fix: restore frontend CI after dividing streamline changes

Remove the unsupported dividing streamline WASM imports that broke the frontend build, fall back to the existing contour-based streamline path, and update deployment actions to current major versions.

Made-with: Cursor

Author: aeronauty

.github/workflows/deploy-foil.yml

@@ -29,7 +29,7 @@ jobs:
       PUBLIC_URL: https://foil.flexcompute.com/flexfoil/
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
@@ -43,7 +43,7 @@ jobs:
           wasm-pack build --target web --release --out-dir ../../pkg
 
       - name: Setup Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: 20
           cache: npm

.github/workflows/deploy.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
@@ -33,7 +33,7 @@ jobs:
           wasm-pack build --target web --release --out-dir ../../pkg
 
       - name: Setup Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: 20
           cache: npm

flexfoil-ui/src/components/AirfoilCanvas.tsx

@@ -23,7 +23,7 @@ import { useRouteUiStore } from '../stores/routeUiStore';
 import { useTheme } from '../contexts/ThemeContext';
 import { useLayout } from '../contexts/LayoutContext';
 import type { Point, ViewportState, AirfoilPoint } from '../types';
-import { computeDividingStreamline, computeStreamlines, computePsiGrid, createSmokeSystem, isWasmReady, analyzeAirfoil, computeGamma, getBLVisualizationData, type BLVisualizationData, type WasmSmokeSystem } from '../lib/wasm';
+import { computeStreamlines, computePsiGrid, createSmokeSystem, isWasmReady, analyzeAirfoil, computeGamma, getBLVisualizationData, type BLVisualizationData, type WasmSmokeSystem } from '../lib/wasm';
 import { useMorphingAnimation, getCpColor, computeForceVectors } from '../hooks/useMorphingAnimation';
 import { generateCamberSplineCurve } from '../lib/airfoilGeometry';
 import { WebGPURenderer, checkWebGPUSupport } from '../lib/webgpu';
@@ -870,25 +870,8 @@ export function AirfoilCanvas() {
         }
       }
 
-      let psi0Lines: [number, number][][] = [];
-      const dividingResult = computeDividingStreamline(
-        panels,
-        displayAlpha,
-        reynolds,
-        bounds,
-        mach,
-        ncrit,
-        maxIterations,
-        solverMode
-      );
-
-      if (dividingResult.success && dividingResult.streamline.length >= 2) {
-        psi0Lines = [dividingResult.streamline];
-      } else {
-        // Fall back to the contour-derived branch if the streamline bracketing fails.
-        const psi0Segments = marchingSquares(grid, nx, ny, psi_0, bounds[0], bounds[2], dx, dy);
-        psi0Lines = connectSegments(psi0Segments).filter(line => line.length >= 2);
-      }
+      const psi0Segments = marchingSquares(grid, nx, ny, psi_0, bounds[0], bounds[2], dx, dy);
+      let psi0Lines = connectSegments(psi0Segments).filter(line => line.length >= 2);
 
       // Filter out parts of dividing streamline that are inside the airfoil
       // Split lines at airfoil boundary and keep only exterior segments
@@ -912,10 +895,7 @@ export function AirfoilCanvas() {
       }
       psi0Lines = filteredPsi0Lines;
 
-      if (!(dividingResult.success && dividingResult.streamline.length >= 2)) {
-        // Only use the contour cleanup path for the marching-squares fallback.
-        psi0Lines = extrapolateDividingStreamline(psi0Lines, panels);
-      }
+      psi0Lines = extrapolateDividingStreamline(psi0Lines, panels);
 
       setPsiContours({ 
         grid, 

flexfoil-ui/src/lib/wasm.ts

@@ -14,8 +14,6 @@ import init, {
     analyze_airfoil_faithful,
     compute_streamlines as compute_streamlines_inviscid_wasm,
     compute_streamlines_faithful,
-    compute_dividing_streamline as compute_dividing_streamline_inviscid_wasm,
-    compute_dividing_streamline_faithful,
     compute_psi_grid as compute_psi_grid_inviscid_wasm,
     compute_psi_grid_faithful,
     get_bl_distribution_faithful,
@@ -505,12 +503,6 @@ export interface StreamlineResult {
     error?: string;
 }
 
-export interface DividingStreamlineResult {
-    streamline: [number, number][];
-    success: boolean;
-    error?: string;
-}
-
 /**
  * Compute streamlines for flow visualization.
  * 
@@ -555,40 +547,6 @@ export function computeStreamlines(
     ) as StreamlineResult;
 }
 
-export function computeDividingStreamline(
-    coordinates: { x: number; y: number }[],
-    alphaDeg: number,
-    reynolds: number = 1e6,
-    bounds: [number, number, number, number] = [-0.5, 2.0, -0.5, 0.5],
-    mach: number = 0,
-    ncrit: number = 9,
-    maxIterations: number = 100,
-    solverMode: 'inviscid' | 'viscous' = 'viscous'
-): DividingStreamlineResult {
-    if (!initialized) {
-        throw new Error('WASM not initialized. Call initWasm() first.');
-    }
-
-    const coordsFlat = pointsToFlat(coordinates);
-    if (solverMode === 'inviscid') {
-        return compute_dividing_streamline_inviscid_wasm(
-            coordsFlat,
-            alphaDeg,
-            new Float64Array(bounds)
-        ) as DividingStreamlineResult;
-    }
-
-    return compute_dividing_streamline_faithful(
-        coordsFlat,
-        alphaDeg,
-        reynolds,
-        mach,
-        ncrit,
-        maxIterations,
-        new Float64Array(bounds)
-    ) as DividingStreamlineResult;
-}
-
 /**
  * Stream function grid result from WASM.
  */