docs: Update documentation for 145 files

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docs/auriondocs/Code/src/EchoHub.Client/Config/ConfigManager.cs.md

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+# ConfigManager
+
+> **File:** `src/EchoHub.Client/Config/ConfigManager.cs`  
+> **Kind:** class
+
+```csharp
+public static class ConfigManager
+```
+
+
+ConfigManager provides a thread-safe, single-point API for loading and persisting the client's configuration to disk. Use Load to read the current ClientConfig and Save/SaveServer/RemoveServer to apply changes from the UI or background tasks (for example, after token refreshes or updating saved servers).
+
+## Remarks
+
+ConfigManager stores the configuration in a JSON file named config.json inside a per-user directory (.echohub) under the current user's profile. All file I/O is serialized with a private lock (FileLock) to prevent concurrent access from UI threads and background tasks. When you call SaveServer, the code locates an existing SavedServer by URL (case-insensitive) and updates it, or appends a new one if none exists; RemoveServer deletes entries by URL. The design uses best-effort error handling—exceptions are swallowed to avoid disrupting the app—but this means persistence failures are not surfaced to callers unless they implement their own checks.
+
+## Notes
+
+- Persistence operations swallow all exceptions, making failures non-fatal but potentially leading to invisible data loss.
+- SavedServers are deduplicated by URL using a case-insensitive comparison; updating an existing URL won't create a duplicate.
+- ConfigDir uses Environment.GetFolderPath(Environment.SpecialFolder.UserProfile); on systems where a user profile is unavailable or access is restricted, initialization may fall back to a default path.