fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

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

backend/state_engine/__init__.py

@@ -0,0 +1,43 @@
+"""
+State Engine - Herzstück des BreakPilot Begleiter-Modus.
+
+Komponenten:
+1. Schuljahres-State-Machine (Phasen)
+2. Antizipations-Engine (Regeln + Vorschläge)
+3. TeacherContext (Aggregierter Kontext)
+"""
+
+from .models import (
+    SchoolYearPhase,
+    PhaseInfo,
+    TeacherContext,
+    ClassSummary,
+    Event,
+    TeacherStats,
+    Milestone,
+    PHASE_INFO,
+    get_phase_info
+)
+from .rules import Rule, Suggestion, SuggestionPriority, RULES
+from .engine import AnticipationEngine, PhaseService
+
+__all__ = [
+    # Models
+    "SchoolYearPhase",
+    "PhaseInfo",
+    "TeacherContext",
+    "ClassSummary",
+    "Event",
+    "TeacherStats",
+    "Milestone",
+    "PHASE_INFO",
+    "get_phase_info",
+    # Rules
+    "Rule",
+    "Suggestion",
+    "SuggestionPriority",
+    "RULES",
+    # Engine
+    "AnticipationEngine",
+    "PhaseService",
+]