Phase 2: wire decideLoopContinuation + classifyCompletionState

[Pterjudin]

Summary

• Route iteration-cap checks through decideLoopContinuation + shouldEscalateModel (replacing inline escalate/stop branch)
• Route post-tool-call continuation through decideLoopContinuation (replacing updateConsecutiveToolErrors inline path)
• Route _runToolCall outcomes through classifyCompletionState for interrupted/completion routing
• Preserve behavior for escalation messages and counter resets (including uniform post-escalation reset via computePostEscalationCounters)

Test plan

• npm run transpile-client
• npm run test-cortexide-qa — 255/255 (113 Phase 0/1 + 142 Phase 2)
• npm run buildreact
• Manual: agent mode with failing tools → verify escalation/halt messages still correct
• Manual: interrupt mid-tool → verify loop stops cleanly

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