xuang7 opened a new issue, #7519:
URL: https://github.com/apache/texera/issues/7519
### Feature Summary
Step 1 of the operator-demo video generator: the shared Playwright
automation foundation.
### Proposed Solution or Design
Add a new `Docs` sbt module with Playwright (Chromium) as a dependency. This
module provides the shared framework that later operator-demo controllers and
generated scripts will build on.
The module includes:
- `ControllerContext` and shared base types: define `ControllerContext`
together with the common step, controller, and builder abstractions used by
later UI controllers.
- Shared Playwright utilities: add reusable helpers for common browser
interactions, including cursor-visible clicks, optional press-and-hold behavior
for controls that do not reliably respond to instantaneous clicks, dropdown
selection, explicit waits, and canvas geometry helpers.
- `OperatorScript` interface: define the interface implemented by each
per-operator script. It includes separate `setup` and `demo` phases so
preparation work, such as creating or importing the sample workflow, runs
before recording starts and remains outside the final video.
- Shared execution constants: centralize commonly used values such as delay
tiers, timeout ceilings, retry counts, and Run button state strings.
Controllers follow a builder-style API:
```text
new SomeControllerBuilder(ctx)
.someAction(...)
.execute()
```
### Affected Area
_No response_
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