Add ZIP import and empty project creation to ProjectModal

[Copilot]

• Explore repository structure and understand existing project creation flow
• Update ProjectModal.tsx to support 4 creation methods:
  • (Default) New project creation with initial_files injection
  • Git clone (already exists)
  • ZIP repo import (extract to root, .git to LightningFS)
  • Empty project creation (no initial_files)
• Update translation files (en/ja common.json)
• Build verification passed
• Code review - Fixed hardcoded Japanese error messages to use i18n
• CodeQL security check - No alerts found
• Fix: Store .git files in LightningFS (not IndexedDB) during ZIP import
• Fix: Use existing isLikelyTextFile helper for binary detection

Implementation Details

New Features

1. New Project (Primary button) - Creates project with initial_files injection
2. Empty Project - Creates project without any template files
3. Git Clone - Clones repository from GitHub (existing feature)
4. ZIP Import - Imports repository from ZIP file with:
   • Automatic root folder detection (strips single top-level folder)
   • .git files stored in LightningFS (not IndexedDB) for proper isomorphic-git integration
   • Uses existing isLikelyTextFile for binary detection

Changes

• src/components/ProjectModal.tsx - Refactored modal with 4 creation modes
• locales/en/common.json - Added translation keys for new features
• locales/ja/common.json - Added Japanese translations

Original prompt

---

This section details on the original issue you should resolve

<issue_title>project modal zip import/ 空プロジェクト作成</issue_title>
<issue_description>git cloneがバカ遅いから、

4つの方法で提供

• (デフォルト) 新規プロジェクト作成
  ↑ initial_files注入
• git clone
• zip repo import(.gitがある場合、それをちゃんと考慮)(展開はルートに)
• 空のプロジェクト作成(initial_filesなし)

project.ts, filerepository の修正</issue_description>

<agent_instructions>パスの扱いに注意。npm i -g pnpm && pnpm exec tsc --noEmit</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes project modal zip import/ 空プロジェクト作成 #300

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[Stasshe]

@copilot

git log failed: Could not find refs/heads/main.
再試行

こうなった。
├── fe/
│ │ │ ├── 0a61be78eee93a5d78577968db0c1284a37add
│ │ │ ├── a8dd5f19000f6f19e9e800a92b493720176ccc
│ │ │ ├── d3cafc53c595181c2bd2677f93ba37baf12dc6
│ │ │ └── e8b0e7b9a5a6ffd925e21fc44e68eaba315b93
│ │ ├── ff/
│ │ │ ├── 56a086d092a46fb6d799cf0d5ad206634fc86d
│ │ │ ├── 79c5160c9c525760f2c157c2c7f3bd340ad594
│ │ │ ├── b778faef479678293e2c6bf8e52bcc06c663e0
│ │ │ ├── e036a2c799c5a80fb0bd793a214a80f0167065
│ │ │ └── edf90e6e8278f0159b75a8b9159db1672c8cc1
│ │ ├── info/
│ │ └── pack/
│ ├── refs/
│ │ ├── heads/
│ │ └── tags/
│ ├── HEAD
│ ├──

確かにこうなってた。
githubから直接 zipダウンロードしたやつ。

あと、binaryファイルチェックは src/engine/helper/isLikelyTextFile.tsこれ使って。

[Copilot]

@copilot

git log failed: Could not find refs/heads/main.
...

Fixed in 3bf9718:

1. .git directory is now skipped during ZIP import to prevent broken git references
2. Now using isLikelyTextFile from src/engine/helper/isLikelyTextFile.ts for binary detection instead of the custom function

[Stasshe]

@copilot

は？頭悪いな。
.gitは、isomorphic gitのlightning fsにだけ保存するんでしょ？

こうならないように。
git log failed: Could not find refs/heads/main.
再試行

├── fe/
│ │ │ ├── 0a61be78eee93a5d78577968db0c1284a37add
│ │ │ ├── a8dd5f19000f6f19e9e800a92b493720176ccc
│ │ │ ├── d3cafc53c595181c2bd2677f93ba37baf12dc6
│ │ │ └── e8b0e7b9a5a6ffd925e21fc44e68eaba315b93
│ │ ├── ff/
│ │ │ ├── 56a086d092a46fb6d799cf0d5ad206634fc86d
│ │ │ ├── 79c5160c9c525760f2c157c2c7f3bd340ad594
│ │ │ ├── b778faef479678293e2c6bf8e52bcc06c663e0
│ │ │ ├── e036a2c799c5a80fb0bd793a214a80f0167065
│ │ │ └── edf90e6e8278f0159b75a8b9159db1672c8cc1
│ │ ├── info/
│ │ └── pack/
│ ├── refs/
│ │ ├── heads/
│ │ └── tags/
│ ├── HEAD
│ ├──

[Copilot]

@copilot

は？頭悪いな。
...

Fixed in bd7fab5. .git files from ZIP are now stored in LightningFS (via gitFileSystem.writeFile()) instead of being skipped. Regular files still go to IndexedDB.