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, 2 insertions, 1 deletions

diff --git a/ui/style_light.qss b/ui/style_light.qss
index 265894d..ff204fb 100644
--- a/ui/style_light.qss
+++ b/ui/style_light.qss
@@ -1,4 +1,4 @@
-/* LabDAQ — Light Theme */
+/* LabUI — Light Theme */
 * { font-family:"IBM Plex Sans","Segoe UI",Tahoma,sans-serif; font-size:12px; color:#1e293b; }
 QMainWindow,QDialog { background:#f8fafc; }
 QToolBar#mainToolbar { background:#ffffff; border-bottom:1px solid #e2e8f0; padding:4px 8px; spacing:4px; }
@@ -49,6 +49,7 @@ QScrollBar::add-line:vertical,QScrollBar::sub-line:vertical { height:0; }
 QSplitter::handle { background:#e2e8f0; }
 QSplitter::handle:hover { background:#3b82f6; }
 QStatusBar { background:#ffffff; border-top:1px solid #e2e8f0; color:#64748b; font-family:"IBM Plex Mono",monospace; font-size:11px; }
+QLabel#versionLabel { font-family:"IBM Plex Mono",monospace; font-size:10px; color:#64748b; padding-right:6px; }
 QPushButton { background:#f1f5f9; color:#475569; border:1px solid #cbd5e1; border-radius:4px; padding:5px 12px; }
 QPushButton:hover { background:#e2e8f0; color:#1e293b; }
 QTextEdit#codeEditor { font-family:"IBM Plex Mono",monospace; font-size:12px; background:#1e293b; color:#e2e8f0; border:1px solid #cbd5e1; border-radius:4px; padding:6px; }