fix: e2e QA hardening — honest runtime URLs, health, and read-only anon UI

Backend:
- managed DB provisioning: attach DB containers to the platform network and
  probe the container IP, fixing the 127.0.0.1 reachability failure inside
  the backend container; log provisioning failures
- stop fabricating connection URLs when provisioning produced none
- template deploys now carry port + health_check into service runtime fields
- service health probed over the project network (backend joins it) instead
  of an in-container wget that fails on shell-less images
- runtime/public/connection URLs rewrite loopback to the request Host so
  links are usable for LAN/remote clients

Frontend:
- service Networking panel shows real runtime URLs/ports/health instead of
  hardcoded containr.dev + 8080->443
- anonymous views hide all mutation controls (new project, add service,
  group, context menu)
- project cards: remove decorative svcN labels; badge says DOWN only when
  zero services run, IDLE when empty, DEGRADED for partial
- mobile projects header no longer clips (fluid search width)
- unknown routes render a not-found page instead of silently redirecting

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/backend/internal/api/databases_test.go

@@ -51,15 +51,16 @@ func TestDatabaseConnectionURLAndDefaultVersion(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		url := handler.generateConnectionURL(DatabaseService{
-			Type: tc.dbType,
-			Name: "example",
-		})
-		if url == "" {
-			t.Fatalf("generateConnectionURL returned empty for type %q", tc.dbType)
+		plan, err := buildDatabaseRuntimePlan(tc.dbType, "example", nil)
+		if err != nil {
+			t.Fatalf("buildDatabaseRuntimePlan(%q) failed: %v", tc.dbType, err)
 		}
+		url := plan.ConnectionURL("15432")
 		if len(tc.urlContains) > 0 && !strings.HasPrefix(url, tc.urlContains) {
-			t.Fatalf("generateConnectionURL(%q) = %q, expected prefix %q", tc.dbType, url, tc.urlContains)
+			t.Fatalf("ConnectionURL(%q) = %q, expected prefix %q", tc.dbType, url, tc.urlContains)
+		}
+		if !strings.Contains(url, ":15432") {
+			t.Fatalf("ConnectionURL(%q) = %q, expected published port", tc.dbType, url)
 		}
 
 		gotVersion := handler.getDefaultVersion(tc.dbType)
@@ -69,6 +70,17 @@ func TestDatabaseConnectionURLAndDefaultVersion(t *testing.T) {
 	}
 }
 
+func TestResolveConnectionURLNeverFabricates(t *testing.T) {
+	handler := &DatabaseHandler{}
+
+	if got := handler.resolveConnectionURL(DatabaseService{Type: "postgresql", Name: "example"}); got != "" {
+		t.Fatalf("resolveConnectionURL with no stored URL = %q, want empty", got)
+	}
+	if got := handler.resolveConnectionURL(DatabaseService{ConnectionURL: "postgresql://u:p@localhost:15432/db"}); got != "postgresql://u:p@localhost:15432/db" {
+		t.Fatalf("resolveConnectionURL = %q, want stored URL", got)
+	}
+}
+
 func TestBuildDatabaseRuntimePlanSupportsAllTypes(t *testing.T) {
 	cases := []struct {
 		dbType        string
@@ -199,3 +211,23 @@ func TestHumanReadableBytes(t *testing.T) {
 		}
 	}
 }
+
+func TestRewriteLoopbackURL(t *testing.T) {
+	tests := []struct {
+		name, raw, host, want string
+	}{
+		{"service url", "http://localhost:35981", "10.0.0.182", "http://10.0.0.182:35981"},
+		{"db url keeps creds", "postgresql://u:p@localhost:35432/db?sslmode=disable", "10.0.0.182", "postgresql://u:[email protected]:35432/db?sslmode=disable"},
+		{"ipv4 loopback", "redis://:[email protected]:36379/0", "host.lan", "redis://:[email protected]:36379/0"},
+		{"unspecified", "http://0.0.0.0:9000/x", "10.0.0.182", "http://10.0.0.182:9000/x"},
+		{"external host untouched", "https://example.com:443/x", "10.0.0.182", "https://example.com:443/x"},
+		{"empty raw", "", "10.0.0.182", ""},
+		{"empty host", "http://localhost:35981", "", "http://localhost:35981"},
+		{"no port", "http://localhost/path", "10.0.0.182", "http://10.0.0.182/path"},
+	}
+	for _, tt := range tests {
+		if got := rewriteLoopbackURL(tt.raw, tt.host); got != tt.want {
+			t.Errorf("%s: rewriteLoopbackURL(%q,%q) = %q, want %q", tt.name, tt.raw, tt.host, got, tt.want)
+		}
+	}
+}