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, 5 insertions, 5 deletions

diff --git a/ui/profile_manager_ui.py b/ui/profile_manager_ui.py
index 8966f8f..446e867 100644
--- a/ui/profile_manager_ui.py
+++ b/ui/profile_manager_ui.py
@@ -17,8 +17,8 @@ from PyQt6.QtGui  import QAction
 from core.profile import Profile, ProfileManager
 
 
-PROFILE_EXT    = ".labdaq"
-PROFILE_FILTER = f"LabDAQ Profile (*{PROFILE_EXT});;All files (*)"
+PROFILE_EXT    = ".labui"
+PROFILE_FILTER = f"LabUI Profile (*{PROFILE_EXT});;All files (*)"
 
 
 class ProfileButton(QPushButton):
@@ -134,7 +134,7 @@ class ProfileButton(QPushButton):
     # ── Helpers ───────────────────────────────────────────────────────────────
 
     def _default_dir(self) -> str:
-        d = os.path.join(os.path.expanduser("~"), "labdaq_profiles")
+        d = os.path.join(os.path.expanduser("~"), "labui_profiles")
         os.makedirs(d, exist_ok=True)
         return d
 
@@ -142,8 +142,8 @@ class ProfileButton(QPushButton):
         app = QApplication.instance()
         if app and hasattr(app, "topLevelWidgets"):
             for w in app.topLevelWidgets():
-                if hasattr(w, "setWindowTitle") and "LabDAQ" in (w.windowTitle() or ""):
-                    title = "LabDAQ"
+                if hasattr(w, "setWindowTitle") and "LabUI" in (w.windowTitle() or ""):
+                    title = "LabUI"
                     if name:
                         title += f"  —  {name}"
                     if self._current_path: