Release v4.3: speak status line (Tolk) + Logging tab with housekeeping

- New screen-reader hotkey "Speak the RemSound status information" (issue #13):
  reads the status line aloud through the active screen reader via Tolk, fires from
  anywhere (system-wide), unset by default. Built behind an IScreenReaderOutput seam
  so a future build can swap Tolk for Prism on Windows 10+ without touching callers.
  Tolk DLLs vendored under tolk/ and shipped next to the exe.
- New Logging tab in Preferences: Enable logs + Write logs now moved there, plus
  opt-in startup "warn if logs folder exceeds N MB" and "delete logs older than N days",
  and a "Delete all logs" button (Yes/No confirm). New LogMaintenance helper + AppConfig
  settings drive it.
- Manual (readme.html + regenerated MANUAL.md), About changelog and RELEASE_NOTES
  updated in plain English; csproj <Version> bumped to 4.3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/RemSound.App/RemSound.App.csproj

@@ -14,7 +14,7 @@
          tag_name on the latest GitHub release; bump it on every public release. The
          AssemblyVersion / FileVersion default to this value, and Assembly.GetName().Version
          is what the About dialog and the updater both read. -->
-    <Version>4.2</Version>
+    <Version>4.3</Version>
   </PropertyGroup>
 
   <ItemGroup>
@@ -79,6 +79,17 @@
       <Link>readme.html</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <!-- Tolk screen-reader output DLLs (vendored 2026-06-19). Native libraries P/Invoked by
+         TolkScreenReaderOutput so RemSound can speak the status line aloud on demand (issue #13) —
+         needed because a GLOBAL hotkey fires while RemSound isn't focused, where NVDA won't read
+         anything itself. Tolk.dll loads its two helper DLLs from the same folder, so all three ship
+         flat next to the exe. Copied on build AND publish; the EnsureTolkDllsPublished target below
+         makes the publish copy marker-independent (the same belt-and-braces the cue WAVs use). -->
+    <Content Include="..\..\tolk\Tolk.dll;..\..\tolk\nvdaControllerClient64.dll;..\..\tolk\SAAPI64.dll;..\..\tolk\LICENSE-Tolk.txt">
+      <Link>%(Filename)%(Extension)</Link>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
+    </Content>
   </ItemGroup>
 
   <!-- Guarantee the cue WAVs land in a PUBLISHED build. The Content items above use
@@ -97,4 +108,14 @@
           DestinationFolder="$(PublishDir)default sounds"
           SkipUnchangedFiles="false" />
   </Target>
+
+  <!-- Same marker-independent guarantee for the Tolk DLLs: always copy them into a PUBLISHED build
+       so a release zip can never ship without the screen-reader libraries the "speak status line"
+       feature needs. -->
+  <Target Name="EnsureTolkDllsPublished" AfterTargets="Publish">
+    <ItemGroup>
+      <_TolkFiles Include="..\..\tolk\Tolk.dll;..\..\tolk\nvdaControllerClient64.dll;..\..\tolk\SAAPI64.dll;..\..\tolk\LICENSE-Tolk.txt" />
+    </ItemGroup>
+    <Copy SourceFiles="@(_TolkFiles)" DestinationFolder="$(PublishDir)" SkipUnchangedFiles="false" />
+  </Target>
 </Project>