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, 21 insertions, 7 deletions

diff --git a/core/profile.py b/core/profile.py
index 7ede859..8c73b4b 100644
--- a/core/profile.py
+++ b/core/profile.py
@@ -9,7 +9,7 @@ Lab profile — saves and loads the complete operator configuration:
   • Derived channels — all virtual/computed channels
   • Plot layout     — pane arrangement, traces, axes, time window
 
-Profiles are stored as human-readable JSON files (.labdaq).
+Profiles are stored as human-readable JSON files (.labui).
 """
 
 from __future__ import annotations
@@ -80,6 +80,8 @@ class Profile:
     # plugin_state = {plugin_id: plugin.get_save_state()}
     plugins_enabled: List[str]                 = field(default_factory=list)
     # plugins_enabled = [plugin_id, ...]  — which plugins were on when saved
+    plugins_manifest: List[Dict]               = field(default_factory=list)
+    # plugins_manifest = [{plugin_id, name, version, description, requires, source_url}]
     script_vars:  Dict[str, Any]               = field(default_factory=dict)
     # script_vars — shared vars dict accessible as `vars` in all expressions
 
@@ -99,9 +101,10 @@ class Profile:
             derived      = d.get("derived", []),
             plot         = d.get("plot"),
             settings        = d.get("settings", {}),
-            plugin_state    = d.get("plugin_state", {}),
-            plugins_enabled = d.get("plugins_enabled", []),
-            script_vars     = d.get("script_vars", {}),
+            plugin_state     = d.get("plugin_state", {}),
+            plugins_enabled  = d.get("plugins_enabled", []),
+            plugins_manifest = d.get("plugins_manifest", []),
+            script_vars      = d.get("script_vars", {}),
         )
 
     def save(self, path: str):
@@ -127,10 +130,10 @@ class ProfileManager:
         # Save
         profile = ProfileManager.capture(registry, processor, chart_cfg,
                                          control_specs, settings)
-        profile.save("my_lab.labdaq")
+        profile.save("my_lab.labui")
 
         # Load
-        profile = Profile.load("my_lab.labdaq")
+        profile = Profile.load("my_lab.labui")
         ProfileManager.apply(profile, registry, processor, ...)
     """
 
@@ -221,9 +224,20 @@ class ProfileManager:
         with processor._lock:
             p.script_vars = dict(processor._script_vars)
 
-        # Plugin state + enabled list
+        # Plugin state + enabled list + manifest snapshot
         if plugin_manager is not None:
             p.plugins_enabled = plugin_manager.get_enabled_ids()
+            for pid in p.plugins_enabled:
+                m = plugin_manager.get_manifest(pid)
+                if m:
+                    p.plugins_manifest.append({
+                        "plugin_id":   m.plugin_id,
+                        "name":        m.name,
+                        "version":     m.version,
+                        "description": m.description,
+                        "requires":    m.requires,
+                        "source_url":  m.source_url,
+                    })
             for plugin in plugin_manager.get_loaded():
                 try:
                     state = plugin.get_save_state()