feat(project): unique COMPOSE_PROJECT_NAME in .env for Docker volumes

[RoboShyim (roboshyim)]

Summary

Implements #1251.

Docker Compose was using the directory basename as the project name, so named volumes (db-data, …) collided when a project folder was deleted and recreated with the same name (or two trees shared a basename). That made system:is-installed succeed against stale DB data and skip the install wizard.

Changes

Area	Behaviour
project create --docker	Writes COMPOSE_PROJECT_NAME=sw-<basename>-<6hex> to host .env (not .env.local)
Non-docker create	.env stays empty
Existing projects	Unset → basename behaviour (backward compatible); already set → left alone
flexmigrator.MigrateEnv	Keeps COMPOSE_PROJECT_NAME in the new empty .env when splitting flex env
Migration wizard → Docker	EnsureComposeProjectName if missing

Compose still runs with Dir = projectRoot (devtui/compose.go) and picks up .env automatically — no -p / compose name: key required.

Tests

• go test ./internal/shop/ ./internal/flexmigrator/ ./internal/devtui/ -run Migration…
• Scaffold docker vs non-docker, uniqueness of same basename, flex preserve, Ensure* preserve/append

Checklist

• project create --docker writes unique name to .env
• Two creates with same folder name get different names
• Non-docker does not require a project name
• Tests for scaffold docker vs non-docker
• Migration wizard path sets name if missing

[Codecov Comments Bot (codecov-commenter)]

Codecov Report

❌ Patch coverage is 80.00000% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.70%. Comparing base (3340b47) to head (bcf77fc).

Files with missing lines	Patch %	Lines
internal/shop/compose_project_name.go	83.33%	8 Missing ⚠️
internal/devtui/model_update.go	20.00%	4 Missing ⚠️
internal/flexmigrator/env.go	92.30%	1 Missing ⚠️
internal/shop/project_scaffold.go	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1252      +/-   ##
==========================================
+ Coverage   53.63%   53.70%   +0.06%     
==========================================
  Files         303      304       +1     
  Lines       23325    23390      +65     
==========================================
+ Hits        12511    12562      +51     
- Misses      10787    10801      +14     
  Partials       27       27              

Flag	Coverage Δ
go-test	53.70% <80.00%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Copilot]

Pull request overview

This PR addresses Docker Compose named-volume collisions by introducing a unique, stable COMPOSE_PROJECT_NAME written to the host-side project .env for Docker-based Shopware projects. This prevents reusing stale volumes when a project directory is recreated with the same basename, avoiding false-positive “installed” detection and skipped install wizards.

Changes:

• Scaffold Docker projects with a unique COMPOSE_PROJECT_NAME=sw-<basename>-<6hex> in .env; keep .env empty for non-Docker scaffolds.
• Preserve COMPOSE_PROJECT_NAME during flex env splitting (.env → .env.local) by re-writing it into the new .env.
• Ensure COMPOSE_PROJECT_NAME is present when saving the devtui migration wizard configuration (without overwriting existing values).

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
internal/shop/project_scaffold.go	Writes initial .env content via EnvFileContent, enabling unique Compose names for Docker scaffolds.
internal/shop/project_scaffold_test.go	Adds assertions for Docker vs non-Docker .env behavior and uniqueness across same-basename scaffolds.
internal/shop/compose_project_name.go	Introduces generation/extraction/ensure helpers for COMPOSE_PROJECT_NAME in host .env.
internal/shop/compose_project_name_test.go	Adds unit tests for name generation, .env content, extraction, and ensuring behavior.
internal/flexmigrator/env.go	Preserves COMPOSE_PROJECT_NAME in .env when splitting .env into .env.local.
internal/flexmigrator/env_test.go	Adds coverage ensuring COMPOSE_PROJECT_NAME survives flex env migration.
internal/devtui/model_update.go	Ensures .env has a Compose project name during migration wizard save flow.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.