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/references/04b-figure-qa.md

@@ -0,0 +1,54 @@
+# Figure QA For Experiment Packages
+
+Use this before delivery or before passing figures to `paper-writer`.
+
+## Export bundle
+
+The ideal bundle per figure is:
+
+- `<basename>.pdf` for paper reuse
+- `<basename>.svg` for editable vector text
+- `<basename>.tiff` for journal upload when needed
+- `make_<basename>.py` as the source of truth
+
+If the environment cannot produce all three, keep PDF mandatory and note the limitation.
+
+## Editable-text rules
+
+For matplotlib-based figures:
+
+```python
+plt.rcParams["svg.fonttype"] = "none"
+plt.rcParams["pdf.fonttype"] = 42
+plt.rcParams["ps.fonttype"] = 42
+```
+
+This keeps SVG text editable and PDF text embedded.
+
+## Minimum QA checklist
+
+- Figure title / axes / legend readable at final size
+- No legend overlapping the data
+- No default matplotlib color cycle
+- Panel labels consistent across figures
+- Simulated watermark present iff the run is simulated
+- Figure caption can stand alone in the report
+- Statistics in the caption or surrounding prose define mean/std/CI and seed count
+
+## For image-based experiment figures
+
+If the figure contains microscopy, pathology, blots, or spatial overlays, also record:
+
+- raw image source
+- crop
+- brightness/contrast handling
+- scale-bar presence
+- whether pseudo-coloring was applied
+
+## Anti-patterns
+
+- 3-D bars
+- pie charts for quantitative comparison
+- saturated rainbow heatmaps without justification
+- repeated legends in every panel
+- simulated figures without visible disclosure