fix(ui): remove duplicate create-task loading status (#10756)

## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - Operators create tasks from the board UI.
> - The create form must show clear progress while it submits.
> - The form showed the same pending state twice.
> - One copy also used the old term "issue" instead of the UI term
"task."
> - This pull request keeps the pending state in the submit button and
removes the duplicate status.
> - The benefit is a clearer form with consistent task language.

## Linked Issues or Issue Description

No matching public GitHub issue exists for this focused UI bug.

**What happened?**

The create-task form showed `Creating issue...` beside a submit button
that already showed `Creating...`. A low-trust notice in the same form
also used the old UI term `issue`.

**Expected behavior**

The submit button shows the pending state once. Visible UI copy uses
`task` for the work object.

**Steps to reproduce**

1. Open the create-task dialog.
2. Enter a task title.
3. Select **Create Task**.
4. Observe the duplicate loading status beside the pending button.

**Paperclip version or commit**

Reproduced from upstream `master` at
`2c90cf0f2c60d3851880eca3c643c01313af9ffd`.

**Deployment mode**

Local development build.

## What Changed

- Removed the duplicate loading status beside the create-task submit
button.
- Kept inline create errors in the dialog footer.
- Changed the low-trust notice from `issue` to `task`.
- Added a regression test for the single pending-state presentation and
`aria-busy` state.

## Verification

- `cd ui && pnpm exec vitest run src/components/NewIssueDialog.test.tsx`
— 24 tests passed.
- `pnpm --filter @paperclipai/ui typecheck` — passed.
- `pnpm check:token-gates` — passed.

## Risks

- Low risk. The change only removes duplicate pending copy and updates
one UI term.
- The regression test keeps the submit button pending indefinitely to
verify its accessible loading state.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex, model ID `gpt-5`. The runtime did not expose the
context-window size. The session used reasoning, repository tools, and
code execution.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge

Co-authored-by: Paperclip <noreply@paperclip.ing>

ui/src/components/NewIssueDialog.test.tsx

@@ -797,6 +797,29 @@ describe("NewIssueDialog", () => {
     act(() => root.unmount());
   });
 
+  it("shows the create-task loading state only in the submit button", async () => {
+    mockIssuesApi.create.mockReturnValue(new Promise(() => undefined));
+    dialogState.newIssueDefaults = { title: "Pending task" };
+
+    const { root } = renderDialog(container);
+    await flush();
+
+    const submitButton = Array.from(container.querySelectorAll("button"))
+      .find((button) => button.textContent?.includes("Create Task"));
+    expect(submitButton).not.toBeUndefined();
+
+    await act(async () => {
+      submitButton!.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    });
+    await flush();
+
+    expect(submitButton?.textContent).toContain("Creating...");
+    expect(submitButton?.getAttribute("aria-busy")).toBe("true");
+    expect(container.textContent).not.toContain("Creating issue");
+
+    act(() => root.unmount());
+  });
+
   it("submits Chinese, Japanese, and Hindi issue text without normalization", async () => {
     const title = "验证中文任务";
     const description = [

ui/src/components/NewIssueDialog.tsx

@@ -2242,7 +2242,7 @@ export function NewIssueDialog() {
           >
             <ShieldAlert className="mt-0.5 h-3.5 w-3.5 shrink-0 text-amber-600 dark:text-amber-300" />
             <span className="leading-snug">
-              Low-trust review agent. It can only act inside its assigned review boundary; issue, project, or run policy defines the concrete scope.
+              Low-trust review agent. It can only act inside its assigned review boundary; task, project, or run policy defines the concrete scope.
             </span>
           </div>
         ) : null}
@@ -2259,16 +2259,11 @@ export function NewIssueDialog() {
             Discard Draft
           </Button>
           <div className="flex items-center gap-3">
-            <div className="min-h-5 text-right">
-              {createIssue.isPending ? (
-                <span className="inline-flex items-center gap-1.5 text-xs font-medium text-muted-foreground">
-                  <Loader2 className="h-3 w-3 animate-spin" />
-                  Creating issue...
-                </span>
-              ) : createIssue.isError ? (
+            {createIssue.isError ? (
+              <div className="min-h-5 text-right">
                 <span className="text-xs text-destructive">{createIssueErrorMessage}</span>
-              ) : null}
-            </div>
+              </div>
+            ) : null}
             <Button
               size="sm"
               className="min-w-(--sz-8_5rem) disabled:opacity-100"