WIP: Staged all changes

backend/src/dependencies.py

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+# [DEF:Dependencies:Module]
+# @SEMANTICS: dependency, injection, singleton, factory
+# @PURPOSE: Manages the creation and provision of shared application dependencies, such as the PluginLoader and TaskManager, to avoid circular imports.
+# @LAYER: Core
+# @RELATION: Used by the main app and API routers to get access to shared instances.
+
+from pathlib import Path
+from .core.plugin_loader import PluginLoader
+from .core.task_manager import TaskManager
+
+# Initialize singletons
+# Use absolute path relative to this file to ensure plugins are found regardless of CWD
+plugin_dir = Path(__file__).parent / "plugins"
+plugin_loader = PluginLoader(plugin_dir=str(plugin_dir))
+task_manager = TaskManager(plugin_loader)
+
+def get_plugin_loader() -> PluginLoader:
+    """Dependency injector for the PluginLoader."""
+    return plugin_loader
+
+def get_task_manager() -> TaskManager:
+    """Dependency injector for the TaskManager."""
+    return task_manager
+# [/DEF]