feat(lsp): resolve symbols across workspace files

Assisted-by: GLM 5.3 Flash

lsp/protocol.go

@@ -309,6 +309,56 @@ type ServerCapabilities struct {
 	DiagnosticProvider         map[string]any `json:"diagnosticProvider,omitempty"`
 	DocumentLinkProvider       map[string]any `json:"documentLinkProvider,omitempty"`
 	FoldingRangeProvider       bool           `json:"foldingRangeProvider,omitempty"`
+	Workspace                  map[string]any `json:"workspace,omitempty"`
+}
+
+// --- workspace ----------------------------------------------------------------
+
+// initializeParams carries the workspace roots the client announces.
+type initializeParams struct {
+	RootURI          string            `json:"rootUri"`
+	WorkspaceFolders []workspaceFolder `json:"workspaceFolders"`
+}
+
+// workspaceFolder is one root folder the client opened.
+type workspaceFolder struct {
+	URI  string `json:"uri"`
+	Name string `json:"name"`
+}
+
+// roots returns the workspace roots as filesystem paths: the workspace
+// folders when the client sends them, else the root URI.
+func (p initializeParams) roots() []string {
+	var out []string
+	for _, f := range p.WorkspaceFolders {
+		if path := uriPath(f.URI); path != "" {
+			out = append(out, path)
+		}
+	}
+	if len(out) == 0 && p.RootURI != "" {
+		if path := uriPath(p.RootURI); path != "" {
+			out = append(out, path)
+		}
+	}
+	return out
+}
+
+// didChangeWatchedFilesParams announces on-disk changes the client watched.
+type didChangeWatchedFilesParams struct {
+	Changes []fileEvent `json:"changes"`
+}
+
+// File change types (LSP FileChangeType).
+const (
+	fileCreated = 1
+	fileChanged = 2
+	fileDeleted = 3
+)
+
+// fileEvent is one created, changed or deleted file.
+type fileEvent struct {
+	URI  string `json:"uri"`
+	Type int    `json:"type"`
 }
 
 // --- pull diagnostics ---------------------------------------------------------