[v0.3] Repo Restructure: Split into core/, local/, and web/ layout

[Codex-Crusader]

Overview

This is a tracking issue for the v0.3 repo restructure described in ROADMAP.md.

The current flat layout (app/, dashboard/, config/, src/, storage/) needs to be reorganised into a clean split that separates the shared engine from the two deployment surfaces (local app and web demo).

Target Directory Layout

pulseengine/
  core/         ← shared engine (analysis, config, storage, backtest)
  local/        ← full-featured Streamlit dashboard
  web/          ← restricted demo build
Docs/
tests/

Why This Matters

Everything in v0.4 (PyInstaller EXE, launcher, tray icon) and v0.5 (FinBERT, offline mode, export) depends on local/ existing as a distinct surface. The web demo must stay lightweight and stateless — it cannot share modules that perform file I/O or run local model inference. This split enforces that boundary at the file system level.

Sub-Issues

This work is tracked across three focused sub-issues:

• [v0.3] Move shared engine modules into pulseengine/core/ #32 — Move shared engine modules into core/
• [v0.3] Create pulseengine/local/ surface with full-feature Streamlit dashboard #33 — Create local/ surface with full Streamlit dashboard
• [v0.3] Create pulseengine/web/ surface with restricted Streamlit demo build #34 — Create web/ surface with restricted demo build

Acceptance Criteria

• pulseengine/core/ contains app.py (engine), config.py, storage.py, backtest.py
• pulseengine/local/ contains the full-feature Streamlit dashboard
• pulseengine/web/ contains the restricted demo (no file I/O, no local model inference, no persistent state)
• All existing tests pass against the new layout
• README.md quick-start instructions updated to reflect new entry points
• No import cycle between core/, local/, and web/

References

• ROADMAP.md v0.3 — Foundation Split + Arbitrary Tickers
• Architecture note: "The core/ directory is the shared foundation. Changes there affect both the local app and the web demo."