fix: progress modal phase tracking and UI improvements

[Dongbumlee]

• Fix missing 'import re' in orchestrator_base.py causing silent NameError
• Update regex to match new instruction format 'Phase X : Phase Title - '
• Update all 4 coordinator prompts with consistent phase format in instruction field
• Fix progress bar using apiData.step instead of apiData.phase (sub-phase overwrites broke indexOf)
• Fix redundant phase labels: show step name as category, phase as sub-detail
• Redesign Current Activity section with multi-line agent cards
• Show detailed action labels (Thinking, Speaking, Invoking Tool, Analyzing)
• Add step-level elapsed timer from step_timings
• Add update_phase() to TelemetryManager for sub-phase UI updates
• Fix step timing seed to always initialize on step start

Purpose

• ...

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

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