fix(docs): catch remaining dev references missed in rename

- testing-local-changes.mdx: two inline command examples
- troubleshooting.mdx: anchor link #dev → #preview, "dev server" → "preview server"
- cli.mdx: "dev server" → "preview server"

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/contributing/testing-local-changes.mdx

@@ -58,7 +58,7 @@ If you don't want to touch your global `$PATH`, add a shell alias or call `node`
 alias hyperframes="node /path/to/hyperframes-oss/packages/cli/dist/cli.js"
 
 # Or invoke directly
-node /path/to/hyperframes-oss/packages/cli/dist/cli.js dev .
+node /path/to/hyperframes-oss/packages/cli/dist/cli.js preview .
 ```
 
 Replace `/path/to/hyperframes-oss` with your actual monorepo path.
@@ -76,7 +76,7 @@ npm pack
 mkdir /tmp/pack-test && cd /tmp/pack-test
 npx /path/to/hyperframes-oss/packages/cli/hyperframes-<version>.tgz init my-video
 cd my-video
-npx /path/to/hyperframes-oss/packages/cli/hyperframes-<version>.tgz dev .
+npx /path/to/hyperframes-oss/packages/cli/hyperframes-<version>.tgz preview .
 ```
 
 ## Testing the fix branches

docs/guides/troubleshooting.mdx

@@ -61,11 +61,11 @@ If your issue is about a specific coding mistake (animations not working, video
   </Accordion>
 
   <Accordion title="Preview not updating">
-    Make sure you are editing the `index.html` in the project directory. The [preview server](/packages/cli#dev) watches for file changes and auto-reloads.
+    Make sure you are editing the `index.html` in the project directory. The [preview server](/packages/cli#preview) watches for file changes and auto-reloads.
 
     If changes still do not appear:
 
-    1. Check the terminal for errors from the dev server
+    1. Check the terminal for errors from the preview server
     2. Stop and restart `npx hyperframes preview`
     3. Hard-refresh the browser: **Ctrl+Shift+R** (Windows/Linux) or **Cmd+Shift+R** (macOS)
     4. Clear the browser cache if CSS changes are not reflected

docs/packages/cli.mdx

@@ -243,7 +243,7 @@ This is suppressed in CI environments, non-TTY shells, and when `HYPERFRAMES_NO_
 
     Opens your composition in the Hyperframes Studio with live preview. Edits to `index.html` and any referenced sub-compositions are reflected automatically. The preview uses the same Hyperframes runtime as production rendering, so what you see is what you get.
 
-    The dev server runs in three modes, auto-detected:
+    The preview server runs in three modes, auto-detected:
 
     1. **Embedded mode** (default for `npx`) — runs a standalone server with the studio bundled in the CLI. Zero extra dependencies.
     2. **Local studio mode** — if `@hyperframes/studio` is installed in your project's `node_modules`, spawns Vite with full HMR for faster iteration.