feat: add configurable slug for entities

[ashrafchowdury]

PR Description

Adds slug display/edit/regenerate support across entity creation and prompt creation flows.

This introduces a reusable slug utility flow that generates a human-readable slug from the entity name with a cryptographically random 4-character alphanumeric suffix.

Included changes:

• Added shared slug utilities in @agenta/shared.
• Added slug display/edit/regenerate UI to entity commit modals for create/save-as-new flows.
• Added slug display/edit/regenerate UI to the Create New Prompt modal.

QA Requirements

1. Create New Prompt modal

• Open Create New Prompt.
• Type a valid prompt name.
• Confirm slug appears below the name field in display mode.
• Confirm slug format is <slugified-name>-<4 alphanumeric chars>.
• Click Edit.
• Click regenerate.
• Confirm only the suffix changes.
• Change the slug

2. Entity commit modal create/save-as-new flows

• Open a committable entity modal where slug UI should appear.
• Confirm slug displays
• Confirm Edit opens the full slug input.
• Confirm name edits preserve the existing suffix.
• Confirm that regenerate changes the suffix manually.
• Confirm invalid slug blocks save/create.
• Confirm commit-as-existing/new-version flows that should not show slug UI still do not show it.

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Project	Deployment	Actions	Updated (UTC)
agenta-documentation	Ready	Preview, Comment	Apr 21, 2026 1:04pm

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Status	Destroyed (PR closed)

Updated at 2026-04-22T09:06:22.541Z