Reviewer follow-up on Task 12: the task's own title/brief called for
batch support and no later task in the plan picks it up, so this closes
that gap. Adds a "Single File" / "Batch Folder" mode toggle to the
existing media-operations-dialog.js; batch mode swaps the per-file
input/output fields for an Input Folder + "Include subfolders" +
Output Folder trio while keeping every other parameter (width/height/
quality/angle/startTime/duration/crf/fps/format/fit) applied uniformly
to every matching file. Disabled for audio "Merge", which combines many
inputs into one output and doesn't fit a per-file batch model.
main.js: adds collectFilesByExtension() (src/main/collectFilesByExtension.js,
unit tested), a generalization of the inline collectFiles() closure inside
ipcMain.on('universal-convert-batch', ...) to match a set of extensions
instead of one format. runMediaBatchOperation() loops
ImageOperations/AudioOperations/VideoOperations.executeOperation() over
the matched files, reporting per-file progress via new
'media-batch-progress' events and a final 'media-batch-complete' event,
then shows a "Batch Conversion Complete" dialog.showMessageBox with
completed/failed counts, mirroring performBatchConversion()'s pattern.
Wired via three new ipcMain.on handlers: batch-image-operation,
batch-audio-operation, batch-video-operation.
preload.js: whitelists the three new send channels and the two new
receive channels (media-batch-progress, media-batch-complete).
Adds Tools > Image/Audio/Video Tools... menu items and a single dynamic
renderer dialog (src/renderer/media-operations-dialog.js) that lets the
user pick a media-kind-scoped operation, fill in its operation-specific
fields, and invoke process-image-operation/process-audio-operation/
process-video-operation (Tasks 9-11's backends). File selection reuses
the existing <input type="file"> + file.path convention; the one folder
picker need (video frame extraction) reuses the existing generic
select-folder/folder-selected IPC channels, so no new IPC handler was
required. Also removes the three dead electronAPI.image/audio/video
convenience blocks from preload.js (stale pre-Task-9-11 channel names,
unused everywhere).
amitwh