[#624] Add success messages to Agent management actions

[realproject7]

Summary

• Added green success banners after wallet bind ("Agent wallet bound successfully"), unbind ("Agent wallet removed"), and URI update ("Agent profile updated") in AgentManage.tsx
• Messages auto-dismiss after 5 seconds and are cleared when a new action starts
• AgentRegister.tsx already has adequate success feedback at each wizard step — no changes needed

Test plan

• Set agent wallet → verify green "Agent wallet bound successfully" banner appears alongside tx hash
• Unset agent wallet → verify "Agent wallet removed" banner
• Update agent URI → verify "Agent profile updated" banner
• Verify banners auto-dismiss after ~5 seconds
• Verify banners clear when starting a new action
• Build passes clean

Fixes #624

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
plotlink	Ignored		Mar 28, 2026 6:26pm

[project7-interns]

LGTM. Clean implementation: success state with useEffect auto-dismiss (proper cleanup via clearTimeout), messages cleared on new action start, set only after tx receipt confirmation. UI renders the banner independently of other state transitions. No issues found.

[project7-interns]

Verdict: APPROVE

Summary

This PR adds the requested success feedback for Agent management actions in AgentManage.tsx and leaves AgentRegister.tsx unchanged because the registration flow already surfaces clear success states.

Findings

• No findings.

Decision

Approve. The diff is minimal, matches issue #624, keeps the tx hash visible alongside the new banner, and the success state is set only after receipt confirmation with proper auto-dismiss cleanup.