Fix #33: Add an option to save converted images in the source folder

CLAUDE.md

@@ -66,13 +66,13 @@ After editing `.po` files, always run `compile-translations.ps1` to regenerate t
 
 **`src/Sic/SettingsDialog.cs` + `SettingsDialog.Designer.cs`** — Settings form. A `TabControl` (filling the form, OK/Cancel beneath) with two tabs, each its own flat `TableLayoutPanel`:
 - **General** — language dropdown, confirm-exit checkbox, "check for updates on startup" checkbox, background update-frequency dropdown.
-- **Images** — output folder (textbox + browse + reset), a "detect data in clipboard" checkbox (issue #36), and a target-formats checklist that selects which formats appear in the main window's dropdown (issue #47). Built as individual `CheckBox` controls stacked in a `TableLayoutPanel` (`formatsPanel`, filled at runtime in `PopulateFormats()`) inside a `GroupBox` (`formatsGroupBox`) — *not* a `CheckedListBox`, which doesn't reliably announce toggle state changes to screen readers. The group box caption (rather than a separate label) supplies the accessible group name; each checkbox is its own tab stop. OK requires at least one format ticked; when all are ticked it saves `EnabledFormats` as empty so formats added in future versions show automatically.
+- **Images** — output folder (textbox + browse + reset), a "save converted images in the same folder as the original" checkbox (issue #33), a "detect data in clipboard" checkbox (issue #36), and a target-formats checklist that selects which formats appear in the main window's dropdown (issue #47). Built as individual `CheckBox` controls stacked in a `TableLayoutPanel` (`formatsPanel`, filled at runtime in `PopulateFormats()`) inside a `GroupBox` (`formatsGroupBox`) — *not* a `CheckedListBox`, which doesn't reliably announce toggle state changes to screen readers. The group box caption (rather than a separate label) supplies the accessible group name; each checkbox is its own tab stop. OK requires at least one format ticked; when all are ticked it saves `EnabledFormats` as empty so formats added in future versions show automatically.
 
 Tab page `Text` doesn't honor `&` mnemonics — navigate tabs with Ctrl+Tab / Ctrl+PgUp/Dn. Exposes `UpdatePeriodicCheckChanged` so `MainWindow` can re-arm the background update loop live (without a restart) when the frequency changes.
 
 ### Utilities (`src/Sic/Utils/`)
 
-- `Config.cs` — Static config manager using SharpConfig. Reads/writes `%APPDATA%/Oire/Sic/Sic.cfg` with a `[General]` section (Language, OutputFolder, LastInputFolder, ConfirmExitWithQueue, CheckForUpdatesOnStartup, UpdateCheckInterval, DetectClipboardData, EnabledFormats). `EnabledFormats` is a comma-separated list of SIC! format keys shown in the target dropdown (empty = all); parse it via `GetEnabledFormatKeys()` and filter with `ImageConverter.GetEnabledFormats(...)`. Accepts `isGui` parameter to route errors to MessageBox (GUI) or stderr (CLI).
+- `Config.cs` — Static config manager using SharpConfig. Reads/writes `%APPDATA%/Oire/Sic/Sic.cfg` with a `[General]` section (Language, OutputFolder, SaveToSourceFolder, LastInputFolder, ConfirmExitWithQueue, CheckForUpdatesOnStartup, UpdateCheckInterval, DetectClipboardData, EnabledFormats). `SaveToSourceFolder` (issue #33), when on, writes converted files next to each original instead of into `OutputFolder`; clipboard/URL items have no source folder and fall back to `OutputFolder`. `EnabledFormats` is a comma-separated list of SIC! format keys shown in the target dropdown (empty = all); parse it via `GetEnabledFormatKeys()` and filter with `ImageConverter.GetEnabledFormats(...)`. Accepts `isGui` parameter to route errors to MessageBox (GUI) or stderr (CLI).
 - `FileHelper.cs` — Cloud placeholder detection (OneDrive/SharePoint recall attributes) and image file enumeration with glob patterns.
 - `UrlHelper.cs` — Single source of truth for link validation: `IsValidHttpUrl(text, out url)` trims input and checks for an absolute http(s) URL. Used by the "Add by link" dialog, Ctrl+V paste, and clipboard auto-detection so all three validate links identically.
 - `Localization.cs` — Wraps GetText.NET with convenience methods: `_()`, `_n()`, `_p()`, `_pn()` for translations. Loads `.mo` files from the `locale/` folder relative to the executable. Falls back through language parents to `en-US`.
@@ -135,6 +135,7 @@ SIC! is an accessible image format converter primarily aimed at blind and low-co
 ### Settings (via SharpConfig, stored in `%APPDATA%/Oire/Sic/Sic.cfg`)
 
 - Output folder (default: `Converted` subfolder in the data directory)
+- Save converted images in the same folder as the original (`SaveToSourceFolder`, default: off) — when on, each converted file is written next to its source file instead of into the output folder (issue #33). Clipboard captures and downloaded links have no source folder, so they still go to the output folder.
 - Language
 - Confirm exit when images are in the queue
 - Check for updates on startup (default: enabled) — a single silent check shortly after launch

src/Sic/MainWindow.cs

@@ -476,7 +476,7 @@ await Task.Run(() => {
                         continue;
                     }
 
-                    var outputPath = ImageConverter.GenerateOutputPath(item, targetFormat, outputFolder);
+                    var outputPath = ImageConverter.GenerateOutputPath(item, targetFormat, outputFolder, Config.General.SaveToSourceFolder);
 
                     if (File.Exists(outputPath)) {
                         var resolution = ResolveFileConflict(outputPath);
@@ -594,7 +594,7 @@ private async void CreateMultiSizeIcoMenuItem_Click(object? sender, EventArgs e)
         var index = imageListView.SelectedIndices[0];
         var item = _imageItems[index];
         var outputFolder = ValidateOutputFolder();
-        var outputPath = ImageConverter.GenerateOutputPath(item, "ICO", outputFolder);
+        var outputPath = ImageConverter.GenerateOutputPath(item, "ICO", outputFolder, Config.General.SaveToSourceFolder);
 
         if (File.Exists(outputPath)) {
             var resolution = ResolveFileConflict(outputPath);

src/Sic/Services/ImageConverter.cs

@@ -316,14 +316,24 @@ public static string GetFileExtension(string format) {
         };
     }
 
-    public static string GenerateOutputPath(ImageItem item, string targetFormat, string outputFolder) {
+    public static string GenerateOutputPath(ImageItem item, string targetFormat, string outputFolder, bool saveToSourceFolder = false) {
+        var baseName = Path.GetFileNameWithoutExtension(item.FileName);
+        var extension = GetFileExtension(targetFormat);
+
+        // Write next to the original when requested (issue #33), but only for items that actually
+        // came from a file on disk. Clipboard captures and downloaded links have no source folder,
+        // so they fall through to the configured output folder below.
+        if (saveToSourceFolder && !string.IsNullOrWhiteSpace(item.FilePath)) {
+            var sourceDir = Path.GetDirectoryName(item.FilePath);
+            if (!string.IsNullOrWhiteSpace(sourceDir)) {
+                return Path.Combine(sourceDir, baseName + extension);
+            }
+        }
+
         if (string.IsNullOrWhiteSpace(outputFolder)) {
             outputFolder = App.DefaultOutputFolder;
         }
 
-        var baseName = Path.GetFileNameWithoutExtension(item.FileName);
-        var extension = GetFileExtension(targetFormat);
-
         if (item.BasePath != null && item.FilePath != null) {
             var relativePath = Path.GetRelativePath(item.BasePath, item.FilePath);
             var relativeDir = Path.GetDirectoryName(relativePath) ?? "";

src/Sic/SettingsDialog.cs

@@ -61,6 +61,7 @@ private void TabControl_Selected(object? sender, TabControlEventArgs e) {
 
     private void LoadSettings() {
         outputFolderTextBox.Text = Config.General.OutputFolder;
+        saveToSourceFolderCheckBox.Checked = Config.General.SaveToSourceFolder;
         confirmExitCheckBox.Checked = Config.General.ConfirmExitWithQueue;
         checkUpdatesOnStartupCheckBox.Checked = Config.General.CheckForUpdatesOnStartup;
         detectClipboardCheckBox.Checked = Config.General.DetectClipboardData;
@@ -219,6 +220,7 @@ private void OkButton_Click(object? sender, EventArgs e) {
         var oldUpdateInterval = Config.General.UpdateCheckInterval;
 
         Config.General.OutputFolder = folder;
+        Config.General.SaveToSourceFolder = saveToSourceFolderCheckBox.Checked;
         Config.General.ConfirmExitWithQueue = confirmExitCheckBox.Checked;
         Config.General.CheckForUpdatesOnStartup = checkUpdatesOnStartupCheckBox.Checked;
         Config.General.DetectClipboardData = detectClipboardCheckBox.Checked;

src/Sic/Utils/Config.cs

@@ -16,6 +16,13 @@ public class Config {
     public class SectionGeneral {
         public string Language { get; set; } = "System";
         public string OutputFolder { get; set; } = App.DefaultOutputFolder;
+
+        /// <summary>When <c>true</c>, converted files are written next to their source file
+        /// instead of into <see cref="OutputFolder"/> (issue #33). Items that have no source
+        /// folder — clipboard captures and downloaded links — still fall back to
+        /// <see cref="OutputFolder"/>. Opt-in; off by default.</summary>
+        public bool SaveToSourceFolder { get; set; }
+
         public string LastInputFolder { get; set; } = "";
         public bool ConfirmExitWithQueue { get; set; } = true;