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, 4 insertions, 4 deletions

diff --git a/plugins/base_plugin.py b/plugins/base_plugin.py
index 2dbb56d..d728d08 100644
--- a/plugins/base_plugin.py
+++ b/plugins/base_plugin.py
@@ -1,7 +1,7 @@
 """
 plugins/base_plugin.py
 
-Abstract base class for all LabDAQ plugins.
+Abstract base class for all LabUI plugins.
 
 To create a plugin:
   1. Create a directory under plugins/  e.g. plugins/my_plugin/
@@ -25,7 +25,7 @@ Integration points (all optional — override only what you need):
   get_devices()          → list of BaseDevice      auto-added to registry + engine
   get_filter_classes()   → {name: FilterBase cls}  custom signal pipeline filters
   get_settings_widget()  → QWidget | None          shown in Settings > Plugins
-  get_save_state()       → dict                    persisted in .labdaq profiles
+  get_save_state()       → dict                    persisted in .labui profiles
   apply_save_state(dict)                            restore from profile
 """
 
@@ -68,7 +68,7 @@ class PluginAction:
 
 class LabPlugin(ABC):
     """
-    Abstract base for all LabDAQ plugins.
+    Abstract base for all LabUI plugins.
 
     Subclass this, set the metadata properties, and override whatever
     integration hooks your plugin needs.
@@ -129,7 +129,7 @@ class LabPlugin(ABC):
     # ── Profile persistence ───────────────────────────────────────────────
 
     def get_save_state(self) -> Dict[str, Any]:
-        """Return a JSON-serialisable dict, saved with the .labdaq profile."""
+        """Return a JSON-serialisable dict, saved with the .labui profile."""
         return {}
 
     def apply_save_state(self, state: Dict[str, Any]) -> None: