use Rich table for agents list output

[ayaan-kapoor]

What

Replace the tab-separated output in gumloop agents list with a proper Rich table.

Why

The current output is hard to read when agent names or IDs are long — columns don't align and there's no visual separation. Rich is already a dependency and used throughout the CLI, so this is a zero-cost improvement.

Active agents now show in green, inactive ones are dimmed, making status easy to scan at a glance.

Before

ID    NAME    MODEL    TEAM    ACTIVE
agent_abc    Support Bot    auto    team_123    yes
agent_xyz    Draft Agent    gpt-4o    team_123    no

After

ID          NAME           MODEL   TEAM       ACTIVE
agent_abc   Support Bot    auto    team_123    yes
agent_xyz   Draft Agent    gpt-4o  team_123    no

(columns align, active/inactive colored)

[greptile-apps]

Greptile Summary

This PR replaces the tab-separated console.print output in gumloop agents list with a properly formatted Rich Table, aligning columns and color-coding active/inactive status.

• The Rich Table is configured with box=None and pad_edge=False to preserve the flat, shell-friendly look while gaining auto-aligned columns.
• All server-supplied fields (agent.id, agent.name, agent.model_name, agent.team_id) are correctly passed through escape_markup(), closing a minor pre-existing markup-injection gap that the old unescaped console.print had. The hardcoded [green]yes[/green] / [dim]no[/dim] strings are intentionally not escaped, which is correct since Rich table columns default to markup=True.

Confidence Score: 5/5

Safe to merge — the change is purely cosmetic output formatting with no logic, data, or API contract changes.

The only changed code is the human-readable rendering path (skipped entirely on --json). User-supplied data is consistently escaped, the hardcoded markup for active status is correct given Rich's default markup=True on table columns, and the existing pagination / error-handling paths are untouched.

No files require special attention.

Important Files Changed

Filename	Overview
src/gumloop/cli/commands/agents.py	Replaces tab-separated console.print with a Rich Table in list_agents; all user-supplied fields are correctly escape_markup'd while hardcoded markup strings for active/inactive status are intentionally left as-is.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[list_agents called] --> B{json_output?}
    B -- yes --> C[print_json and return]
    B -- no --> D{response.agents empty?}
    D -- yes --> E[print 'No agents found.']
    D -- no --> F[Build Rich Table\nbox=None, pad_edge=False]
    F --> G[Add columns:\nID dim / NAME / MODEL / TEAM dim / ACTIVE center]
    G --> H[For each agent:\nescape_markup user fields\nhardcoded markup for active status]
    H --> I[table.add_row]
    I --> J[console.print table]
    E --> K{response.next_cursor?}
    J --> K
    K -- yes --> L[print next cursor hint]
    K -- no --> M[Done]
    L --> M

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