[cedricvogel-leo]

P25 decision 1 (lean variant, address variant 3) and the «Neue Version verfügbar» notice. IDE PR 1 of 2; PR 2 brings libraries by URL and the notes for broken and long links.

The bump to glpython-editor v0.1.20 (the Monaco setting, glpython-edu/glpython-editor#42) follows as a commit on this branch once the tag exists. Nothing in this PR depends on it.

Behaviour

• One project per browser tab.
  • A share link starts a new tab project and never replaces another tab's work.
  • The address bar then shows only https://glpython-edu.github.io/, as in WebTigerPython.
• The tab's id is kept in session storage and history.state, never in the address.
  • Reload: both survive.
  • iPad Safari rebuilding an unloaded tab: history.state survives (your diagnostic, iPadOS 26.6.1).
  • Quitting Safari: neither survives, so the rescue offer below appears.
• Projects are kept in local storage, one entry per tab. Nothing is deleted when a tab goes away: a page can't tell a close from Safari unloading it.
• Unsaved means changed since the last «Teilen» or «Projekt herunterladen». A link's project and the untouched starter count as saved.
• Closing or reloading with unsaved changes: the browser's own question (its own text). Desktop browsers only; iPad Safari never asks.
• ⋮ «Zuletzt geschlossen» lists projects no open tab holds, from the last 14 days, most recent first, without untouched starters.
  • «Öffnen» opens one in this tab if it holds only the untouched starter, else in a new tab.
  • «Entfernen» deletes it. Projects older than 14 days are removed.
• Rescue offer: a new tab without a link offers the last project changed within 24 hours right away. «Alle anzeigen» appears if there are several; ✕ closes the offer. (You wrote «in the last hours»; I chose 24 h so a Safari or iPad restart overnight is still covered. Easy to change.)
• ⋮ «Neues Projekt» replaces «Lokales Projekt löschen» (and its «Entwicklerwerkzeuge» group). It gives the tab the starter. Opening a folder or a ZIP gives the tab that project. In both cases the previous project goes to «Zuletzt geschlossen»; nothing is deleted.
• A duplicated tab (same id as an open one) takes its own copy. Open tabs answer each other over a BroadcastChannel.
• Migration: today's single stored project becomes the first tab's project, once. It counts as unsaved.
• New version:
  • The build writes version.json (the commit).
  • An open tab checks it when it comes back into view and every 30 minutes.
  • On a difference: «Neue Version verfügbar.» with «Neu laden». The code survives the reload; Python's session doesn't.

New wording, please review

Where	de	en
⋮	Neues Projekt	New project
⋮, dialog title	Zuletzt geschlossen	Recently closed
dialog	Projekte aus geschlossenen Tabs, 14 Tage lang in diesem Browser gespeichert.	Projects of closed tabs, kept in this browser for 14 days.
dialog, empty	Keine geschlossenen Projekte aus den letzten 14 Tagen.	No projects closed in the last 14 days.
dialog, per project	auswerter.py · Auswerter · vor 2 Stunden · «Öffnen» · 🗑 «auswerter.py entfernen»	… · «Open» · «Remove auswerter.py»
offer	Zuletzt bearbeitet: auswerter.py (vor 2 Stunden). · «Öffnen» · «Alle anzeigen» · ✕ «Schliessen»	Last edited: auswerter.py (2 hours ago). · «Open» · «Show all» · ✕ «Close»
under a minute	gerade eben	just now
update notice	Neue Version verfügbar. · «Neu laden»	A new version is available. · «Reload»

Times come from Intl.RelativeTimeFormat («vor 5 Minuten», «gestern», «vor 3 Tagen»). Notices use the info colours (--glp-info).

Checked (Chrome against the production build, vite preview)

#	Case	Result
0	Fresh profile with an old single project	taken over; old key removed
1	Evaluator link in tab A	address is the bare /; id in session storage and history.state
2	Bare IDE in tab B	starter; no offer (A is open)
3	The same link again in tab C	scaffold; A keeps its work
4	Reload of A with unsaved work	one question; work kept
5	A with session storage cleared, then reload (the iPad unload case)	work kept
6	Duplicate of A	shows A's work with its own id; editing it leaves A unchanged
7	Closing A with unsaved work	question; after «Teilen», no question
8	Bare IDE after closing	«Zuletzt bearbeitet: auswerter.py (gerade eben).»; «Öffnen» opens it in place
9–10	«Neues Projekt» in C	starter; C's project in «Zuletzt geschlossen»
11	A different version.json, then the tab comes into view	«Neue Version verfügbar.»

Build and lint pass (lint: only the existing warnings in public/coi-serviceworker.js).

Headless Chrome doesn't close a tab after a cancelled close, even on a blank test page, so «closes after Teilen» needs your manual test.

Your tests

• Desktop Chrome:
  • Two links in two tabs stay independent.
  • Reload keeps the code.
  • Closing with changes asks; after «Teilen» or «Herunterladen» it doesn't.
  • ⋮ «Zuletzt geschlossen»: open, remove.
• iPad:
  • Edit, force an unload with the storage-check page's «Belastungsseite», return: the code is there.
  • Quit Safari and open the IDE: the «Zuletzt bearbeitet» offer, «Öffnen».
  • Close the tab and open the IDE again: the offer.
• After the merge: keep an IDE tab open on the iPad. After the next IDE deploy, return to it: «Neue Version verfügbar.»

Merging deploys the IDE.

🤖 Generated with Claude Code