feat: add global worker agent templates and improve agent config ui

[claytonlin1110]

Related Issue

Closes #1345
Context: Worker agents are already user-scoped (stored per user in the app and shared across all projects). This PR adds file-based global templates so you can keep a reusable library of agent configs that survives cleared app data and can be backed up or moved between machines, plus UI improvements for managing and reusing them.

Description

Feature 1: Global Worker Agent templates

• Store global templates in ~/.eigent//agent-templates.json (Electron).
• New Agents → Global Agents tab: list templates, import from JSON, export, duplicate, delete.
• When adding a Worker: Create from template dropdown and Save as global template checkbox so templates are reusable across projects.

Feature 2: Agent configuration UI

• Export / Import agent config (JSON) from the Add Worker dialog.
• Duplicate for global templates (in Global Agents) and for workers (workflow node menu).
• Larger, resizable description (system prompt) field.
• Tools overview: summary of selected tools under the tool selector.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Contribution Guidelines Acknowledgement

• I have read and agree to the Eigent Contribution Guideline

[claytonlin1110]

@Wendong-Fan @a7m-1st @Pakchoioioi Please review this PR when you have a chance.

[claytonlin1110]

@4pmtong Would you please review this?

[claytonlin1110]

Anyone can review this PR? Thanks.

[a7m-1st]

Thanks for the PR @claytonlin1110 , it seems a medium size PR. Do you mind attaching some videos or screenshots of your exact changes so that we can have an easy time to assess beforehand?

Depending on that if it's a core user flow feature, we might need to update the docs too.

Thanks for that !

[claytonlin1110]

Global Agents tab

global.mp4

Create from template and save as global template

create_from_template.mp4

Export / Import agent config (Add Worker)

export_import_agent_config.mp4

[claytonlin1110]

@a7m-1st Uploaded video.

[a7m-1st]

Awesome thanks @claytonlin1110 , I have forwarded the PR to @Pakchoioioi and @Douglasymlai to align the features and UI/UX

[Douglasymlai]

Hi @claytonlin1110 thanks for this PR. I will have a meeting with @Pakchoioioi this week go through this feature, since it's a big update to the project structure. We will get back to you ASAP.

[claytonlin1110]

@Douglasymlai @Pakchoioioi Any update?

[claytonlin1110]

@Douglasymlai Please let me know if you have any update for this. Wanna get this PR reviewed asap. Thanks.