ci/fix: pin TinyGo 0.41.1 in pr-ci/release-main; fix installer Pascal Script type mismatch

- .github/workflows/{pr-ci,release-main}.yml pinned tinygo-version "0.41.0", which
  cannot assemble a goroot from the Go 1.26 stdlib the runner resolves to ("package
  internal/strconv is not in std") — refactor-harness.yml's TinyGo amd64 gates job
  already carries this exact fix+errata comment; the other two workflows were never
  updated to match. Confirmed via this PR's own "Build Embedded (TinyGo)" job.

- packaging/windows/ClassicStack.iss: ResolveVolumesPlaceholder failed to compile
  ("Type mismatch") because LoadStringFromFile's second parameter is `var S:
  AnsiString`, a by-reference parameter that requires an exact type match, while
  Contents was declared as the default Unicode `string`. Load into a dedicated
  AnsiString and convert, per Inno Setup's Pascal Script rules for
  LoadStringFromFile/SaveStringToFile.

The .iss fix is reasoned from the Pascal Script signatures, not locally compiled —
no Windows/ISCC toolchain available here. Will confirm against the next CI run
rather than claim it's verified.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: pgodwin

.github/workflows/pr-ci.yml

@@ -225,7 +225,11 @@ jobs:
       - name: Setup TinyGo
         uses: acifani/setup-tinygo@v2
         with:
-          tinygo-version: "0.41.0"
+          # 0.41.0 cannot assemble a goroot from a Go 1.26 stdlib — it fails with
+          # "package internal/strconv is not in std", which 1.26 introduced. The
+          # runner resolves to 1.26 despite go.mod pinning 1.25.12, so track 0.41.1
+          # (see refactor-harness.yml's TinyGo amd64 gates job, fixed there first).
+          tinygo-version: "0.41.1"
 
       - name: Build WT32-ETH01
         run: bash scripts/build_wt32eth01.sh

.github/workflows/release-main.yml

@@ -216,7 +216,9 @@ jobs:
       - name: Setup TinyGo
         uses: acifani/setup-tinygo@v2
         with:
-          tinygo-version: "0.41.0"
+          # 0.41.0 cannot assemble a goroot from a Go 1.26 stdlib — see
+          # refactor-harness.yml's TinyGo amd64 gates job, fixed there first.
+          tinygo-version: "0.41.1"
 
       - name: Build WT32-ETH01
         run: bash scripts/build_wt32eth01.sh

packaging/windows/ClassicStack.iss

@@ -304,18 +304,25 @@ end;
 procedure ResolveVolumesPlaceholder;
 var
   ConfigFile, Contents, VolumesPath: string;
+  RawContents: AnsiString;
 begin
   ConfigFile := ExpandConstant('{commonappdata}\{#ConfigDirName}\server.toml');
   if not FileExists(ConfigFile) then
     Exit;
-  if not LoadStringFromFile(ConfigFile, Contents) then
+  // LoadStringFromFile's second parameter is `var S: AnsiString` — a var (by-ref)
+  // parameter requires an EXACT type match in Pascal, so passing the plain `string`
+  // (Unicode String, the Inno Setup 6 default) used everywhere else in this
+  // procedure is a compile-time type mismatch. Load into a dedicated AnsiString,
+  // then convert once.
+  if not LoadStringFromFile(ConfigFile, RawContents) then
     Exit;
+  Contents := String(RawContents);
   if Pos('__VOLUMES__', Contents) = 0 then
     Exit;
   VolumesPath := ExpandConstant('{commonappdata}\{#ConfigDirName}\Volumes');
   StringChangeEx(VolumesPath, '\', '/', True);
   StringChangeEx(Contents, '__VOLUMES__', VolumesPath, True);
-  SaveStringToFile(ConfigFile, Contents, False);
+  SaveStringToFile(ConfigFile, AnsiString(Contents), False);
 end;
 
 // --- Wizard/step wiring ----------------------------------------------------