fix(hexclave): rename leftover @stackframe/stack-shared imports in template providers (#1525)

## Why the build fails on `origin/dev`

The `Lint & build` workflow fails at the **Build** step, in
`@hexclave/lovable-react-18-example`'s `vite build`:

```
[vite]: Rollup failed to resolve import "@stackframe/stack-shared/dist/utils/globals"
from ".../packages/react/dist/esm/providers/stack-context.js".
```

(failing run: [job
78596906597](https://github.com/hexclave/stack-auth/actions/runs/26665187298/job/78596906597))

### Root cause

PR 3 (`feat(hexclave): PR 3 — native @hexclave/* source rename + delete
dual-publish wiring`, #1482) renamed `@stackframe/stack-shared` →
`@hexclave/shared` and **deleted the dual-publish wiring**, so
`@stackframe/stack-shared` is no longer a resolvable package.

Two `packages/template/src` provider files were missed in that rename:

- `packages/template/src/providers/stack-context.tsx`
- `packages/template/src/providers/translation-provider-client.tsx`

`packages/react` ships only `package.json`; its `src`/`dist` are
**generated** from `packages/template/src` by `generate-sdks`, which
copies import specifiers verbatim. So the stale
`@stackframe/stack-shared` import propagated into `packages/react/dist`.

The `@hexclave/react` build itself **succeeds** because tsdown/rolldown
externalizes the import (it never has to resolve it). The failure only
surfaces downstream, when `lovable-react-18-example` bundles
`@hexclave/react` with Vite/Rollup and tries to actually resolve
`@stackframe/stack-shared` — a package that no longer exists.

## Fix

Point both imports at the renamed package, matching the convention
already used by sibling files (e.g. `stack-provider-client.tsx`,
`common.ts`):

```diff
-import { createGlobal } from "@stackframe/stack-shared/dist/utils/globals";
+import { createGlobal } from "@hexclave/shared/dist/utils/globals";
```

## Verification

Reproduced and confirmed the fix locally:

1. Edited the two template files.
2. `pnpm -w run generate-sdks` → generated `packages/react/src` now
imports `@hexclave/shared/dist/utils/globals`.
3. `pnpm --filter @hexclave/react run build` →
`dist/esm/providers/stack-context.js` now imports `@hexclave/shared` ✔
4. `pnpm --filter @hexclave/lovable-react-18-example run build` → **`✓
built`** (previously failed at this exact step).


<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Rename leftover imports from `@stackframe/stack-shared` to
`@hexclave/shared` in the template providers to fix downstream build
failures. This unblocks Vite/Rollup consumers (e.g.,
`@hexclave/lovable-react-18-example`) by resolving `createGlobal` from
the correct package.

<sup>Written for commit 15901edb2b.
Summary will update on new commits.</sup>

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
  * Updated internal module dependencies across provider configurations.

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packages/template/src/providers/stack-context.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import React from "react";
-import { createGlobal } from "@stackframe/stack-shared/dist/utils/globals";
+import { createGlobal } from "@hexclave/shared/dist/utils/globals";
 import type { StackClientApp } from "../lib/stack-app/apps/interfaces/client-app";
 
 type StackContextValue = {

packages/template/src/providers/translation-provider-client.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import React from "react";
-import { createGlobal } from "@stackframe/stack-shared/dist/utils/globals";
+import { createGlobal } from "@hexclave/shared/dist/utils/globals";
 
 type TranslationContextValue = {
   quetzalKeys: Map<string, string>,