Add Web Push, guided start screen, SVG icons, chunked uploads, rename

- Web Push (VAPID + RFC 8291, pure Rust): permission/question/finished
  notifications while no app window is visible; settings with test button
- Guided new-session flow: task, craft target (website/app/game/old
  software/fresh), clean room or deep, description, model, folder
  (new, existing or cloned git repository); originals upload to original/
- Craft phase bar (craft_phase tool) for study/specify/build/check/ready
- Chunked uploads (8 MB) up to server.max_upload_mb (default 500 MB)
- All UI glyphs and emojis replaced by themeable SVG icons
- Rename dialog with manual name or model-generated suggestion

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/resources/commands/recreate-start.md

@@ -5,6 +5,6 @@ clean_room: false
 ---
 Load the skill "recreate" with the skill tool and carry out phases 1–4 for the software in
 original/ (inventory and unpacking, analysis, documentation and specification, proposal).
-Track the phases with todo_write. Stop after the proposal and ask the user how to proceed.
+Report the workflow phase with craft_phase (study while taking inventory and analysing, specify while documenting and writing the proposal) and track the steps inside a phase with todo_write. Stop after the proposal and ask the user how to proceed.
 
 Additional notes from the user: $ARGUMENTS