Define Finding Detail interaction

ui/SCREEN_FINDING_DETAIL.md

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+Screen: Finding Detail
+
+Entry:
+- Opened from Findings Table
+- Appears as side panel or modal (not full navigation)
+
+Content:
+- Summary at top
+- Severity and confidence clearly visible
+- Source and timestamp metadata
+- Raw data section (collapsible)
+- Actions section at bottom
+
+Behavior:
+- No blocking animations
+- Panel opens quickly
+- Closing returns focus to table
+
+Rule:
+All actions must trace back to the finding.