tui: add session rename functionality with /rename command

- Add /rename command to autocomplete when a session is active
- Add rename dialog component for changing session names
- Add rename option to session list dialog with 'r' keybind
- Add session rename command to command registry

packages/opencode/src/cli/cmd/tui/component/dialog-session-list.tsx

@@ -7,6 +7,7 @@ import { Locale } from "@/util/locale"
 import { Keybind } from "@/util/keybind"
 import { useTheme } from "../context/theme"
 import { useSDK } from "../context/sdk"
+import { DialogSessionRename } from "./dialog-session-rename"
 
 export function DialogSessionList() {
   const dialog = useDialog()
@@ -74,6 +75,13 @@ export function DialogSessionList() {
             setToDelete(option.value)
           },
         },
+        {
+          keybind: Keybind.parse("r")[0],
+          title: "rename",
+          onTrigger: async (option) => {
+            dialog.replace(() => <DialogSessionRename session={option.value} />)
+          },
+        },
       ]}
     />
   )

packages/opencode/src/cli/cmd/tui/component/dialog-session-rename.tsx

@@ -0,0 +1,35 @@
+import { DialogPrompt } from "@tui/ui/dialog-prompt"
+import { useDialog } from "@tui/ui/dialog"
+import { useSync } from "@tui/context/sync"
+import { createMemo } from "solid-js"
+import { useSDK } from "../context/sdk"
+
+interface DialogSessionRenameProps {
+  session: string
+}
+
+export function DialogSessionRename(props: DialogSessionRenameProps) {
+  const dialog = useDialog()
+  const sync = useSync()
+  const sdk = useSDK()
+  const session = createMemo(() => sync.session.get(props.session))
+
+  return (
+    <DialogPrompt
+      title="Rename Session"
+      value={session()?.title}
+      onConfirm={(value) => {
+        sdk.client.session.update({
+          path: {
+            id: props.session,
+          },
+          body: {
+            title: value,
+          },
+        })
+        dialog.clear()
+      }}
+      onCancel={() => dialog.clear()}
+    />
+  )
+}

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

@@ -222,6 +222,11 @@ export function Autocomplete(props: {
           description: "unshare a session",
           onSelect: () => command.trigger("session.unshare"),
         },
+        {
+          display: "/rename",
+          description: "rename session",
+          onSelect: () => command.trigger("session.rename"),
+        },
       )
     }
     results.push(