feat(lsp): quick fixes for the textflag include and the argument area

Assisted-by: GLM 5.3 Flash

docs/ARCHITECTURE.md

@@ -254,7 +254,10 @@ document store, republishes diagnostics on every change, and provides:
 - **assists**: document formatting through the `format` package, inlay hints
   (the frame size after the TEXT argument area), signature help (the callee's
   `// func` signature while the cursor is on a `CALL`), and code actions
-  offering quick fixes for the `missing-ret` and `unused-label` diagnostics.
+  offering quick fixes for the `missing-ret` and `unused-label` diagnostics,
+  the `missing-textflag-include` warning (the include after the last one in
+  the file) and the `abi-argsize` warning (the argument area set to the size
+  the `// func` signature implies).
 - **document information**: pull diagnostics (`textDocument/diagnostic`),
   #include document links (resolved against the document directory, then
   `$GOROOT/pkg/include`) and folding ranges (one collapsible region per

docs/CLI.md

@@ -458,7 +458,10 @@ function bodies. Definition, references and rename work across every open
 document and the wider workspace on disk: the server indexes the `.s` files
 under the workspace root that the editor has never opened, an open buffer
 always shadows its disk copy, and watched-file events together with a
-per-query freshness check keep the index current.
+per-query freshness check keep the index current. The quick fixes add the
+missing `#include "textflag.h"`, set the TEXT argument area to the size the
+`// func` signature implies, add a missing `RET`, and remove an unused
+label.
 
 ## version