Rename LabDAQ → LabUI and overhaul plugin system

Branding:
- Rename app, window title, file extension (.labdaq → .labui), user data
  dirs (~/.labui/), spec file (labdaq.spec → labui.spec), and APP_NAME
  throughout all source, docs, and config files

Plugin system:
- Plugins no longer bundled in the PyInstaller build — installed at
  runtime by users via Settings → Plugins → Install Plugin (zip)
- PluginManager now takes user_dir + extra_scan_dirs; user plugins live
  in ~/.labui/plugins/, dev scan additionally covers project plugins/
- install_from_zip / uninstall / is_user_installed added to PluginManager
- vendor/ dir inside plugin zips: prepended to sys.path at load time so
  plugins can ship their own deps without requiring pip on end-user machine
- source_url field in manifest.json: shown as Download button in the
  missing-plugins dialog when a profile requires an absent plugin
- Frozen-app pip install now targets ~/.labui/plugin_packages/ using a
  real system Python (sys.executable is the exe in frozen builds)

Profile loading:
- Profile now stores plugins_manifest snapshot (id, name, version,
  source_url) alongside plugins_enabled
- On load, missing or dep-broken plugins trigger MissingPluginsDialog
  before the rest of the profile is applied; user can install from zip
  or download via source_url in-dialog, or cancel the load
- Plugin reconciliation only enables installed plugins — missing ones
  are not written to enabled.json

UI:
- Version label added to status bar (bottom-right, muted colour)
- Settings → Plugins tab: Install Plugin… button, per-plugin Remove
  button for user-installed plugins, live list refresh after install/remove

Docs:
- New docs/building.md covers the full release pipeline
- docs/plugin-development.md updated for new install flow, vendoring,
  source_url, profile behaviour, and distribution instructions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/main.py b/main.py
index ede6277..96dab8a 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,5 @@
 """
-main.py  —  LabDAQ entry point.
+main.py  —  LabUI entry point.
 
 Run:
     python main.py
@@ -11,6 +11,11 @@ Requirements:
 import sys, os
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
+# Plugin dependencies installed at runtime land here so the frozen app can import them.
+_PLUGIN_PACKAGES = os.path.join(os.path.expanduser("~"), ".labui", "plugin_packages")
+if os.path.isdir(_PLUGIN_PACKAGES) and _PLUGIN_PACKAGES not in sys.path:
+    sys.path.insert(0, _PLUGIN_PACKAGES)
+
 from PyQt6.QtWidgets import QApplication
 from ui.main_window import MainWindow
 from core.debug_log import install as install_debug_log
@@ -18,7 +23,7 @@ from core.debug_log import install as install_debug_log
 
 def main():
     app = QApplication(sys.argv)
-    app.setApplicationName("LabDAQ")
+    app.setApplicationName("LabUI")
     install_debug_log()  # tee stdout/stderr for the Debug window, before anything prints
 
     qss = os.path.join(os.path.dirname(os.path.abspath(__file__)), "ui", "style_dark.qss")