Add Save Route and Load Route buttons to RouteEditingBar

[Copilot]

The route editing toolbar lacked explicit save/load controls — persisting a custom route required a confusing two-click toggle dance via "Add Default Routing", with no obvious way to reload saved routes during editing.

Changes

New SavedRoutesList component

• Renders routeEditingManager.defaultRoutings as a collapsible button list below the toolbar
• Clicking a route calls addDefaultRoutingPoint(name) to load it into the editor and dismisses the panel
• Shows "No saved routes available." when the list is empty

RouteEditingBar toolbar additions

• Save Route — directly opens the existing DefaultRoutingInput dialog (options.showDefaultRoutingInput = true) without requiring the mode toggle
• Load Route — toggles the new SavedRoutesList panel; uses download.png icon for clarity

State & config

• Added showSavedRoutesList: { default: false } to config/parameters.js; picked up automatically by Options.resetOptions() via extendObservable

Styles

• Added .saved-routes-list, .saved-route-item, .no-routes-msg to main.scss, matching the existing dark toolbar theme

Notes

• No new WebSocket messages or backend changes — reuses SaveDefaultRouting + defaultRoutings store state throughout
• Existing "Add Default Routing" toggle preserved for backward compatibility

Warning

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Original prompt

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This section details on the original issue you should resolve

<issue_title>[Feature] Add Route Editing and Saving Functionality in Routing Module</issue_title>
<issue_description>### Description

Currently, the routing interface only supports basic point selection on the map. We need a more flexible way to create, edit, and persist custom routes based on point cloud maps or HD maps.

Current Limitation

• Users can only select discrete points on the map.
• Lack of path smoothing and manual adjustment capabilities.

Proposed Features

1. Curve Generation: Automatically generate a smooth curve/path when two points are selected on the map.
2. Path Editing: Support interactive editing of the generated curves (e.g., dragging waypoints or adjusting curvature).
3. Route Persistence: Ability to save the edited route so the vehicle can follow the predefined path in subsequent sessions.

Workflow

• Load the Point Cloud/HD Map.
• Interactively plot and refine the route on the UI.
• Save and execute the planned trajectory.
  </issue_description>

<agent_instructions>### Copilot Prompt: Apollo Routing Feature Enhancement

Context: I am developing a "Route Editor" feature for the Apollo Auto routing interface. I need to move beyond simple point-to-point selection to a full curve-based editing and saving system.

Task: Please provide a technical design and implementation boilerplate for the following:

1. UI Design :

• Interaction: Implement a tool to click two points on the map and automatically generate a smooth curve (Spline or Bézier) between them.
• Editing: Add "Control Points" (drag-and-drop handles) on the curve to allow manual path adjustment.
• Toolbar: Add "Save Route", "Clear", and "Load Route" buttons to the routing sidebar.

2. API & Data Interface (Protocol Buffers/JSON):

• **Data Structure:
  ** Define a CustomRoute message that includes an array of Waypoint (x, y, z, heading) and CurveParameters.
• Storage: Design a RESTful API or gRPC service to:
• POST /routing/save: Save the edited route to a local file or database.
• GET /routing/list: Fetch saved routes.
• POST /routing/execute: Send the specific curve data to the Apollo Planning module.

3. Frontend-Backend Logic:

• Smoothing: Suggest a library or algorithm (e.g., cubic hermite spline) to ensure the UI curve aligns with Apollo's map coordinates.
• Mock Implementation: Provide a TypeScript service class to handle the state management of the edited points.

Constraints:

• Must be compatible with Apollo Dreamview's architecture.

• The output route must be convertible to Apollo's RoutingResponse format.
  </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes [Feature] Add Route Editing and Saving Functionality in Routing Module #3

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