feat: add slides generation tool with multiple slide types

- Add slides.tool.ts with support for title, bullets, chart, stats, table, cards, timeline, quote, comparison, equation, image, summary slide types
- Chart types: bar, horizontal-bar, line, donut, radar
- Integrate with agent executor and canvas system
- Add multilingual support (en/fr)
- Various UI improvements and bug fixes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

memento-note/lib/types/presentation.ts

@@ -0,0 +1,67 @@
+/**
+ * Shared types for the Presentation / Slides system.
+ * Used by both the server-side tool (slides.tool.ts) and the client renderer (slides-renderer.tsx).
+ */
+
+export interface SlideChart {
+  type: 'bar' | 'line' | 'area' | 'pie' | 'radar' | 'waterfall' | 'funnel' | 'combo' | 'stacked-bar' | 'gauge' | 'treemap'
+  data: Array<Record<string, string | number>>
+  /** Key in data objects used for the X-axis / labels (defaults to "name") */
+  xKey?: string
+  /** Keys for data series. Defaults to all keys except xKey */
+  yKeys?: string[]
+  colors?: string[]
+  showLegend?: boolean
+  showGrid?: boolean
+  /** For combo charts: which yKeys to render as lines (others as bars) */
+  lineKeys?: string[]
+  /** For gauge: target value (0-100) */
+  gaugeValue?: number
+  /** For gauge: label below the value */
+  gaugeLabel?: string
+}
+
+export interface SlideSpec {
+  title: string
+  subtitle?: string
+  /** Bullet points, stat values, card items, etc. */
+  content: string[]
+  layout?: 'title' | 'content' | 'section' | 'two-column' | 'cards' | 'stats' | 'quote' | 'toc' | 'summary' | 'image' | 'chart' | 'diagram' | 'timeline' | 'kpi-dashboard' | 'data-table'
+  imageUrl?: string
+  /** Speaker notes / talking points for the presenter (2-3 sentences) */
+  notes?: string
+  /** Recharts-compatible chart spec — used with layout="chart" */
+  chart?: SlideChart
+  /** Mermaid diagram source — used with layout="diagram" */
+  mermaid?: string
+  /** react-icons identifier e.g. "FaRocket" — decorative icon */
+  icon?: string
+  /** For data-table layout: column headers */
+  tableHeaders?: string[]
+  /** For data-table layout: rows of data (each row is array of cell values) */
+  tableRows?: string[][]
+}
+
+/** Executive presentation template types */
+export type SlideTemplate = 'auto' | 'board-update' | 'project-status' | 'strategy-review' | 'quarterly-results'
+
+export interface PresentationSpec {
+  title: string
+  slides: SlideSpec[]
+  /** Palette key — one of the PALETTES keys or alias */
+  theme?: string
+  /** "sharp" | "brutalist" | "creative" | "rounded" | "pill" — affects border radius */
+  style?: string
+  author?: string
+  /** Executive template used for structure guidance */
+  template?: SlideTemplate
+}
+
+export interface Palette {
+  primary: string
+  secondary: string
+  accent: string
+  light: string
+  bg: string
+  isDark: boolean
+}