WinBaas: Registry node, View menu, and Visual Studio branch

[KlausLoeffelmann]

Summary

Extend WinBaas.App (src/WinForms/NET10/WinBaas) along three axes:

1. Registry node — a new top-level Registry tree branch seeded with
   the most frequently manually changed registry settings. Different
   right-pane schema (Value · Registry path · Brief description),
   abbreviated description in the grid, full description in the
   StatusStrip. If selected for backup, emit a Registry Backup folder
   containing a PowerShell restore script (plus a single .reg file).
2. View menu — new top-level View MenuStrip item with
   Expand all nodes, Collapse all nodes, Expand selected.
3. Visual Studio branch — completely different shape:
   • Top-level Visual Studio node.
     • Selecting it shows a flat overview (one row per installed SKU):
       SKU display name, install date, version, settings-file path under
       %LOCALAPPDATA%\Microsoft\VisualStudio\<hive>.
     • Children: one node per installed SKU
       (year / SKU edition / ring), e.g. VS 2026 — Enterprise — Int.Preview.
       Each SKU node has two children: Hives and Extensions.
       • Hives shows the experimental hives for that SKU
         (e.g. 18.0, 18.0_b83bbaee) as rows of
         Label (hive name) · LinkLabel (path) · Button (Copy).
       • Extensions lists the installed extensions for that SKU.
     • Checking an SKU ⇒ back up that SKU's hives + extensions folders.

The existing Visual Studio 2022 entry under Developer Tools is removed
— Visual Studio is now exclusively reachable through the new top-level
branch.

High-level approach

• Right pane becomes pluggable. Replace the single _grid in
  _splitInner.Panel1 with a container (_detailHost) that hosts one of
  several detail UserControls, chosen by the type of the selected tree
  node. New controls: FilesGridControl (current behaviour, extracted),
  RegistryGridControl, VsOverviewControl, VsHivesControl,
  VsExtensionsControl. Each control exposes the events FrmMain
  needs (checked-state changes, selection changes, status-text changes).
• Node-tag taxonomy. Beyond the existing CatalogEntry /
  CategoryTag, introduce RegistryGroupTag, VsRootTag, VsSku,
  VsHivesTag, VsExtensionsTag so the tree carries the data each
  detail control needs without leaking the catalog model.
• Discovery extensions. Two new discovery paths in DiscoveryService
  (or dedicated services): Registry (probe each curated registry value,
  return observed value + IsPresent) and VisualStudio (vswhere
  primary, hive-folder fallback).
• Backup extensions. BackupService learns two new shapes:
  • Registry Backup\restore.ps1 + per-value .reg dump.
  • Per-SKU folder copies for VS hives and extensions, with cache
    folders excluded.
• Catalog edit. Remove the existing Visual Studio 2022 entry from
  BuildDeveloperSeed; add the Registry + Visual Studio top-level
  entries.

Files touched (planned)

New

• Models/RegistryDescriptor.cs — curated value: hive (HKCU/HKLM/…),
  path, value name, value kind, short description, full description,
  default value (optional).
• Models/RegistryDiscoveredItem.cs — observed value + IsPresent
  flag + descriptor reference.
• Models/VsSku.cs — year, edition (Community/Professional/Enterprise),
  ring (Release/Preview/IntPreview/Main), version, install date,
  settings-file path, hive root.
• Models/VsHive.cs — hive folder name, absolute path.
• Models/VsExtension.cs — name, publisher, version, install path.
• Services/IRegistryCatalog.cs + RegistryCatalog.cs — seeds the
  ~25 curated registry entries.
• Services/IVisualStudioDiscovery.cs + VisualStudioDiscovery.cs —
  finds installed SKUs (vswhere preferred, hive-folder fallback),
  hives, extensions.
• Controls/FilesGridControl.cs (+ .Designer.cs) — current
  files/folders/env-var/SQL grid behaviour extracted from FrmMain.
• Controls/RegistryGridControl.cs (+ .Designer.cs) — three columns:
  [✓] · Value · Registry path · Description (abbreviated). Raises
  StatusTextChanged with the full description on row enter/select.
• Controls/VsOverviewControl.cs (+ .Designer.cs) — flat grid of SKUs.
• Controls/VsHivesControl.cs (+ .Designer.cs) — TableLayoutPanel
  rows of Label (hive name) + LinkLabel (path) + Button (Copy).
• Controls/VsExtensionsControl.cs (+ .Designer.cs) — list/grid of
  installed extensions.

Modified

• Models/CatalogEntryKind.cs — add Registry, VisualStudio.
• Services/DiscoveryService.cs — route Registry and VisualStudio
  kinds to the new helpers / dedicated services.
• Services/BackupService.cs — recognise registry items and VsSku
  selections; emit Registry Backup\restore.ps1 + .reg; copy per-SKU
  hive + extension folders.
• Services/CatalogService.cs — remove the Visual Studio 2022
  developer entry; add Registry and Visual Studio entries that
  act as the roots populated by the new specialised discoveries.
• FrmMain.Designer.cs — add View menu (Expand all, Collapse all, Expand selected); replace direct _grid placement in
  _splitInner.Panel1 with a _detailHost panel; promote _grid
  ownership into FilesGridControl.
• FrmMain.cs / FrmMain.TreeSync.cs / FrmMain.Commands.cs —
  • Populate Registry + VS branches alongside catalog branches.
  • On AfterSelect, swap the detail control hosted in _detailHost.
  • Wire View menu commands.
  • Route status-text updates from detail controls into _statusInfo.

Registry seed (~25 entries)

Curated across these themes (final list trimmed during implementation):

• Explorer: ShowSuperHidden, Hidden, HideFileExt, LaunchTo,
  AutoCheckSelect.
• Taskbar: TaskbarAl (alignment), TaskbarDa (widgets),
  TaskbarMn (chat), ShowTaskViewButton, SearchboxTaskbarMode.
• Search: BingSearchEnabled, CortanaConsent.
• Privacy / Telemetry: AllowTelemetry,
  TailoredExperiencesWithDiagnosticDataEnabled, Start_TrackProgs.
• Windows Update: PauseUpdatesExpiryTime, BranchReadinessLevel.
• Dev Mode: AllowDevelopmentWithoutDevLicense,
  AllowAllTrustedApps, LongPathsEnabled.
• Context Menu (Win11):
  {86ca1aa0-34aa-4e8b-a509-50c905bae2a2} shell-extension override
  (restore classic context menu).
• Power / UX: HibernateEnabled (HKLM), VerboseStatus.
• Defender: DisableAntiSpyware (HKLM, informational only — flagged
  as policy-only).

If a value is not present on the machine it is still listed (greyed,
checkbox disabled) so the user knows it exists in the catalog.

Registry backup output

<destination>\Registry Backup\
    restore.ps1
    WinBaas-Registry-<timestamp>.reg

• restore.ps1 — for each selected entry, write the recorded value
  back (New-Item -Force + Set-ItemProperty -Force) using the
  descriptor's RegistryValueKind.
• WinBaas-Registry-<timestamp>.reg — single .reg file with the
  captured values, importable via regedit /s.
• Skipped (not-present) entries are emitted as commented-out lines in
  both files so the user can opt-in later.

Visual Studio discovery

1. Primary: invoke vswhere.exe if discoverable
   (%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe)
   with -prerelease -all -format json to obtain
   installationVersion, installDate, displayName, channelId,
   productId, productLineVersion (year), installationPath.
2. Fallback: enumerate %LOCALAPPDATA%\Microsoft\VisualStudio\ for
   17.*, 18.* hives and parse:
   • 17.0_xxxxxxxx → VS 2022 Release main hive.
   • 17.0_xxxxxxxxExp → experimental hive.
   • 18.0_xxxxxxxx → VS 2026 Main / Int.Preview (channel decoded via
     Settings\ApplicationPrivateSettings.xml ChannelId where
     available).
3. SKU node label: "VS {year} — {edition} — {ring}". When channel
   data is not available we still surface a (unknown ring) placeholder.
4. Settings file:
   %LOCALAPPDATA%\Microsoft\VisualStudio\<hive>\CurrentSettings.vssettings
   if present, else the hive root.

Visual Studio backup output

<destination>\Visual Studio\<SkuLabel>\
    Hives\<hive>\…
    Extensions\<extension>\…
    summary.md

• Hives\<hive>\ — copy of the hive folder, excluding caches:
  ComponentModelCache, Backup Files, ImageLibrary, MEFCache,
  ShellPackages.pkgdef.
• Extensions\<extension>\ — copy of the SKU's Extensions sub-folder.
• summary.md — per-SKU enumerates hives, extensions, and the
  settings-file path captured at backup time.

View menu

• Expand all nodes — _treeSources.ExpandAll().
• Collapse all nodes — _treeSources.CollapseAll().
• Expand selected — recursively expand _treeSources.SelectedNode
  (no-op when null).

Persist nothing extra — tree state already round-trips via
PersistTreeState / RestoreTreeState. The change just needs to keep
working for the new top-level branches.

Open items (resolve during implementation)

• Microsoft.Win32 registry APIs are net10-windows-only; the project
  already targets net10.0-windows10.0.22000.0, so no csproj change.
• HKLM values surface read-only / require elevation — flag in
  description text and skip silently on access denial.
• vswhere is optional; the fallback path covers VS 2026 Insiders
  cleanly.
• RegistryGridControl description abbreviation: truncate at the first
  sentence boundary or ~80 chars (whichever shorter), with … suffix.

Verification

dotnet build src\WinForms\NET10\WinBaas\WinBaas.slnx

Implementation checklist

• extract-files-grid — pull current _grid plumbing into
  FilesGridControl; introduce _detailHost in FrmMain.Designer.cs.
• registry-models — add RegistryDescriptor,
  RegistryDiscoveredItem, registry-related enum additions.
• registry-catalog — IRegistryCatalog + RegistryCatalog
  seeded with ~25 curated entries.
• registry-discovery — registry probing; returns observed
  values plus exists flag.
• registry-grid-control — RegistryGridControl UserControl +
  Designer.
• registry-backup — emit Registry Backup\restore.ps1 + .reg
  from BackupService when registry items are selected.
• vs-models — VsSku, VsHive, VsExtension.
• vs-discovery — IVisualStudioDiscovery +
  VisualStudioDiscovery (vswhere primary, hive-folder fallback).
• vs-overview-control — flat SKU grid.
• vs-hives-control — LinkLabel + Copy button rows.
• vs-extensions-control — extensions grid.
• vs-tree-population — build VS branch (root → SKU →
  Hives/Extensions) during PopulateSourceTree.
• vs-backup — per-SKU hive + extension folder copy with caches
  excluded.
• catalog-edits — remove Visual Studio 2022 Developer-Tools
  entry; add Registry + VS root entries.
• view-menu — add View menu items + handlers.
• detail-host-wiring — pick the right UserControl in
  AfterSelect; route StatusTextChanged into _statusInfo.
• tree-state-compat — ensure new top-level branches restore
  expansion state.
• build-verify —
  dotnet build src\WinForms\NET10\WinBaas\WinBaas.slnx clean.