fix: delete agent 500 error + dynamic personality + deployment guide

- Fix delete agent 500: clean up FK records (agent_llm_logs, permissions,
  schedules, executions, team_members) and unbind goals/tasks before delete
- Remove hardcoded personality templates in Android, replace with dynamic
  system prompt generation from name + description
- Set promptSectionsEnabled=false to bypass PromptComposer for personality
- Add Tencent Cloud Linux deployment guide (Docker Compose)
- Accumulated backend service updates, frontend UI fixes, Android app changes

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

_start_api.ps1

@@ -0,0 +1,19 @@
+$env:PYTHONPATH = 'D:\aaa\aiagent\backend'
+$proc = Start-Process -FilePath 'D:\aaa\aiagent\backend\venv\Scripts\python.exe' `
+  -ArgumentList '-m', 'uvicorn', 'app.main:app', '--host', '0.0.0.0', '--port', '8037' `
+  -WorkingDirectory 'D:\aaa\aiagent\backend' `
+  -WindowStyle Hidden `
+  -RedirectStandardOutput 'D:\aaa\aiagent\logs\api_stdout.log' `
+  -RedirectStandardError 'D:\aaa\aiagent\logs\api_stderr.log' `
+  -PassThru
+Write-Host "API PID: $($proc.Id)"
+Start-Sleep -Seconds 5
+$listening = netstat -ano | Select-String ":8037.*LISTENING"
+if ($listening) {
+  Write-Host "SUCCESS: API is listening on port 8037"
+} else {
+  Write-Host "WARNING: API not yet listening, checking stderr..."
+  if (Test-Path 'D:\aaa\aiagent\logs\api_stderr.log') {
+    Get-Content 'D:\aaa\aiagent\logs\api_stderr.log' -Tail 10
+  }
+}