fix(tui): preserve wrapped sidebar todo height

packages/tui/src/feature-plugins/sidebar/todo.tsx

@@ -18,7 +18,7 @@ export function SidebarTodo(props: { context: Plugin.Context; sessionID: string
 
   return (
     <Show when={list().length > 0}>
-      <box>
+      <box flexShrink={0}>
         <box
           flexDirection="row"
           gap={1}

packages/tui/test/feature-plugins/sidebar-todo.test.tsx

@@ -0,0 +1,102 @@
+/** @jsxImportSource @opentui/solid */
+import { expect, test } from "bun:test"
+import { RGBA } from "@opentui/core"
+import { testRender } from "@opentui/solid"
+import type { Context } from "@opencode/plugin/tui/context"
+import { For } from "solid-js"
+import { SidebarTodo } from "../../src/feature-plugins/sidebar/todo"
+import type { Todo } from "../../src/util/todo"
+
+function context(todos: Todo[]) {
+  const color = RGBA.fromInts(200, 200, 200)
+  return {
+    theme: { text: { base: color, muted: color, feedback: { warning: { base: color } } } },
+    storage: { store: () => [{ open: true }, async () => {}] },
+    data: {
+      session: {
+        get: () => ({}),
+        message: {
+          list: () => [
+            {
+              type: "assistant",
+              content: [{ type: "tool", name: "todowrite", state: { status: "completed", input: { todos } } }],
+            },
+          ],
+        },
+      },
+    },
+  } as unknown as Context
+}
+
+const content = [
+  "Review the sample output at several terminal widths and verify all displayed labels",
+  "Check example descriptions for wrapping and maintain consistent section spacing",
+  "Run the sample checks, inspect the terminal output, and document expected results",
+  "Prepare a sample report with before and after captures; record the verification results",
+]
+
+test("sidebar preserves wrapped todo content and spacing before a growing section", async () => {
+  const todos = content.map(
+    (content, index): Todo => ({
+      content,
+      status: index === 0 ? "in_progress" : "pending",
+    }),
+  )
+  const app = await testRender(
+    () => (
+      <box width={40} height={40} paddingLeft={2} paddingRight={2}>
+        <scrollbox
+          flexGrow={1}
+          minHeight={0}
+          horizontalScrollbarOptions={{ visible: false }}
+          verticalScrollbarOptions={{ visible: false }}
+        >
+          <box flexShrink={0} gap={1} paddingRight={1}>
+            <SidebarTodo context={context(todos)} sessionID="session" />
+            <box flexGrow={1} flexShrink={1}>
+              <box flexDirection="row">
+                <text>Next section</text>
+              </box>
+              <scrollbox flexGrow={1} flexShrink={1}>
+                <For each={Array.from({ length: 67 }, (_, index) => index)}>
+                  {(index) => (
+                    <box flexDirection="row">
+                      <text>Item {index}</text>
+                    </box>
+                  )}
+                </For>
+              </scrollbox>
+            </box>
+          </box>
+        </scrollbox>
+      </box>
+    ),
+    { width: 40, height: 40 },
+  )
+
+  try {
+    await app.renderOnce()
+    const rows = app
+      .captureCharFrame()
+      .split("\n")
+      .map((row) => row.trim())
+    const next = rows.indexOf("Next section")
+    expect(next).toBeGreaterThan(0)
+    expect(rows[next - 1]).toBe("")
+    expect(rows[next - 2]).not.toBe("")
+    expect(
+      rows
+        .slice(1, next)
+        .map((row) => row.replace(/^\[[^\]]+\]\s*/, ""))
+        .join(" ")
+        .replace(/\s+/g, ""),
+    ).toBe(
+      todos
+        .map((todo) => todo.content)
+        .join("")
+        .replace(/\s+/g, ""),
+    )
+  } finally {
+    app.renderer.destroy()
+  }
+})