Tune nav arrow theming and toolbar spacing

app/gui/theme.py

@@ -53,6 +53,10 @@ class ThemeMixin:
         if callable(button_refresher):
             button_refresher()
 
+        nav_refresher = getattr(self, "_refresh_navigation_buttons_theme", None)
+        if callable(nav_refresher):
+            nav_refresher()
+
         status_refresher = getattr(self, "_refresh_status_palette", None)
         if callable(status_refresher) and hasattr(self, "status"):
             status_refresher(status_fg)

app/gui/ui.py

@@ -27,6 +27,7 @@ class UIBuilderMixin:
             ("🌓 Theme umschalten", self.toggle_theme),
         ]
         self._toolbar_buttons: list[dict[str, object]] = []
+        self._nav_buttons: list[tk.Button] = []
 
         buttons_frame = ttk.Frame(toolbar)
         buttons_frame.pack(side=tk.LEFT)
@@ -326,9 +327,10 @@ class UIBuilderMixin:
         return canvas.create_polygon(points, smooth=True, splinesteps=24, **kwargs)
 
     def _create_navigation_button(self, container, symbol: str, command, *, column: int) -> None:
-        bg = self.root.cget("bg") if hasattr(self.root, "cget") else "#f2f2f7"
+        palette = self._navigation_palette()
+        bg = palette["bg"]
+        fg = palette["fg"]
         container.grid_rowconfigure(0, weight=1)
-        fg = "#f5f5f5" if getattr(self, "theme", "light") == "dark" else "#1f1f1f"
         btn = tk.Button(
             container,
             text=symbol,
@@ -345,6 +347,7 @@ class UIBuilderMixin:
             width=2,
         )
         btn.grid(row=0, column=column, sticky="ns", padx=6)
+        self._nav_buttons.append(btn)
 
     def _create_titlebar(self) -> None:
         bar_bg = "#1f1f1f"
@@ -443,6 +446,12 @@ class UIBuilderMixin:
             "text": "#1f1f1f",
         }
 
+    def _navigation_palette(self) -> dict[str, str]:
+        is_dark = getattr(self, "theme", "light") == "dark"
+        if is_dark:
+            return {"bg": "#26262a", "fg": "#f5f5f5"}
+        return {"bg": "#e8e8ee", "fg": "#1f1f1f"}
+
     def _refresh_toolbar_buttons_theme(self) -> None:
         if not getattr(self, "_toolbar_buttons", None):
             return
@@ -457,6 +466,18 @@ class UIBuilderMixin:
             canvas.itemconfigure(rect_id, fill=palette["normal"], outline=palette["outline"])
             canvas.itemconfigure(text_id, fill=palette["text"])
 
+    def _refresh_navigation_buttons_theme(self) -> None:
+        if not getattr(self, "_nav_buttons", None):
+            return
+        palette = self._navigation_palette()
+        for btn in self._nav_buttons:
+            btn.configure(
+                background=palette["bg"],
+                activebackground=palette["bg"],
+                fg=palette["fg"],
+                activeforeground=palette["fg"],
+            )
+
     def _refresh_status_palette(self, fg: str) -> None:
         self.status.configure(foreground=fg)
         self._status_palette["fg"] = fg