feat(core): implement cordis configuration extension and migrate all plugins

backend/core/config.go

@@ -5,6 +5,7 @@ package core
 
 import (
 	"fmt"
+	"strings"
 
 	"Wavelet/core/extpoints"
 )
@@ -29,3 +30,71 @@ func ConfigGet[T any](view extpoints.ConfigView, key string) (T, error) {
 	}
 	return value, nil
 }
+
+// MapSource implements ConfigSource backed by an in-memory map, ideal for unit tests.
+type MapSource struct {
+	values map[string]any
+	env    map[string]string
+}
+
+// NewMapSource creates a new MapSource with the provided key-value mappings.
+func NewMapSource(values map[string]any) *MapSource {
+	vals := make(map[string]any, len(values))
+	for k, v := range values {
+		vals[k] = v
+	}
+	return &MapSource{
+		values: vals,
+		env:    make(map[string]string),
+	}
+}
+
+// Lookup returns the value at the given path, supporting both flat keys and nested maps.
+func (m *MapSource) Lookup(path string) (any, bool) {
+	if m == nil || m.values == nil {
+		return nil, false
+	}
+	if v, ok := m.values[path]; ok {
+		return v, true
+	}
+	parts := strings.Split(path, ".")
+	var cur any = m.values
+	for _, part := range parts {
+		mCur, ok := cur.(map[string]any)
+		if !ok {
+			return nil, false
+		}
+		cur, ok = mCur[part]
+		if !ok {
+			return nil, false
+		}
+	}
+	return cur, true
+}
+
+// LookupEnv returns the environment variable value.
+func (m *MapSource) LookupEnv(name string) (string, bool) {
+	if m == nil || m.env == nil {
+		return "", false
+	}
+	v, ok := m.env[name]
+	return v, ok
+}
+
+// SetEnv sets an environment variable for testing.
+func (m *MapSource) SetEnv(name, value string) {
+	if m.env == nil {
+		m.env = make(map[string]string)
+	}
+	m.env[name] = value
+}
+
+// Describe describes the MapSource.
+func (m *MapSource) Describe() string {
+	return "<map source>"
+}
+
+// WithConfigValues returns an AppOption that installs a MapSource with the given key-value mappings.
+func WithConfigValues(values map[string]any) AppOption {
+	return WithConfigSource(NewMapSource(values))
+}