aisman

Direct session 64, Step 2:Complete output JSON compliance fields:
- Bug: session detail HTML corruption — second step and #sessionSubCreated absorbed into step 1's body
- Bug: addStepToRenderedSession corrupts the session cache with a partial summary object
- Bug: addStepToRenderedSession does not update the step count badge after appending a step
- Bug: accordion handler accumulation — wireSessionDetailHandlers adds duplicate click handlers on every addStepToRenderedSession call
- CSS/JS: replace aim-step-panes / aim-step-continuous with .aim-detail-tab-content / .continuous-mode
- SCSS: consolidate fragmented .aim-detail-tab-content.continuous-mode definitions in dashboard.scss