fix: clean up sidebar component and improve ANSI width handling

[cnjack]

Summary by CodeRabbit

Release Notes

• Bug Fixes

  • Fixed notification handler payload processing to correctly enqueue received commands.
  • Improved paste reference expansion to correctly handle all stored paste IDs.

• Refactor

  • Enhanced terminal text rendering with Unicode Core mode support for better width calculations.
  • Simplified sidebar truncation and alignment logic.
  • Removed unused UI components and styling.

• Style

  • Updated chat message assistant label to use component-default styling instead of forced monospace font.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ac82ec11-6258-41b5-b334-ac1cde7d27c7

📥 Commits

Reviewing files that changed from the base of the PR and between bda77f2 and 58342e1.

📒 Files selected for processing (8)

• go.mod
• internal/channel/ble/ble_cgo.go
• internal/tui/input_views.go
• internal/tui/paste_store.go
• internal/tui/sidebar_component.go
• internal/tui/styles.go
• internal/tui/tui.go
• web/src/components/ChatMessage.vue

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📝 Walkthrough

Walkthrough

The PR refactors terminal text handling to enable BubbleTea's Unicode Core mode for improved width calculations, simplifies string truncation logic, removes unused TUI style definitions, cleans up handler implementations, and adjusts viewport alignment. The go-runewidth dependency moves to indirect.

Changes

Cohort / File(s)	Summary
Dependency Management go.mod	Moved go-runewidth from direct to indirect dependency without version change.
TUI Unicode & Truncation internal/tui/sidebar_component.go, internal/tui/tui.go	Enabled Unicode Core mode in Model.Init; simplified truncation by delegating to ansi.Truncate instead of manual rune width calculations; adjusted viewport-sidebar join logic to use ansi.StringWidth with right-padding.
TUI Styling Cleanup internal/tui/input_views.go, internal/tui/styles.go	Removed renderTodoBar() method and 7 unused style variables (landingLogoStyle, landingUnderlineStyle, landingTaglineStyle, sidebarStyle, sidebarItemStyle, titleStyle, todoLabelStyle).
Logic & Handler Updates internal/tui/paste_store.go, internal/channel/ble/ble_cgo.go	Changed ExpandRefs to unconditionally attempt simple reference replacement; updated BLE notification handler to use ReceivedCommand(cmd) constructor.
Web UI web/src/components/ChatMessage.vue	Removed inline monospace font style from assistant role label.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 With Unicode Core now guiding the way,
We've trimmed the styles and shortened the day!
Rune-width hops indirectly along,
While ansi.Truncate sings a cleaner song. ✨

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/tui-render-issue

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