feat: configure minimum splash duration

src/ccma/config.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+import math
 import os
 from dataclasses import dataclass
 from pathlib import Path
@@ -18,6 +19,7 @@ class AppConfig:
     gnucash_path: str = ""
     theme_mode: str = "dark"
     run_housekeeper_on_startup: bool = True
+    splash_minimum_seconds: float = 5.0
     birthday_days_before: int = 7
     birthday_days_after: int = 2
     anniversary_days_before: int = 14
@@ -40,6 +42,7 @@ class AppConfig:
                 "gnucash_path": self.gnucash_path,
                 "theme_mode": self.theme_mode,
                 "run_housekeeper_on_startup": self.run_housekeeper_on_startup,
+                "splash_minimum_seconds": _non_negative_float(self.splash_minimum_seconds, 5.0),
                 "birthday_days_before": self.birthday_days_before,
                 "birthday_days_after": self.birthday_days_after,
                 "anniversary_days_before": self.anniversary_days_before,
@@ -96,6 +99,7 @@ def load_config() -> AppConfig:
             gnucash_path=str(data.get("gnucash_path", "")),
             theme_mode=str(data.get("theme_mode", "dark")),
             run_housekeeper_on_startup=bool(data.get("run_housekeeper_on_startup", True)),
+            splash_minimum_seconds=_non_negative_float(data.get("splash_minimum_seconds", 5.0), 5.0),
             birthday_days_before=int(data.get("birthday_days_before", 7)),
             birthday_days_after=int(data.get("birthday_days_after", 2)),
             anniversary_days_before=int(data.get("anniversary_days_before", 14)),
@@ -113,3 +117,11 @@ def _legacy_config_directory() -> Path:
     if os.name == "nt":
         return Path(os.environ.get("APPDATA", Path.home())) / "C3MA"
     return Path(os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config")) / "c3ma"
+
+
+def _non_negative_float(value: object, default: float) -> float:
+    try:
+        parsed = float(value)
+    except (TypeError, ValueError):
+        return default
+    return max(0.0, parsed) if math.isfinite(parsed) else default