Sync factory effective distance and railroad max length and add railroad ghost for factories (#4079)

> **Before opening a PR:** discuss new features on
[Discord](https://discord.gg/K9zernJB5z) first, and file bugs or small
improvements as
[issues](https://github.com/openfrontio/OpenFrontIO/issues/new/choose).
You must be assigned to an `approved` issue — unsolicited PRs will be
auto-closed.

**Add approved & assigned issue number here:**

Resolves #2668 

## Description:
Makes radius that factories effect equal to the max distance that a
railroad can be and enable factory ghosts
<img width="1920" height="1080" alt="Screenshot from 2026-06-01
20-13-58"
src="https://github.com/user-attachments/assets/1e2f4de8-79fc-4034-b6ad-3c71255c0410"
/>


## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory

## Please put your Discord username so you can be contacted if a bug or
regression is found:

tktk1234567

src/client/render/gl/passes/RangeCirclePass.ts

@@ -70,6 +70,8 @@ export class RangeCirclePass {
     const gl = this.gl;
     gl.useProgram(this.program);
     gl.uniformMatrix3fv(this.uCamera, false, cameraMatrix);
+    gl.bindVertexArray(this.vao);
+
     gl.uniform2f(this.uCenter, this.centerX, this.centerY);
     gl.uniform1f(this.uRadius, this.radius);
     if (this.warning) {
@@ -77,8 +79,6 @@ export class RangeCirclePass {
     } else {
       gl.uniform3f(this.uColor, 1.0, 1.0, 1.0);
     }
-
-    gl.bindVertexArray(this.vao);
     gl.drawArrays(gl.TRIANGLES, 0, 6);
   }
 

src/core/configuration/Config.ts

@@ -246,10 +246,10 @@ export class Config {
     return 15;
   }
   trainStationMaxRange(): number {
-    return 100;
+    return 110;
   }
   railroadMaxSize(): number {
-    return 120;
+    return this.trainStationMaxRange();
   }
 
   tradeShipGold(dist: number, player: Player | PlayerView): Gold {

src/core/game/RailNetworkImpl.ts

@@ -238,9 +238,7 @@ export class RailNetworkImpl implements RailNetwork {
   }
 
   computeGhostRailPaths(unitType: UnitType, tile: TileRef): TileRef[][] {
-    // Factories already show their radius, so we'll exclude from ghost rails
-    // in order not to clutter the interface too much.
-    if (![UnitType.City, UnitType.Port].includes(unitType)) {
+    if (![UnitType.City, UnitType.Port, UnitType.Factory].includes(unitType)) {
       return [];
     }