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, 72 insertions, 0 deletions

diff --git a/labui.spec b/labui.spec
new file mode 100644
index 0000000..8468909
--- /dev/null
+++ b/labui.spec
@@ -0,0 +1,72 @@
+# labui.spec
+#
+# PyInstaller build spec. Build with:
+#   pyinstaller labui.spec
+#
+# Output: dist/LabUI/LabUI.exe (onedir build — required, not onefile:
+# tufup replaces individual files in the install directory on update,
+# which a single-file onefile exe can't do).
+
+import sys
+from pathlib import Path
+
+block_cipher = None
+
+root_dir = Path(SPECPATH)
+
+# root.json is generated by scripts/release/repo_init.py — bundle it once it
+# exists so a fresh install can bootstrap tufup trust without an insecure
+# first fetch. Skip silently before that's ever been run (e.g. first build).
+datas = [
+    (str(root_dir / "ui" / "style_dark.qss"), "ui"),
+    (str(root_dir / "ui" / "style_light.qss"), "ui"),
+    (str(root_dir / "ui" / "style.qss"), "ui"),
+    (str(root_dir / "plugins"), "plugins"),
+]
+_root_json = root_dir / "scripts" / "release" / "repository" / "metadata" / "root.json"
+if _root_json.exists():
+    datas.append((str(_root_json), "repository/metadata"))
+
+a = Analysis(
+    ["main.py"],
+    pathex=[str(root_dir)],
+    binaries=[],
+    datas=datas,
+    hiddenimports=[],
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=[],
+    win_no_prefer_redirects=False,
+    win_private_assemblies=False,
+    cipher=block_cipher,
+    noarchive=False,
+)
+pyz = PYZ(a.pure, a.zipped_data, cipher=block_cipher)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    [],
+    exclude_binaries=True,
+    name="LabUI",
+    debug=False,
+    bootloader_ignore_signals=False,
+    strip=False,
+    upx=True,
+    console=False,
+    disable_windowed_traceback=False,
+    target_arch=None,
+    codesign_identity=None,
+    entitlements_file=None,
+)
+coll = COLLECT(
+    exe,
+    a.binaries,
+    a.zipfiles,
+    a.datas,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+    name="LabUI",
+)