Support longer/multiline changelog messages and fix package selection indent

[chainchad]

No description provided.

[Copilot]

Pull request overview

This PR updates the terminal UI flow for creating changesets to support longer, multi-line changelog messages, and improves the visual indentation of package rows when packages are grouped under section headers.

Changes:

• Replaced single-line textinput with multi-line textarea for changelog entry input (confirm via ctrl+d, enter inserts newline), including resize-aware sizing.
• Adjusted rendering of grouped package rows to be indented under their section header.
• Added a test to validate multi-line summary entry and confirmation behavior.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
internal/tui/tui.go	Switch summary input to textarea, add dynamic height/width behavior, update confirmation key, and indent grouped package rows.
internal/tui/tui_test.go	Adds coverage for multi-line summary input and ctrl+d confirmation.
.changeset/bright-clams-fly.md	Records the user-facing change in the release notes.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (2)

internal/tui/tui.go:431

• Same return-evaluation-order issue here: return m, m.textArea.Focus() can drop the focus state change from the returned model if Focus() mutates the textarea model.

					m.assignRemainingAsPatch()
					m.state = StateEnterSummary
					return m, m.textArea.Focus()
				}

internal/tui/tui.go:437

• Same return-evaluation-order issue here: return m, m.textArea.Focus() can return a model that is still blurred even though Focus() was called.

				// After minor step, assign remaining packages as patch
				m.assignRemainingAsPatch()
				m.state = StateEnterSummary
				return m, m.textArea.Focus()
			}

[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated no new comments.