feat(lsp): pull diagnostics, include links and folding ranges

Assisted-by: GLM 5.3 Flash

lsp/protocol.go

@@ -305,6 +305,46 @@ type ServerCapabilities struct {
 	SemanticTokensProvider     map[string]any `json:"semanticTokensProvider,omitempty"`
 	InlayHintProvider          bool           `json:"inlayHintProvider,omitempty"`
 	DiagnosticProvider         map[string]any `json:"diagnosticProvider,omitempty"`
+	DocumentLinkProvider       map[string]any `json:"documentLinkProvider,omitempty"`
+	FoldingRangeProvider       bool           `json:"foldingRangeProvider,omitempty"`
+}
+
+// --- pull diagnostics ---------------------------------------------------------
+
+type diagnosticParams struct {
+	TextDocument textDocumentIdentifier `json:"textDocument"`
+}
+
+// documentDiagnosticReport is the pull-diagnostics result: a full report for
+// one document.
+type documentDiagnosticReport struct {
+	Kind  string       `json:"kind"` // always "full"
+	Items []Diagnostic `json:"items"`
+}
+
+// --- document links -----------------------------------------------------------
+
+type documentLinkParams struct {
+	TextDocument textDocumentIdentifier `json:"textDocument"`
+}
+
+// DocumentLink links a #include path to the header file it resolves to.
+type DocumentLink struct {
+	Range  Range  `json:"range"`
+	Target string `json:"target"`
+}
+
+// --- folding ranges -----------------------------------------------------------
+
+type foldingRangeParams struct {
+	TextDocument textDocumentIdentifier `json:"textDocument"`
+}
+
+// FoldingRange marks a collapsible region: a TEXT function's body.
+type FoldingRange struct {
+	StartLine int    `json:"startLine"`
+	EndLine   int    `json:"endLine"`
+	Kind      string `json:"kind,omitempty"`
 }
 
 // --- code actions -------------------------------------------------------------