Add dev CI/CD pipeline deploying to a LAN server (#6)

* Weekly page: no-rain visuals adopt the dry-streak look

On the Weekly page, no-rain (0") days now warm with the dry-streak ramp
(tan→red, deepening to a 14-day cap) instead of a flat blue/tan, matching
the Dry chart and calendar's dry-period language:

- Precip trend chart: no-rain day dots colored by drynessColor(dsr).
- "Daily, graded" timeline strip: Rain-row dry cells tinted by dsr via a
  new optional color override on rdCell.

Rain days keep their intensity-tier colors; unknown streaks fall back to
the prior flat color, so nothing regresses.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019VP23wKmjS2ozk1g5a9g1Z

* Calendar totals: compact per-category status lines

Replace the stacked share bar + labeled percentage chips above the
calendar grid with a compact deviation strip: one thin status-colored
line per category (height scaled to the tallest non-median category),
with each share printed above it in that category's own status color.

The median tier — the neutral "Normal" center of the diverging
temperature scale — draws no line, just a faint baseline tick, so it
reads as the reference the other categories deviate from. Precip and
dry-streak have no natural median, so every category there keeps a line.

Percentage text is lifted toward the theme text color (color-mix) so
even the darkest/lightest tiers stay legible in both light and dark.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Calendar totals strip: wider bars, 0.1%-precision small shares (#5)

Widen the per-category deviation bars (3px→10px) so each reads
clearly, and print sub-1% shares as e.g. "0.4%" instead of "<1%".


Claude-Session: https://claude.ai/code/session_019VP23wKmjS2ozk1g5a9g1Z

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

* Weekly timeline: label dry streak instead of a dot

On the precip row of the recent/forecast timeline, dry days now show the
running dry-streak count ("3d" = 3 days since measurable rain), tinted by
the same dryness ramp as the chart, rather than a bare "·".

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Add dev CI/CD pipeline deploying to a LAN server

PRs into dev run a build + boot/health check, auto-merge on green, and
deploy the merged branch to a self-hosted runner on the LAN box, which
runs the app as a sudo-free systemd --user service on 0.0.0.0:8137.

- ci-cd.yml: build -> auto-merge -> deploy (self-hosted)
- deploy-dev.yml: deploy on direct pushes / manual dispatch
- deploy-dev.sh + thermograph-dev.service + provision-dev-lan.sh
- CLAUDE.md: dev is the PR base branch; commit/PR message conventions
- DEPLOY-DEV.md: pipeline docs

* Match runner service name in docs to the installed user unit

* Pin CI Python to 3.12 for prebuilt pyarrow/pandas wheels

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

deploy/thermograph-dev.service

@@ -0,0 +1,20 @@
+# systemd --user unit for the Thermograph LAN dev server.
+# Installed by deploy/deploy-dev.sh into ~/.config/systemd/user/ with the
+# @PLACEHOLDER@ tokens substituted for this machine's paths/port.
+# Runs sudo-free as your own user; linger keeps it up across logout/reboot.
+[Unit]
+Description=Thermograph (dev, LAN) - FastAPI/uvicorn
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=exec
+WorkingDirectory=@APP_DIR@/backend
+Environment=THERMOGRAPH_BASE=@BASE@
+# Bind all interfaces so other devices on the LAN (e.g. your phone) can reach it.
+ExecStart=@APP_DIR@/.venv/bin/uvicorn app:app --host 0.0.0.0 --port @PORT@
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=default.target