroup, setNodeSize, setHighlightedPath } = useCanvasStore()
   const serviceStatuses = useCanvasStore((s) => s.serviceStatuses)
 
   const [addingForNode, setAddingForNode] = useState<string | null>(null)
@@ -41,6 +43,25 @@ export function DetailPanel({ onEdit }: DetailPanelProps) {
   // Multi-select panel
   const multiSelected = (selectedNodeIds ?? []).filter((id) => nodes.some((n) => n.id === id))
 
+  // Zigbee path highlighting: when a zigbee node is selected, compute
+  // the optimal route to the coordinator and highlight those edges.
+  useEffect(() => {
+    const targetNode = nodes.find((n) => n.id === selectedNodeId)
+    if (!targetNode || !isZigbeeType(targetNode.data.type)) {
+      setHighlightedPath([])
+      return
+    }
+
+    const coordinator = nodes.find((n) => n.data.type === 'zigbee_coordinator')
+    if (!coordinator) {
+      setHighlightedPath([])
+      return
+    }
+
+    const path = findZigbeePath(targetNode.id, coordinator.id, nodes, edges)
+    setHighlightedPath(path)
+  }, [selectedNodeId, nodes, edges, setHighlightedPath])
+
   if (multiSelected.length > 1) {
     return (
       <MultiSelectPanel

frontend/src/components/panels/Sidebar.tsx

@@ -1,5 +1,5 @@
 import { useState, useCallback } from 'react'
-import { Plus, Save, ScanLine, ChevronLeft, ChevronRight, LayoutDashboard, Clock, EyeOff, Square, Settings, LogOut, Network, RadioTower, Type, PlusCircle, Pencil, Trash2 } from 'lucide-react'
+import { Plus, Save, ScanLine, ChevronLeft, ChevronRight, LayoutDashboard, Clock, EyeOff, Square, Settings, LogOut, Network, RadioTower, Type, PlusCircle, Pencil, Trash2, Image } from 'lucide-react'
 import { Logo } from '@/components/ui/Logo'
 import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip'
 import { useCanvasStore } from '@/stores/canvasStore'
@@ -27,13 +27,14 @@ interface SidebarProps {
   onScan: () => void
   onZigbeeImport: () => void
   onZwaveImport: () => void
+  onFloorMap: () => void
   onSave: () => void
   onOpenSettings: () => void
   onOpenHistory: () => void
   onOpenPending: (deviceId?: string, status?: 'pending' | 'hidden') => void
 }
 
-export function Sidebar({ onAddNode, onAddGroupRect, onAddText, onScan, onZigbeeImport, onZwaveImport, onSave, onOpenSettings, onOpenHistory, onOpenPending }: SidebarProps) {
+export function Sidebar({ onAddNode, onAddGroupRect, onAddText, onScan, onZigbeeImport, onZwaveImport, onFloorMap, onSave, onOpenSettings, onOpenHistory, onOpenPending }: SidebarProps) {
   const [collapsed, setCollapsed] = useState(false)
   const logout = useAuthStore((s) => s.logout)
   const { designs, activeDesignId, setActiveDesign, addDesign, updateDesign, removeDesign } = useDesignStore()
@@ -76,7 +77,7 @@ export function Sidebar({ onAddNode, onAddGroupRect, onAddText, onScan, onZigbee
     }
   }, [designs.length, removeDesign])
 
-  const { nodes, hasUnsavedChanges } = useCanvasStore()
+  const { nodes, hasUnsavedChanges, floorMap } = useCanvasStore()
 
   const networkNodes = nodes.filter((n) => n.data.type !== 'groupRect' && n.data.type !== 'text')
   const onlineCount = networkNodes.filter((n) => n.data.status === 'online').length
@@ -228,6 +229,7 @@ export function Sidebar({ onAddNode, onAddGroupRect, onAddText, onScan, onZigbee
         {!STANDALONE && <SidebarItem icon={ScanLine} label="Scan Network" collapsed={collapsed} onClick={handleScan} />}
         {!STANDALONE && <SidebarItem icon={Network} label="Zigbee Import" collapsed={collapsed} onClick={onZigbeeImport} />}
         {!STANDALONE && <SidebarItem icon={RadioTower} label="Z-Wave Import" collapsed={collapsed} onClick={onZwaveImport} />}
+        <SidebarItem icon={Image} label={floorMap ? 'Edit Floor Plan' : 'Add Floor Plan'} collapsed={collapsed} onClick={onFloorMap} />
         <SidebarItem
           icon={Save}
           label="Save Canvas"

frontend/src/components/panels/__tests__/DetailPanel.test.tsx

@@ -37,6 +37,8 @@ function setupStore(nodeData: Partial<NodeData> = {}, serviceStatuses: Record<st
     createGroup: vi.fn(),
     ungroup: vi.fn(),
     setNodeSize: vi.fn(),
+    setHighlightedPath: vi.fn(),
+    edges: [],
     serviceStatuses,
   }
   // Support both the bare destructure call and the selector-based call.
@@ -57,6 +59,8 @@ describe('DetailPanel', () => {
       snapshotHistory: vi.fn(),
       createGroup: vi.fn(),
       ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
     } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
   })
 
@@ -130,6 +134,8 @@ describe('DetailPanel', () => {
         snapshotHistory: vi.fn(),
         createGroup: vi.fn(),
         ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
 
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -157,6 +163,8 @@ describe('DetailPanel', () => {
         snapshotHistory: vi.fn(),
         createGroup: vi.fn(),
         ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
 
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -178,6 +186,8 @@ describe('DetailPanel', () => {
         snapshotHistory: vi.fn(),
         createGroup: vi.fn(),
         ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
 
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -199,6 +209,8 @@ describe('DetailPanel', () => {
         snapshotHistory: vi.fn(),
         createGroup: vi.fn(),
         ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
 
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -253,6 +265,8 @@ describe('DetailPanel', () => {
         deleteNode: vi.fn(),
         updateNode: vi.fn(),
         snapshotHistory: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       render(<DetailPanel onEdit={vi.fn()} />)
       fireEvent.click(screen.getByLabelText('Close panel'))
@@ -277,6 +291,8 @@ describe('DetailPanel', () => {
         deleteNode,
         updateNode: vi.fn(),
         snapshotHistory,
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       vi.spyOn(window, 'confirm').mockReturnValue(true)
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -295,6 +311,8 @@ describe('DetailPanel', () => {
         deleteNode,
         updateNode: vi.fn(),
         snapshotHistory,
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       vi.spyOn(window, 'confirm').mockReturnValue(false)
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -326,6 +344,8 @@ describe('DetailPanel', () => {
         snapshotHistory: vi.fn(),
         createGroup: vi.fn(),
         ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       render(<DetailPanel onEdit={vi.fn()} />)
       // Two "Add" header buttons: first = properties, second = services
@@ -351,6 +371,8 @@ describe('DetailPanel', () => {
         snapshotHistory: vi.fn(),
         createGroup: vi.fn(),
         ungroup: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       render(<DetailPanel onEdit={vi.fn()} />)
       const addHeaders = screen.getAllByText('Add')
@@ -374,6 +396,8 @@ describe('DetailPanel', () => {
         deleteNode: vi.fn(),
         updateNode,
         snapshotHistory: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       render(<DetailPanel onEdit={vi.fn()} />)
       fireEvent.click(screen.getByTitle('Remove service'))
@@ -389,6 +413,8 @@ describe('DetailPanel', () => {
         deleteNode: vi.fn(),
         updateNode: vi.fn(),
         snapshotHistory: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
       expect(() => render(<DetailPanel onEdit={vi.fn()} />)).not.toThrow()
     })
@@ -420,6 +446,8 @@ describe('DetailPanel', () => {
         deleteNode: vi.fn(),
         updateNode,
         snapshotHistory: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
 
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -445,6 +473,8 @@ describe('DetailPanel', () => {
         deleteNode: vi.fn(),
         updateNode,
         snapshotHistory: vi.fn(),
+      setHighlightedPath: vi.fn(),
+      edges: [],
       } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
 
       render(<DetailPanel onEdit={vi.fn()} />)
@@ -608,6 +638,7 @@ describe('DetailPanel', () => {
     function setupSized(node: Partial<Node<NodeData>>, setNodeSize = vi.fn()) {
       const state = {
         nodes: [{ ...makeNode({}), ...node }],
+        edges: [],
         selectedNodeId: 'n1',
         selectedNodeIds: [],
         setSelectedNode: vi.fn(),
@@ -617,6 +648,7 @@ describe('DetailPanel', () => {
         createGroup: vi.fn(),
         ungroup: vi.fn(),
         setNodeSize,
+        setHighlightedPath: vi.fn(),
         serviceStatuses: {},
       }
       vi.mocked(canvasStore.useCanvasStore).mockImplementation(

frontend/src/components/panels/__tests__/GroupPanels.test.tsx

@@ -34,6 +34,7 @@ function makeGroupNode(id = 'g1', label = 'My Group', showBorder = true) {
 
 const mockStore = {
   nodes: [],
+  edges: [],
   selectedNodeId: null,
   selectedNodeIds: [],
   setSelectedNode: vi.fn(),
@@ -43,6 +44,7 @@ const mockStore = {
   createGroup: vi.fn(),
   ungroup: vi.fn(),
   removeFromGroup: vi.fn(),
+  setHighlightedPath: vi.fn(),
 }
 
 function setupStore(overrides = {}) {

frontend/src/stores/canvasStore.ts

@@ -9,7 +9,7 @@ import {
   applyEdgeChanges,
   addEdge,
 } from '@xyflow/react'
-import type { NodeData, EdgeData, NodeType, EdgeType, NodeTypeStyle, EdgeTypeStyle, CustomStyleDef, ServiceStatus } from '@/types'
+import type { NodeData, EdgeData, NodeType, EdgeType, NodeTypeStyle, EdgeTypeStyle, CustomStyleDef, ServiceStatus, FloorMapConfig } from '@/types'
 import { generateUUID } from '@/utils/uuid'
 import { normalizeHandle, removedBottomHandleIds } from '@/utils/handleUtils'
 import { applyOpacity } from '@/utils/colorUtils'
@@ -35,6 +35,12 @@ interface CanvasState {
   // Live per-service status overlay (not persisted), keyed via serviceStatusKey.
   serviceStatuses: Record<string, ServiceStatus>
 
+  floorMap: FloorMapConfig | null
+  setFloorMap: (config: FloorMapConfig | null) => void
+  updateFloorMap: (patch: Partial<FloorMapConfig>) => void
+  highlightedPath: string[]
+  setHighlightedPath: (edgeIds: string[]) => void
+
   // History
   past: HistoryEntry[]
   future: HistoryEntry[]
@@ -98,6 +104,8 @@ export const useCanvasStore = create<CanvasState>((set) => ({
   hideIp: readHideIp(),
   scanEventTs: 0,
   serviceStatuses: {},
+  floorMap: null,
+  highlightedPath: [],
   fitViewPending: false,
 
   past: [],
@@ -747,6 +755,16 @@ export const useCanvasStore = create<CanvasState>((set) => ({
     set({ hideIp: value })
   },
 
+  setFloorMap: (config) => set({ floorMap: config, hasUnsavedChanges: true }),
+
+  updateFloorMap: (patch) =>
+    set((state) => ({
+      floorMap: state.floorMap ? { ...state.floorMap, ...patch } : null,
+      hasUnsavedChanges: true,
+    })),
+
+  setHighlightedPath: (edgeIds) => set({ highlightedPath: edgeIds }),
+
   loadCanvas: (nodes, edges) => {
     // React Flow requires parents before children in the array
     const parents = nodes.filter((n) => !n.parentId)

frontend/src/types/index.ts

@@ -252,3 +252,14 @@ export interface CustomStyleDef {
   nodes: Partial<Record<NodeType, NodeTypeStyle>>
   edges: Partial<Record<EdgeType, EdgeTypeStyle>>
 }
+
+export interface FloorMapConfig {
+  imageData: string
+  posX: number
+  posY: number
+  width: number
+  height: number
+  opacity: number
+  locked: boolean
+  enabled: boolean
+}

frontend/src/utils/standaloneStorage.ts

@@ -11,7 +11,7 @@
  * default design on first run so existing users keep their canvas.
  */
 import type { Node, Edge } from '@xyflow/react'
-import type { Design, DesignType, NodeData, EdgeData, CustomStyleDef } from '@/types'
+import type { Design, DesignType, NodeData, EdgeData, CustomStyleDef, FloorMapConfig } from '@/types'
 import type { ThemeId } from '@/utils/themes'
 import { generateUUID } from '@/utils/uuid'
 
@@ -24,6 +24,7 @@ export interface StandaloneCanvas {
   edges: Edge<EdgeData>[]
   theme_id?: ThemeId
   custom_style?: CustomStyleDef | null
+  floorMap?: FloorMapConfig
 }
 
 function readJSON<T>(key: string): T | null {

frontend/src/utils/zigbeePathfinding.ts

@@ -0,0 +1,89 @@
+import type { Node, Edge } from '@xyflow/react'
+import type { NodeData, EdgeData } from '@/types'
+
+function getNodeLqi(node: Node<NodeData>): number {
+  const lqiProp = node.data.properties?.find((p) => p.key === 'LQI')
+  if (!lqiProp) return 255
+  const lqi = parseInt(lqiProp.value, 10)
+  return isNaN(lqi) ? 255 : lqi
+}
+
+/**
+ * Run Dijkstra on the Zigbee `iot` edge subgraph from `startNodeId` to
+ * `targetNodeId`. Returns the ordered list of edge IDs forming the optimal
+ * path, or an empty array if no path exists.
+ *
+ * Edge cost = 255 - LQI, where LQI is read from the edge's target node
+ * properties (higher LQI = lower cost). For reverse traversal, the same
+ * cost is used.
+ */
+export function findZigbeePath(
+  startNodeId: string,
+  targetNodeId: string,
+  nodes: Node<NodeData>[],
+  edges: Edge<EdgeData>[],
+): string[] {
+  if (startNodeId === targetNodeId) return []
+
+  const iotEdges = edges.filter((e) => (e.data?.type ?? 'ethernet') === 'iot')
+  if (iotEdges.length === 0) return []
+
+  const nodeMap = new Map(nodes.map((n) => [n.id, n]))
+  const adjacency = new Map<string, { neighbor: string; edgeId: string; cost: number }[]>()
+
+  for (const e of iotEdges) {
+    const targetLqi = nodeMap.get(e.target) ? getNodeLqi(nodeMap.get(e.target)!) : 255
+    const sourceLqi = nodeMap.get(e.source) ? getNodeLqi(nodeMap.get(e.source)!) : 255
+    const cost = 255 - Math.min(targetLqi, sourceLqi)
+
+    if (!adjacency.has(e.source)) adjacency.set(e.source, [])
+    if (!adjacency.has(e.target)) adjacency.set(e.target, [])
+
+    adjacency.get(e.source)!.push({ neighbor: e.target, edgeId: e.id, cost })
+    adjacency.get(e.target)!.push({ neighbor: e.source, edgeId: e.id, cost })
+  }
+
+  if (!adjacency.has(startNodeId) || !adjacency.has(targetNodeId)) return []
+
+  const dist = new Map<string, number>()
+  const prev = new Map<string, { node: string; edgeId: string }>()
+  const unvisited = new Set(adjacency.keys())
+
+  for (const nodeId of unvisited) dist.set(nodeId, Infinity)
+  dist.set(startNodeId, 0)
+
+  while (unvisited.size > 0) {
+    let current: string | null = null
+    let minDist = Infinity
+    for (const nodeId of unvisited) {
+      const d = dist.get(nodeId)!
+      if (d < minDist) { minDist = d; current = nodeId }
+    }
+    if (current === null || minDist === Infinity) break
+    if (current === targetNodeId) break
+
+    unvisited.delete(current)
+
+    const neighbors = adjacency.get(current) ?? []
+    for (const { neighbor, edgeId, cost } of neighbors) {
+      if (!unvisited.has(neighbor)) continue
+      const alt = dist.get(current)! + cost
+      if (alt < (dist.get(neighbor) ?? Infinity)) {
+        dist.set(neighbor, alt)
+        prev.set(neighbor, { node: current, edgeId })
+      }
+    }
+  }
+
+  // Reconstruct path: walk from targetNodeId back to startNodeId
+  const pathEdges: string[] = []
+  let current = targetNodeId
+  while (current !== startNodeId) {
+    const p = prev.get(current)
+    if (!p) return []
+    pathEdges.unshift(p.edgeId)
+    current = p.node
+  }
+
+  return pathEdges
+}