UX overhaul: routing, accessibility, feedback, and polish

Add react-router-dom for URL-based navigation with browser
back/forward, deep links, and bookmarks. Replace window.confirm()
with styled ConfirmDialog. Add toast notifications and success
feedback on consume/audit/gone flows. Add escape-to-close and
focus trapping on modals. Add entrance animations for drawers,
modals, and toasts. Make grids responsive, add sortable inventory
headers, working CSV/JSON export, time-aware greeting, focus-visible
outlines, search clear button, and hover chevrons on inventory rows.

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

web/package-lock.json

@@ -10,7 +10,8 @@
       "dependencies": {
         "@tanstack/react-query": "^5.62.7",
         "react": "^18.3.1",
-        "react-dom": "^18.3.1"
+        "react-dom": "^18.3.1",
+        "react-router-dom": "^7.14.2"
       },
       "devDependencies": {
         "@types/react": "^18.3.17",
@@ -1341,6 +1342,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cookie": {
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+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.1.1.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
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     "node_modules/csstype": {
       "version": "3.2.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.2.3.tgz",
@@ -1605,6 +1619,44 @@
         "node": ">=0.10.0"
       }
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+    "node_modules/react-router": {
+      "version": "7.14.2",
+      "resolved": "https://registry.npmjs.org/react-router/-/react-router-7.14.2.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "cookie": "^1.0.1",
+        "set-cookie-parser": "^2.6.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/react-router-dom": {
+      "version": "7.14.2",
+      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-7.14.2.tgz",
+      "integrity": "sha512-YZcM5ES8jJSM+KrJ9BdvHHqlnGTg5tH3sC5ChFRj4inosKctdyzBDhOyyHdGk597q2OT6NTrCA1OvB/YDwfekQ==",
+      "license": "MIT",
+      "dependencies": {
+        "react-router": "7.14.2"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
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     "node_modules/rollup": {
       "version": "4.60.2",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.60.2.tgz",
@@ -1669,6 +1721,12 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/set-cookie-parser": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
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+      "license": "MIT"
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",