Sync IRIS-AI model and almanac updates

fix: sync dynamic headlines height alignment and refresh frontend cache

fix: sync headlines scroll constraints and bump css cache

fix: sync dashboard spacing optimization from localhost

Sync localhost changes after aa6da6b into demo

fix: add light mode text color overrides for recommendation section

feat: add Recommended For You section with related stock tickers

fix: widen ticker search box to fully display placeholder text

fix: redesign clear button as subtle inline circular icon

fix: float autocomplete dropdown above dashboard with glass transparency effect

fix: align dashboard card grid to 3-column layout with spanning headlines card

feat: add comprehensive error codes, edge case handling, and graceful degradation

feat: add ticker autocomplete with local database prefix search

feat: wire end-to-end validation flow with error banners and loading states

feat: add instant frontend ticker validation with debounced API verification

Sync mobile responsive CSS from IRIS-AI

style: improve headlines layout — spacing, hierarchy, tag pills, scroll hint

Fix: flatten grid to 325px spec, restore noise pre-filter, add scroll hint

feat: cap headlines panel at 5 entries, add geo/macro category tags

Sync CSS: 3-col grid, headline item styles, overflow fixes, trend colours

Initial push of IRIS stakeholder demo UI and backend