feat: Add real-time tool activity display under agent badges

[gustafeden]

Summary

Displays real-time tool activity under each sub-agent badge in the running agents bar, showing what each agent is currently doing.

Features

• Task name with typing animation - 30ms per character, persists across tab switches
• Tool invocation log - Up to 3 lines of recent tool calls
• MCP tool name translation - Friendly labels (e.g., mcp__vide-agent__spawnAgent → Spawn)
• Smart param extraction - Shows relevant params (query, file_path, command, etc.)
• Dynamic width scaling - Adjusts based on agent count (2 agents=45 chars, 6+=22 chars)
• Noisy tool filtering - Hides TodoWrite, setTaskName, etc.

Behavior

• Only shows for sub-agents (not main agent)
• Only shows when agent is actively working (not idle)
• Most recent tool prefixed with ↳, older tools with space

Files Changed

• lib/modules/agent_network/components/running_agents_bar.dart (+245/-50)

Notes

• Reconstructed from cleaned codebase; no cherry-picking
• Original mixed commits were not cleanly isolatable
• Single file change, minimal and reviewable

Test Plan

• Verify tool logs appear under sub-agent badges
• Verify task names animate character by character
• Verify MCP tool names are translated to friendly labels
• Verify logs disappear when agent becomes idle
• Verify width scales appropriately with multiple agents

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