♻️ refactor: migrate all remaining bots to shared services

Completed migration of all Matrix bots to @manacore/bot-services:

**SessionService (11 bots migrated):**
- matrix-chat-bot (with conversation/model mapping via setSessionData)
- matrix-contacts-bot
- matrix-skilltree-bot
- matrix-presi-bot
- matrix-questions-bot
- matrix-storage-bot
- matrix-planta-bot
- matrix-manadeck-bot
- matrix-nutriphi-bot (with pendingImage via setSessionData)
- matrix-picture-bot (previous commit)
- matrix-zitare-bot (previous commit)

**TranscriptionService (5 bots migrated):**
- matrix-todo-bot (previous commit)
- matrix-clock-bot (previous commit)
- matrix-zitare-bot (previous commit)
- matrix-nutriphi-bot
- matrix-project-doc-bot

**Code Reduction:**
- Deleted 22 local module files (session + transcription)
- ~1100 lines of duplicate code removed total
- All bots now share identical auth and STT logic

**Special handling:**
- matrix-chat-bot: Extended methods converted to setSessionData/getSessionData
- matrix-nutriphi-bot: pendingImage state via setSessionData
- matrix-project-doc-bot: TranscriptionService used by MediaService

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/matrix-skilltree-bot/src/app.module.ts

@@ -3,7 +3,6 @@ import { ConfigModule } from '@nestjs/config';
 import { HealthController } from './health.controller';
 import { BotModule } from './bot/bot.module';
 import { SkilltreeModule } from './skilltree/skilltree.module';
-import { SessionModule } from './session/session.module';
 import configuration from './config/configuration';
 
 @Module({
@@ -14,7 +13,6 @@ import configuration from './config/configuration';
 		}),
 		BotModule,
 		SkilltreeModule,
-		SessionModule,
 	],
 	controllers: [HealthController],
 })

services/matrix-skilltree-bot/src/bot/bot.module.ts

@@ -1,10 +1,10 @@
 import { Module } from '@nestjs/common';
 import { MatrixService } from './matrix.service';
 import { SkilltreeModule } from '../skilltree/skilltree.module';
-import { SessionModule } from '../session/session.module';
+import { SessionModule } from '@manacore/bot-services';
 
 @Module({
-	imports: [SkilltreeModule, SessionModule],
+	imports: [SkilltreeModule, SessionModule.forRoot()],
 	providers: [MatrixService],
 	exports: [MatrixService],
 })

services/matrix-skilltree-bot/src/bot/matrix.service.ts

@@ -6,7 +6,7 @@ import {
 	AutojoinRoomsMixin,
 } from 'matrix-bot-sdk';
 import { SkilltreeService, Skill, SkillBranch } from '../skilltree/skilltree.service';
-import { SessionService } from '../session/session.service';
+import { SessionService } from '@manacore/bot-services';
 import { HELP_MESSAGE } from '../config/configuration';
 
 @Injectable()

services/matrix-skilltree-bot/src/session/session.module.ts

@@ -1,8 +0,0 @@
-import { Module } from '@nestjs/common';
-import { SessionService } from './session.service';
-
-@Module({
-	providers: [SessionService],
-	exports: [SessionService],
-})
-export class SessionModule {}

services/matrix-skilltree-bot/src/session/session.service.ts

@@ -1,86 +0,0 @@
-import { Injectable, Logger } from '@nestjs/common';
-import { ConfigService } from '@nestjs/config';
-
-interface UserSession {
-	token: string;
-	email: string;
-	expiresAt: Date;
-}
-
-@Injectable()
-export class SessionService {
-	private readonly logger = new Logger(SessionService.name);
-	private sessions: Map<string, UserSession> = new Map();
-	private authUrl: string;
-
-	constructor(private configService: ConfigService) {
-		this.authUrl = this.configService.get<string>('auth.url') || 'http://localhost:3001';
-	}
-
-	async login(
-		matrixUserId: string,
-		email: string,
-		password: string
-	): Promise<{ success: boolean; error?: string }> {
-		try {
-			const response = await fetch(`${this.authUrl}/api/v1/auth/login`, {
-				method: 'POST',
-				headers: { 'Content-Type': 'application/json' },
-				body: JSON.stringify({ email, password }),
-			});
-
-			if (!response.ok) {
-				const errorData = await response.json().catch(() => ({}));
-				return {
-					success: false,
-					error: errorData.message || 'Authentifizierung fehlgeschlagen',
-				};
-			}
-
-			const data = await response.json();
-			const token = data.accessToken || data.token;
-
-			if (!token) {
-				return { success: false, error: 'Kein Token erhalten' };
-			}
-
-			this.sessions.set(matrixUserId, {
-				token,
-				email,
-				expiresAt: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000),
-			});
-
-			this.logger.log(`User ${matrixUserId} logged in as ${email}`);
-			return { success: true };
-		} catch (error) {
-			this.logger.error(`Login failed for ${matrixUserId}:`, error);
-			return {
-				success: false,
-				error: 'Verbindung zum Auth-Server fehlgeschlagen',
-			};
-		}
-	}
-
-	logout(matrixUserId: string): void {
-		this.sessions.delete(matrixUserId);
-		this.logger.log(`User ${matrixUserId} logged out`);
-	}
-
-	getToken(matrixUserId: string): string | null {
-		const session = this.sessions.get(matrixUserId);
-		if (!session) return null;
-		if (session.expiresAt < new Date()) {
-			this.sessions.delete(matrixUserId);
-			return null;
-		}
-		return session.token;
-	}
-
-	isLoggedIn(matrixUserId: string): boolean {
-		return this.getToken(matrixUserId) !== null;
-	}
-
-	getSessionCount(): number {
-		return this.sessions.size;
-	}
-}