Claude/fix tick engine v16wt (#165)

* fix: wire up tick engine scheduler + add journal + systemd timer

The ThinkingEngine was fully implemented but never called — the background
scheduler was lost during the Celery removal in #133. This commit:

- Add _thinking_scheduler() to dashboard lifespan (5-min cycle)
- Add _write_journal() that appends thoughts to data/journal/YYYY-MM-DD.md
- Add `timmy tick` CLI command for one-shot thinking (systemd-friendly)
- Add deploy/timmy-tick.{service,timer} systemd units

https://claude.ai/code/session_013e7upfJ6negFzu5YNJikge

* Add macOS launchd plist for Timmy tick timer

Equivalent of the existing systemd service/timer for Linux.
Runs `timmy tick` every 5 minutes via launchd on macOS.

https://claude.ai/code/session_013e7upfJ6negFzu5YNJikge

* fix: make macOS launchd timer work with user-local paths

The plist had hardcoded /opt/timmy paths that don't exist on Mac.
Now uses a template with __PROJECT_DIR__ placeholders, a wrapper
script for PATH setup, and an install script that wires it all up.

Usage: ./deploy/install-mac-timer.sh

https://claude.ai/code/session_013e7upfJ6negFzu5YNJikge

* fix: add missing tox pre-commit env + pre-push hook to prevent broken builds

RCA: the pre-commit hook referenced `tox -e pre-commit` which didn't
exist in tox.ini, so commits went unchecked. There was also no
pre-push hook, so broken code could reach GitHub without running
the CI-mirror suite.

- Add [testenv:pre-commit] to tox.ini (format check + unit tests)
- Add .githooks/pre-push that runs `tox -e pre-push` (full CI mirror)

https://claude.ai/code/session_013e7upfJ6negFzu5YNJikge

---------

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

tox.ini

@@ -145,6 +145,22 @@ commands =
         -p no:xdist \
         -m "not ollama and not docker and not selenium and not external_api"
 
+# ── Pre-commit (fast local gate) ────────────────────────────────────────────
+
+[testenv:pre-commit]
+description = Fast pre-commit gate — format check + unit tests (30s budget)
+deps =
+    black
+    isort
+commands =
+    black --check --line-length 100 src/ tests/
+    isort --check-only --profile black --line-length 100 src/ tests/
+    pytest tests/ -q --tb=short \
+        --ignore=tests/e2e \
+        --ignore=tests/functional \
+        -m "not ollama and not docker and not selenium and not external_api and not skip_ci" \
+        -n auto --dist worksteal
+
 # ── Dev Server ───────────────────────────────────────────────────────────────
 
 [testenv:dev]