feat(app): implement character login and destination setting for multiple characters

This commit introduces several key features:

- **Multiple Character Support**: The application can now handle multiple logged-in EVE Online characters.
- **List Characters**: A new function `ListCharacters` allows retrieving a list of all authenticated characters.
- **Set Destination for All**: The `SetDestinationForAll` function enables setting a destination for all logged-in characters simultaneously.
- **UI Updates**: The frontend has been updated to display logged-in characters and to allow setting destinations for all characters.
- **Backend Refinements**: The ESI SSO logic has been improved to support refreshing tokens for multiple characters and to handle the new multi-character functionality.
- **Dependency Updates**: Dependencies have been updated to their latest versions.

chore: update go module dependencies

app.go

@@ -97,3 +97,31 @@ func (a *App) SetDestinationByName(systemName string, clearOthers bool, addToBeg
 	}
 	return a.ssi.PostWaypoint(id, clearOthers, addToBeginning)
 }
+
+// SetDestinationForAll resolves system name to ID and applies waypoint to all logged-in characters
+func (a *App) SetDestinationForAll(systemName string, clearOthers bool, addToBeginning bool) error {
+	if a.ssi == nil {
+		return errors.New("ESI not initialised")
+	}
+	id, err := a.ssi.ResolveSystemIDByName(a.ctx, systemName)
+	if err != nil {
+		return err
+	}
+	return a.ssi.PostWaypointForAll(id, clearOthers, addToBeginning)
+}
+
+// ListCharacters returns all characters stored in the token DB
+func (a *App) ListCharacters() ([]CharacterInfo, error) {
+	if a.ssi == nil || a.ssi.db == nil {
+		return nil, errors.New("ESI not initialised")
+	}
+	var tokens []ESIToken
+	if err := a.ssi.db.Find(&tokens).Error; err != nil {
+		return nil, err
+	}
+	list := make([]CharacterInfo, 0, len(tokens))
+	for _, t := range tokens {
+		list = append(list, CharacterInfo{CharacterID: t.CharacterID, CharacterName: t.CharacterName})
+	}
+	return list, nil
+}