宜博 / lemongraph

c_pick_folder 补上 Windows（PowerShell FolderBrowserDialog）和 Linux
（zenity 优先、回退 kdialog）实现，三平台都覆盖到。c_project_create
（U-002 已实现的 project_scaffold.create_project()）第一次接上 HTTP
路由 POST /api/projects——backend_server.py 因此第一次需要持有 sqlite
连接，schema.connect() 加 check_same_thread=False 参数，配合
server.conn_lock 序列化 ThreadingHTTPServer 各请求线程的访问。
frontend/app.js 补上 #/setup 真实交互（选文件夹→校验 Git 仓库→非
Git 仓库二次确认→创建→跳转仪表盘），DOM class 命名对齐
docs/wireframes/v_project_setup.html。

REQ-11 完整 happy 用例（含创建 task）还需要 U-023 的
v_goal_composer/c_task_create，本 Unit 只完成 v_project_setup/
c_pick_folder/c_project_create 部分，development-plan.md 已记录。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

U-003's coverage in unit_matrix.json is empty (no M/V/C/P/REQ) -- its Done
criterion is a property, not a contract: platform dir and any target
project dir stay physically separate, and the raw log directory never
enters graphlemon's own git history. src/paths.py makes the `~/.graphlemon/
logs/...` example path from 01-M 1.13 / architecture doc §13.2 into the
actual convention (GRAPHLEMON_HOME-overridable), defaulting to the user's
home directory so it's outside this repo's checkout by construction rather
than by a .gitignore rule. is_separate_from() is the property U-003 has to
guarantee, tested from both directions (target nested in platform home,
platform home nested in target).

Also fixes a second stale reference to the pre-correction U-002 scope,
found while scoping this Unit: U-036's "supervisor/ directory ownership"
open question in development-plan.md still described U-002 as owning a
`.claude/`/`skills/`/`src/` target-project tree (already corrected out of
U-002 itself last commit). Notes that this makes the open question
moot -- supervisor/ was never a real target-project candidate.

8 new stdlib unittest cases (src/test_paths.py); 31 total across
U-001/U-002/U-003, all passing.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>