feat: integrated editor, project templates, visual env vars, log search/download, multi-session terminal

[Copilot]

Adds five developer-experience improvements: an integrated file editor with project scaffolding templates, a visual env-var editor, searchable/filterable/downloadable logs, and a multi-session terminal per container.

Integrated Compose/Dockerfile Editor (ComposeEditorView)

• New Editor sidebar item hosts a monospaced TextEditor switchable between docker-compose.yml and Dockerfile
• Open/Save via NSOpenPanel/NSSavePanel; file kind auto-detected on open

Project Templates

• Five built-in starters (Node.js+Postgres, Flask+Redis, Go multi-stage, PostgreSQL, Nginx static) available from a "Templates" sheet
• Each template pre-fills both the compose file and Dockerfile editors

Visual Environment Variable Management (ContainerSettingsView)

• Replaced raw KEY=VALUE text fields with separate Key / Value columns
• New SettingsModel.EnvEntry splits on the first = only — preserves values that contain =

Log Search, Filter & Download

• Container logs tab: live search bar with AttributedString match highlighting, "Errors only" toggle, line counter, and Download → NSSavePanel
• Compose log panel: inline filter bar + Download button added alongside existing Copy/Clear

Multi-Session Terminal

• Each container now holds [ContainerTerminalSession] in AppState instead of a single session
• Tab bar shows sessions with a connected indicator; + adds, × closes (last tab is protected)
• Sessions identified by a stable UUID objectID — avoids ForEach mis-renders when middle sessions are removed

// AppState now manages session lists per container
func terminalSessions(for containerID: String) -> [ContainerTerminalSession]
func addTerminalSession(for containerID: String) -> ContainerTerminalSession
func removeTerminalSession(_ session: ContainerTerminalSession)

• Fixes Aprimorar experiência de desenvolvimento #4

[Copilot]

Pull request overview

This PR delivers multiple developer-experience enhancements to the AppleDockerApp UI: a new integrated Compose/Dockerfile editor with project templates, improved environment-variable editing, searchable/downloadable logs, and multi-session container terminals backed by persistent AppState storage.

Changes:

• Added ComposeEditorView with built-in project templates plus Open/Save support, and exposed it in the sidebar.
• Reworked container environment variable editing into structured key/value rows with correct parsing of values containing =.
• Enhanced logs (container + compose) with search/filter UI and added “Download” actions; updated terminal to support multiple sessions per container.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
Sources/AppleDockerApp/Views/ContainerTerminalView.swift	Implements multi-session terminal UI with tab bar and per-session panel.
Sources/AppleDockerApp/Views/ContainerTerminalSession.swift	Adds stable identity (objectID) and labeling for terminal sessions.
Sources/AppleDockerApp/Views/ContainerSettingsView.swift	Switches env vars to key/value entries and updates config serialization.
Sources/AppleDockerApp/Views/ContainerDetailView.swift	Adds log search/filter UI, highlighting, and download support for container logs.
Sources/AppleDockerApp/Views/ComposeView.swift	Adds compose log filtering UI and download support.
Sources/AppleDockerApp/Views/ComposeEditorView.swift	Introduces new integrated editor view + project templates sheet.
Sources/AppleDockerApp/AppState.swift	Updates terminal session storage to support multiple sessions per container.
Sources/AppleDockerApp/App.swift	Adds “Editor” sidebar item routing to ComposeEditorView.

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[djpfs]

@copilot Fix the code for all comments in this review comment.

When a review comment includes a suggested change, apply the suggestion exactly.

Do not make changes beyond what is described in the linked review comment.

[Copilot]

Addressed in 946db53.