Added /thinking slash command to toggle thinking blocks visibility in OpenTUI. (#4424)

Co-authored-by: opencode-agent[bot] <opencode-agent[bot]@users.noreply.github.com>
Co-authored-by: rekram1-node <rekram1-node@users.noreply.github.com>
Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/opencode/src/cli/cmd/tui/component/prompt/autocomplete.tsx

@@ -245,6 +245,11 @@ export function Autocomplete(props: {
           description: "jump to message",
           onSelect: () => command.trigger("session.timeline"),
         },
+        {
+          display: "/thinking",
+          description: "toggle thinking blocks",
+          onSelect: () => command.trigger("session.toggle.thinking"),
+        },
       )
       if (sync.data.config.share !== "disabled") {
         results.push({