Add fractal visualization feature

Introduce a new Fractal visualization: adds FractalComponent (template, styles, TS), FractalService (rendering, palettes, Mandelbrot/Julia/Burning Ship/Newton implementations), and Fractal model/types. Wire up routing and router constants (route and component import), add wiki links to UrlConstants, and expose the new algorithm in AlgorithmsService. Also add i18n entries (en/de) for UI labels and explanations. Component supports canvas zoom/drag, color schemes and iteration controls.

src/app/constants/RouterConstants.ts

@@ -6,6 +6,7 @@ import {PathfindingComponent} from '../pages/algorithms/pathfinding/pathfinding.
 import {SortingComponent} from '../pages/algorithms/sorting/sorting.component';
 import {ConwayGolComponent} from '../pages/algorithms/conway-gol/conway-gol.component';
 import {LabyrinthComponent} from '../pages/algorithms/pathfinding/labyrinth/labyrinth.component';
+import {FractalComponent} from '../pages/algorithms/fractal/fractal.component';
 
 export class RouterConstants {
 
@@ -51,6 +52,12 @@ export class RouterConstants {
     COMPONENT: LabyrinthComponent
   };
 
+  static readonly FRACTAL = {
+    PATH: 'algorithms/fractal',
+    LINK: '/algorithms/fractal',
+    COMPONENT: FractalComponent
+  };
+
   static readonly IMPRINT = {
     PATH: 'imprint',
     LINK: '/imprint',

src/app/constants/UrlConstants.ts

@@ -10,4 +10,8 @@
   static readonly CONWAYS_WIKI = 'https://de.wikipedia.org/wiki/Conways_Spiel_des_Lebens'
   static readonly PRIMS_WIKI = 'https://de.wikipedia.org/wiki/Algorithmus_von_Prim'
   static readonly KRUSKAL_WIKI = 'https://de.wikipedia.org/wiki/Algorithmus_von_Kruskal'
+  static readonly MANDELBROT_WIKI = 'https://de.wikipedia.org/wiki/Mandelbrot-Menge'
+  static readonly JULIA_WIKI = 'https://de.wikipedia.org/wiki/Julia-Menge'
+  static readonly NEWTON_FRACTAL_WIKI = 'https://de.wikipedia.org/wiki/Newtonfraktal'
+  static readonly BURNING_SHIP_WIKI = 'https://de.wikipedia.org/wiki/Burning_ship_(Fraktal)'
 }