fix: Fixed configuring the entry point component

[krishna9358]

Summary

When configuring the Entry Point component in the workflow builder, users could not set default values for runtime inputs. The "Runtime Data" input field in the sidebar:
Displayed a plain text input that expected a string, but the underlying schema required a JSON object (z.record(z.string(), z.unknown())), causing validation errors like:
Workflow validation failed: [entry-point-...] inputOverrides: Component input validation failed: expected: "record", code: "invalid_type", path: ["__runtimeData"], message: "Invalid input: expected record, received"
Default values were ignored when clicking "Run" - the Run Workflow dialog always opened with empty fields, requiring users to re-enter values every time.

Solution

1. Improved UI for Runtime Data input (ConfigPanel.tsx)

• For the Entry Point component, replaced the generic text input with dynamic fields that match each defined runtime input
• Each runtime input now has its own labeled field with proper type handling (text, number, json)
• Values are stored as a properly structured object in inputOverrides.__runtimeData
• Shows helpful guidance when no runtime inputs are configured

2. Pre-populate Run Dialog with defaults (useWorkflowRunner.tsx, WorkflowBuilder.tsx)

• Added resolveRuntimeInputDefaults() function to extract default values from the Entry Point node's configuration
• Run Workflow dialog now opens pre-filled with the default values set in the sidebar
• Users can modify or accept defaults before running

Before/After
Before: Single text field → validation error → Run dialog always empty
After: Individual fields per runtime input → proper object storage → Run dialog pre-populated with defaults

Testing

• bun run test
• bun run lint
• bun run typecheck
• Additional notes:

Documentation

• Updated the relevant doc(s) (see docs/guide.md) or checked that no updates are needed.
• Recorded contract/architecture changes in both public docs and .ai logs when applicable.

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