feat: named image references and annotate command (#147)

* feat: named image references and annotate command (#67, #109)

Add human-readable names to image attachments throughout the annotation
pipeline, and add a new `plannotator annotate <file.md>` command for
annotating arbitrary markdown files.

Image names: ImageAttachment type replaces plain string paths, upload
endpoints return originalName, editable name inputs under thumbnails,
[name] path format in exported feedback, backward-compatible sharing.

Annotate command: new server module reusing plan editor HTML with
mode:"annotate", CLI subcommand, slash commands for Claude Code and
OpenCode, annotate mode UI (hides Approve, shows Send Annotations).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: move image name input to ImageAnnotator screen

The name input now appears on the full-screen annotator modal that opens
immediately when uploading/pasting an image, pre-populated from the
filename. Removes the disruptive inline name editing from thumbnails.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: stale closure in paste handler, update CLAUDE.md for new features

Fix race condition where globalAttachments was captured as empty array
in the paste event listener (missing dependency). Also update CLAUDE.md
to document ImageAttachment type, annotate server/flow, updated sharing
format with image support, and new slash commands.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/review.ts

@@ -200,7 +200,7 @@ export async function startReviewServer(
               const tempPath = `${tempDir}/${crypto.randomUUID()}.${ext}`;
 
               await Bun.write(tempPath, file);
-              return Response.json({ path: tempPath });
+              return Response.json({ path: tempPath, originalName: file.name });
             } catch (err) {
               const message =
                 err instanceof Error ? err.message : "Upload failed";