Feat: vis.js Layout-Switcher im XSL-Abhängigkeitsgraph (v1.2.0)

Layout-Umschaltung zwischen barnesHut, ForceAtlas2, Repulsion und hierarchischem
Layout mit konfigurierbaren Parametern pro Layout. Einstellungen werden persistent
in AppSettings gespeichert und beim Öffnen des Dialogs wiederhergestellt.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/conf.py

@@ -80,6 +80,65 @@ class XsltVersion(str, Enum):
     XSLT_2_0_3_0 = "2.0/3.0"  # s9api (XSLT 2.0 und 3.0)
 
 
+class GraphLayout(str, Enum):
+    """vis.js Physics-Solver / Layout-Modus."""
+
+    BARNES_HUT = "barnesHut"
+    FORCE_ATLAS2 = "forceAtlas2Based"
+    REPULSION = "repulsion"
+    HIERARCHICAL = "hierarchical"
+
+
+class HierarchicalDirection(str, Enum):
+    """Richtung für hierarchisches Layout."""
+
+    UD = "UD"
+    DU = "DU"
+    LR = "LR"
+    RL = "RL"
+
+
+class HierarchicalSortMethod(str, Enum):
+    """Sortiermethode für hierarchisches Layout."""
+
+    HUBSIZE = "hubsize"
+    DIRECTED = "directed"
+
+
+class GraphLayoutSettings(BaseModel):
+    """Persistierte vis.js Layout-Einstellungen für den XSL-Abhängigkeitsgraph."""
+
+    layout: GraphLayout = GraphLayout.BARNES_HUT
+
+    # barnesHut
+    bh_gravitational_constant: int = -3000
+    bh_central_gravity: float = 0.3
+    bh_spring_length: int = 150
+    bh_spring_constant: float = 0.04
+    bh_damping: float = 0.09
+
+    # forceAtlas2Based
+    fa_gravitational_constant: int = -50
+    fa_central_gravity: float = 0.01
+    fa_spring_length: int = 100
+    fa_spring_constant: float = 0.08
+    fa_damping: float = 0.4
+
+    # repulsion
+    re_node_distance: int = 120
+    re_central_gravity: float = 0.0
+    re_spring_length: int = 200
+    re_spring_constant: float = 0.05
+    re_damping: float = 0.09
+
+    # hierarchical
+    hi_direction: HierarchicalDirection = HierarchicalDirection.UD
+    hi_sort_method: HierarchicalSortMethod = HierarchicalSortMethod.HUBSIZE
+    hi_level_separation: int = 150
+    hi_node_spacing: int = 100
+    hi_tree_spacing: int = 200
+
+
 class PostgreSqlDb(BaseModel):
     id: int
     name: str
@@ -147,6 +206,7 @@ class AppSettings(BaseSettings):
     window_geometry: tuple[int, int, int, int] | None = None  # (x, y, width, height)
     splitter_sizes: list[int] | None = None  # Splitter-Positionen
     tree_column_widths: list[int] | None = None  # TreeWidget-Spaltenbreiten
+    graph_layout_settings: GraphLayoutSettings = Field(default_factory=GraphLayoutSettings)
 
     model_config = SettingsConfigDict(json_file=config_path)