feat: IMAP mail sync with thread-to-contact matching (PRD §6.1)

Real IMAP connection via imapflow library:
- Connects to IMAP server (IMAPFlow, TLS on port 993)
- Fetches recent messages (configurable limit, default 20)
- Extracts: from, fromEmail, subject, date, snippet (200 chars)
- Thread-to-contact matching (PRD §6.1):
  1. Match sender email against persons table
  2. If no person match, extract domain and match against company.website
  3. Returns matchedCompany + matchedPerson for each email
- Audit-logged (action: crm.mailsync:imap)
- Zod validated (host, port, user, password, folder, limit)
- 502 on IMAP connection failure with detail
- 400 on validation failure

Tested: invalid creds → 502 'IMAP connection failed', missing host → 400

skills/experiment-suite/figure_examples/style_kit.py

@@ -0,0 +1,102 @@
+"""Shared publication-style helpers for experiment-suite figures."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import matplotlib.pyplot as plt
+
+
+PALETTE = {
+    "blue_main": "#0F4D92",
+    "blue_secondary": "#3775BA",
+    "green_1": "#DDF3DE",
+    "green_2": "#AADCA9",
+    "green_3": "#8BCF8B",
+    "red_1": "#F6CFCB",
+    "red_2": "#E9A6A1",
+    "red_strong": "#B64342",
+    "neutral_light": "#CFCECE",
+    "neutral_mid": "#767676",
+    "neutral_dark": "#4D4D4D",
+    "neutral_black": "#272727",
+    "teal": "#42949E",
+    "violet": "#9A4D8E",
+}
+
+DEFAULT_COLORS = [
+    PALETTE["blue_main"],
+    PALETTE["green_3"],
+    PALETTE["red_strong"],
+    PALETTE["teal"],
+    PALETTE["violet"],
+    PALETTE["neutral_mid"],
+]
+
+PALETTE_NMI_PASTEL = [
+    "#484878",
+    "#7884B4",
+    "#B4C0E4",
+    "#E4E4F0",
+    "#E4CCD8",
+    "#F0C0CC",
+]
+
+
+def apply_publication_style(font_size: int = 9, axes_linewidth: float = 0.6) -> None:
+    """Apply a shared journal-style matplotlib configuration."""
+    plt.rcParams.update({
+        "font.family": "sans-serif",
+        "font.sans-serif": ["Arial", "DejaVu Sans", "Liberation Sans"],
+        "font.size": font_size,
+        "axes.labelsize": font_size,
+        "axes.titlesize": font_size + 1,
+        "xtick.labelsize": max(font_size - 1, 6),
+        "ytick.labelsize": max(font_size - 1, 6),
+        "legend.fontsize": max(font_size - 1, 6),
+        "axes.spines.right": False,
+        "axes.spines.top": False,
+        "axes.linewidth": axes_linewidth,
+        "axes.grid": True,
+        "grid.alpha": 0.25,
+        "grid.linewidth": 0.4,
+        "lines.linewidth": 1.4,
+        "lines.markersize": 4.5,
+        "savefig.dpi": 300,
+        "savefig.bbox": "tight",
+        "svg.fonttype": "none",
+        "pdf.fonttype": 42,
+        "ps.fonttype": 42,
+    })
+
+
+def add_panel_label(ax, label: str, x: float = -0.12, y: float = 1.03) -> None:
+    ax.text(
+        x, y, label,
+        transform=ax.transAxes,
+        fontsize=10,
+        fontweight="bold",
+        ha="left",
+        va="bottom",
+    )
+
+
+def add_simulated_watermark(ax, x: float = 0.99, y: float = 0.02) -> None:
+    ax.text(
+        x, y, "simulated",
+        transform=ax.transAxes,
+        ha="right",
+        va="bottom",
+        fontsize=7,
+        color="gray",
+        alpha=0.7,
+        style="italic",
+    )
+
+
+def save_publication_bundle(fig, out_base: str, dpi: int = 600) -> None:
+    """Save PDF/SVG/TIFF together when possible."""
+    out_path = Path(out_base)
+    fig.savefig(out_path.with_suffix(".pdf"))
+    fig.savefig(out_path.with_suffix(".svg"))
+    fig.savefig(out_path.with_suffix(".tiff"), dpi=dpi)