chore: rename "Developer mode" to "Expert mode" in UI

[lklimek]

Summary

• Renamed the "Developer mode" checkbox label to "Expert mode" in network settings
• Shortened the left panel badge from "🔧 Expert Mode" to "🔧 Expert" to fit column width
• Added hover tooltips to both the left panel badge and the network chooser checkbox

Test plan

• Toggle the checkbox in network settings — verify it reads "Expert mode"
• Hover over the checkbox — verify tooltip "Show advanced options for power users and developers"
• Enable expert mode — verify the left panel badge shows "🔧 Expert"
• Hover over the left panel badge — verify tooltip "Expert mode is enabled — shows advanced options"

_{🤖 Co-authored by Claudius the Magnificent AI Agent}

Summary by CodeRabbit

• Style
  • Renamed "Dev Mode" label to "Expert" throughout the interface.
  • Added descriptive hover tooltips to expert mode options explaining functionality for advanced users.
  • Enhanced visual feedback with cursor changes on interactive elements.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 95bf2f00-045d-4871-8474-a5d25c70e5fd

📥 Commits

Reviewing files that changed from the base of the PR and between 676a284 and 4f5476c.

📒 Files selected for processing (2)

• src/ui/components/left_panel.rs
• src/ui/network_chooser_screen.rs

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📝 Walkthrough

Walkthrough

The changes rename "Developer mode" to "Expert mode" across two UI components, add clarifying hover tooltips to explain the feature's purpose, and improve visual spacing in the left panel.

Changes

Cohort / File(s)	Summary
Expert Mode Labeling & Hover Enhancement src/ui/components/left_panel.rs, src/ui/network_chooser_screen.rs	Renamed developer mode label to "Expert mode" with contextual hover tooltips. Updated left panel spacing from 2.0 to 5.0 and enhanced cursor feedback on hover.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A rabbit hops with glee today,
The Expert label's here to stay!
With tooltips bright and spacing true,
The interface shines, polished and new! ✨

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/rename-dev-mode-to-expert-mode

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