fix: instance link includes domain, project delete cleans up containers and proxies

- InstanceCard appends settings domain to subdomain link (stage-dev-app.example.com instead of just stage-dev-app)
- Project deletion now removes Docker containers and proxy routes before deleting DB records
- Pass domain from settings to InstanceCard via project detail page

web/src/routes/projects/[id]/+page.svelte

@@ -106,6 +106,7 @@
 		}
 	}
 	let tagsLoading = $state(false);
+	let settingsDomain = $state('');
 
 	let showDeleteConfirm = $state(false);
 
@@ -142,6 +143,11 @@
 			} catch {
 				deploys = [];
 			}
+
+			try {
+				const settings = await api.getSettings();
+				settingsDomain = settings.domain ?? '';
+			} catch { /* non-critical */ }
 		} catch (e) {
 			error = e instanceof Error ? e.message : $t('projectDetail.loadFailed');
 		} finally {
@@ -486,6 +492,7 @@
 											<InstanceCard
 												{instance}
 												{projectId}
+												domain={settingsDomain}
 												onchange={loadProject}
 											/>
 										{/each}