feat: v1.2.0-rc.1 - IndieWeb Features Release Candidate

Complete implementation of v1.2.0 "IndieWeb Features" release.

## Phase 1: Custom Slugs
- Optional custom slug field in note creation form
- Auto-sanitization (lowercase, hyphens only)
- Uniqueness validation with auto-numbering
- Read-only after creation to preserve permalinks
- Matches Micropub mp-slug behavior

## Phase 2: Author Discovery + Microformats2
- Automatic h-card discovery from IndieAuth identity URL
- 24-hour caching with graceful fallback
- Never blocks login (per ADR-061)
- Complete h-entry, h-card, h-feed markup
- All required Microformats2 properties
- rel-me links for identity verification
- Passes IndieWeb validation

## Phase 3: Media Upload
- Upload up to 4 images per note (JPEG, PNG, GIF, WebP)
- Automatic optimization with Pillow
  - Auto-resize to 2048px
  - EXIF orientation correction
  - 95% quality compression
- Social media-style layout (media top, text below)
- Optional captions for accessibility
- Integration with all feed formats (RSS, ATOM, JSON Feed)
- Date-organized storage with UUID filenames
- Immutable caching (1 year)

## Database Changes
- migrations/006_add_author_profile.sql - Author discovery cache
- migrations/007_add_media_support.sql - Media storage

## New Modules
- starpunk/author_discovery.py - h-card discovery and caching
- starpunk/media.py - Image upload, validation, optimization

## Documentation
- 4 new ADRs (056, 057, 058, 061)
- Complete design specifications
- Developer Q&A with 40+ questions answered
- 3 implementation reports
- 3 architect reviews (all approved)

## Testing
- 56 new tests for v1.2.0 features
- 842 total tests in suite
- All v1.2.0 feature tests passing

## Dependencies
- Added: mf2py (Microformats2 parser)
- Added: Pillow (image processing)

Version: 1.2.0-rc.1

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

starpunk/routes/admin.py

@@ -75,23 +75,72 @@ def create_note_submit():
     Form data:
         content: Markdown content (required)
         published: Checkbox for published status (optional)
+        custom_slug: Optional custom slug (v1.2.0 Phase 1)
+        media_files: Multiple file upload (v1.2.0 Phase 3)
+        captions[]: Captions for each media file (v1.2.0 Phase 3)
 
     Returns:
         Redirect to dashboard on success, back to form on error
 
     Decorator: @require_auth
     """
+    from starpunk.media import save_media, attach_media_to_note
+
     content = request.form.get("content", "").strip()
     published = "published" in request.form
+    custom_slug = request.form.get("custom_slug", "").strip()
 
     if not content:
         flash("Content cannot be empty", "error")
         return redirect(url_for("admin.new_note_form"))
 
     try:
-        note = create_note(content, published=published)
+        # Create note first (per Q4)
+        note = create_note(
+            content,
+            published=published,
+            custom_slug=custom_slug if custom_slug else None
+        )
+
+        # Handle media uploads (v1.2.0 Phase 3)
+        media_files = request.files.getlist('media_files')
+        captions = request.form.getlist('captions[]')
+
+        if media_files and any(f.filename for f in media_files):
+            # Per Q35: Accept valid, reject invalid (not atomic)
+            media_ids = []
+            errors = []
+
+            for i, file in enumerate(media_files):
+                if not file.filename:
+                    continue
+
+                try:
+                    # Read file data
+                    file_data = file.read()
+
+                    # Save and optimize media
+                    media_info = save_media(file_data, file.filename)
+                    media_ids.append(media_info['id'])
+                except ValueError as e:
+                    errors.append(f"{file.filename}: {str(e)}")
+                except Exception as e:
+                    errors.append(f"{file.filename}: Upload failed")
+
+            if media_ids:
+                # Ensure captions list matches media_ids length
+                while len(captions) < len(media_ids):
+                    captions.append('')
+
+                # Attach media to note
+                attach_media_to_note(note.id, media_ids, captions[:len(media_ids)])
+
+            if errors:
+                flash(f"Note created, but some images failed: {'; '.join(errors)}", "warning")
+
         flash(f"Note created: {note.slug}", "success")
         return redirect(url_for("admin.dashboard"))
+
     except ValueError as e:
         flash(f"Error creating note: {e}", "error")
         return redirect(url_for("admin.new_note_form"))