feat: sync with upstream — v1.2.0, in-app updates, Projects, modules

Brings the public tree back in line with the development repo after several
weeks of drift caused by a stale publish include list.

New:
- In-app update path: GET /update/check compares the checkout against
  origin/main and POST /update/apply runs `ncp upgrade` detached (pull,
  rebuild, restart). The sidebar shows the version, checks on click, and
  offers an "update available" pill.
- Projects: a project workspace groups chats and RAG documents, with
  per-project instructions and document retrieval scoped to the active
  project. Replaces the standalone Documents page.
- modules/: auto-discovered feature plugins (mail, network) with their
  frontend counterparts and tests.
- Memory curation runs in-process (synapse/memory/curator.py) on the chat
  model when a conversation goes idle. The separate memory service on :8001
  is gone, along with the launcher lines that started it.

Also: the KDE theme, panel and Promethean terminal assets, the full test
suite, and VERSION 1.2.0.

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

synapse/playbook_manager.py

@@ -2,30 +2,28 @@ from typing import List
 from .playbooks.store import playbook_store, PlaybookItem
 
 
-class PlaybookManager:
-    @classmethod
-    def _all(cls) -> List[PlaybookItem]:
-        """Return all playbooks sorted by order (position 0 is always main)."""
-        return playbook_store.all_playbooks()
+def _all() -> List[PlaybookItem]:
+    """Return all playbooks sorted by order (position 0 is always main)."""
+    return playbook_store.all_playbooks()
 
-    @classmethod
-    def get_main_playbook(cls) -> PlaybookItem | None:
-        playbooks = cls._all()
-        return playbooks[0] if playbooks else None
 
-    @classmethod
-    def get_context_playbooks(cls) -> List[PlaybookItem]:
-        """All playbooks after the first — injected as reference context."""
-        playbooks = cls._all()
-        return playbooks[1:] if len(playbooks) > 1 else []
+def get_main_playbook() -> PlaybookItem | None:
+    playbooks = _all()
+    return playbooks[0] if playbooks else None
 
-    @classmethod
-    def get_system_prompt(cls) -> str:
-        playbook = cls.get_main_playbook()
-        if not playbook:
-            return ""
-        goal = (getattr(playbook, "goal", "") or "").strip()
-        instructions = (getattr(playbook, "instructions", "") or "").strip()
-        if goal and instructions:
-            return f"{goal}\n\n{instructions}"
-        return goal or instructions
+
+def get_context_playbooks() -> List[PlaybookItem]:
+    """All playbooks after the first — injected as reference context."""
+    playbooks = _all()
+    return playbooks[1:] if len(playbooks) > 1 else []
+
+
+def get_system_prompt() -> str:
+    playbook = get_main_playbook()
+    if not playbook:
+        return ""
+    goal = (getattr(playbook, "goal", "") or "").strip()
+    instructions = (getattr(playbook, "instructions", "") or "").strip()
+    if goal and instructions:
+        return f"{goal}\n\n{instructions}"
+    return goal or instructions