Core Calculation & Display

updateTally()
→ Calculates totals (recurring & one-off) with exchange rates, frequency multipliers, and taxes, then updates the tally UI.

updateProgressBar()
→ Updates the progress bar width based on the current step.

showCompletionMessage()
→ Displays the "Questions Complete" message, hides the form, and saves state.

Answers & Comments Synchronization

updateTextareaAndTags()
→ Updates the comment textarea and clickable tag bubbles from selected answers.

syncCommentsToAnswers()
→ Parses textarea comments back into the answers array and updates UI accordingly.

onTextareaInput()
→ Input handler for textareas; keeps answers, tags, tally, and state in sync.

Step Navigation

updateNavButtons()
→ Enables/disables Next/Previous buttons based on progress and input.

showStep(index)
→ Displays the given form step, highlights selected answers, attaches listeners, restores custom buttons, and syncs UI.

State Management

saveWizardState()
→ Saves current answers, comments, and step index to localStorage.

loadWizardState()
→ Restores state from localStorage, including currency, frequency, and tally.

getAppState()
→ Reads app state safely from localStorage.

setAppState(state)
→ Writes app state safely to localStorage.

Event Bindings

Button click handlers:
→ For normal answers, multi-select logic, or custom "Other" input replacement.

Next button click → moves forward (or finishes).

Prev button click → moves backward.

Textarea handlers → sync with answers and trigger navigation on Enter.