The user wants a single-page web app that:
1. Generates a random maze using the recursive-backtracker algorithm on a canvas
2. Animates A* or BFS solver finding the path from start to finish

I'll create a single index.html file with all CSS and JS inline. Let me design this carefully:

- Canvas-based rendering
- Recursive backtracker maze generation
- A* pathfinding with animation
- Start/end points, visual feedback
- Controls to regenerate and solve

Let me think about the maze representation:
- Grid of cells, each with walls (top, right, bottom, left)
- Recursive backtracker: DFS with backtracking, carving passages
- A* with Manhattan distance heuristic

For the animation:
- Show the solver exploring cells one by one
- Highlight the final path once found
- Use requestAnimationFrame or step-based animation

Let me write this out.

I'll create a single self-contained HTML file with a canvas-based maze generator (recursive backtracker) and an animated A* solver

The file has been written successfully. Let me verify it exists and check its size, then provide a summary to the user.

The file is ready at `/tmp/ws/index.html`. Here's what it includes: **Maze Generation — Recursive Backtracker:** - Starts at (0,0), uses a DFS stack to carve passages by removing walls between cells - Produces a perfect maze (exactly one path between any two cells) **A* Solver Animation:** - Uses Manhattan distance heuristic with a priority queue (Map-based) - Explores cells in batches — the batch size is tied to the FPS slider so you can watch the search spread in real time - Explored cells are highlighted in yellow, the final solution path in green - Start (S) is green, End (E) is red **Controls:** | Button | Action | |---|---| | **Generate Maze** | Re-runs the recursive-backtracker algorithm | | **Solve (A*)** | Animates A* from top-left to bottom-right | | **Clear Path** | Removes the solution/explored overlay | | **Speed slider** | Controls animation speed (1–60 fps) | The entire app is self-contained — no external dependencies, no network requests, and runs fully sandboxed in the browser.