Add ECharts, CodeMirror, and axe-core for Phase 5

ECharts backs the new charting layer, the @codemirror packages back
the query editor's syntax highlighting and autocomplete, and axe-core
(dev-only) drives the automated accessibility sweep. Drops uplot, which
the chart rebuild replaces entirely.

web/package.json

@@ -15,13 +15,19 @@
 		"@sveltejs/adapter-static": "^3.0.10",
 		"@sveltejs/kit": "^2.63.0",
 		"@sveltejs/vite-plugin-svelte": "^7.1.2",
+		"axe-core": "^4.13.0",
 		"svelte": "^5.56.1",
 		"svelte-check": "^4.6.0",
 		"typescript": "^6.0.3",
 		"vite": "^8.0.16"
 	},
 	"dependencies": {
-		"gridstack": "^11.5.0",
-		"uplot": "^1.6.32"
+		"@codemirror/autocomplete": "^6.20.3",
+		"@codemirror/commands": "^6.10.4",
+		"@codemirror/language": "^6.12.4",
+		"@codemirror/state": "^6.7.1",
+		"@codemirror/view": "^6.43.8",
+		"echarts": "^6.1.0",
+		"gridstack": "^11.5.0"
 	}
 }