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/docs/plugin-development.md b/docs/plugin-development.md
index b0c3a63..8722376 100644
--- a/docs/plugin-development.md
+++ b/docs/plugin-development.md
@@ -1,4 +1,4 @@
-# LabDAQ Plugin Development Guide
+# LabUI Plugin Development Guide
 
 Plugins live under `plugins/` as self-contained directories. The app discovers them automatically; the user enables or disables them in **Settings → Plugins**. A disabled plugin leaves zero trace in the UI.
 
@@ -287,7 +287,7 @@ The widget is created once when the plugin loads. Apply changes immediately (no
 
 ### 5.5 Profile persistence
 
-`.labdaq` profiles save the **enabled plugin list** automatically — loading a profile enables/disables plugins to match the saved state. Per-plugin configuration state is also saved if you implement these two methods.
+`.labui` profiles save the **enabled plugin list** automatically — loading a profile enables/disables plugins to match the saved state. Per-plugin configuration state is also saved if you implement these two methods.
 
 ```python
 def get_save_state(self) -> dict:
@@ -436,7 +436,7 @@ This plugin adds a sine-wave virtual channel and a toolbar button to toggle a di
   "name":        "Sine Demo",
   "version":     "1.0.0",
   "description": "Virtual sine-wave channel for testing.",
-  "author":      "LabDAQ",
+  "author":      "LabUI",
   "entry_point": "plugin.SineDemoPlugin"
 }
 ```
@@ -537,10 +537,10 @@ Import Qt widgets inside methods or inside `on_load`. This avoids import errors
 Stop background threads (`_running = False; _thread.join()`), disconnect signals, close windows. The app calls `on_unload()` both on user disable and on application close.
 
 **Filter `__init__` params must be JSON-serialisable.**
-They are written into `.labdaq` profiles via `to_dict()` and reconstructed via `filter_from_dict()`. Stick to `int`, `float`, `str`, `bool`.
+They are written into `.labui` profiles via `to_dict()` and reconstructed via `filter_from_dict()`. Stick to `int`, `float`, `str`, `bool`.
 
 **Profiles enable and disable plugins.**
-Loading a `.labdaq` profile reconciles plugin state: plugins not in the profile's enabled list are disabled, plugins in the list are enabled. `apply_save_state` is called after the plugin is loaded. `plugins/enabled.json` is updated to match.
+Loading a `.labui` profile reconciles plugin state: plugins not in the profile's enabled list are disabled, plugins in the list are enabled. `apply_save_state` is called after the plugin is loaded. `plugins/enabled.json` is updated to match.
 
 **Enabled state persists across restarts.**
 `plugins/enabled.json` is written every time a toggle changes. Delete it to reset all plugins to disabled.