feat(electrobun): project wizard phases 1-5 (WIP)

- sanitize.ts: input sanitization (trim, control chars, path traversal)
- provider-scanner.ts: detect Claude/Codex/Ollama/Gemini availability
- model-fetcher.ts: live model lists from 4 provider APIs
- ModelConfigPanel.svelte: per-provider config (thinking, effort, sandbox, temperature)
- WizardStep1-3.svelte: split wizard into composable steps
- CustomDropdown/Checkbox/Radio: themed UI components
- provider-handlers.ts: provider.scan + provider.models RPC
- Wire providers into wizard step 3 (live detection + model lists)
- Replace native selects in 5 settings panels with CustomDropdown

ui-electrobun/package-lock.json

@@ -30,6 +30,7 @@
 				"@xterm/xterm": "^6.0.0",
 				"dompurify": "^3.3.3",
 				"electrobun": "latest",
+				"lucide-svelte": "^0.577.0",
 				"pdfjs-dist": "^5.5.207"
 			},
 			"devDependencies": {
@@ -2168,6 +2169,15 @@
 				"node": ">=12"
 			}
 		},
+		"node_modules/lucide-svelte": {
+			"version": "0.577.0",
+			"resolved": "https://registry.npmjs.org/lucide-svelte/-/lucide-svelte-0.577.0.tgz",
+			"integrity": "sha512-0i88o57KsaHWnc80J57fY99CWzlZsSdtH5kKjLUJa7z8dum/9/AbINNLzJ7NiRFUdOgMnfAmJt8jFbW2zeC5qQ==",
+			"license": "ISC",
+			"peerDependencies": {
+				"svelte": "^3 || ^4 || ^5.0.0-next.42"
+			}
+		},
 		"node_modules/magic-string": {
 			"version": "0.30.21",
 			"dev": true,