feat: add goals, drives, affect state, predictions and curiosity

Phase 9. Goals form a mind-scoped tree with kind, priority, progress and
blockers; their deterministic relevance to a candidate feeds the
goal_relevance attention feature and a goal monitor raises stalled goals
and observations that touch one. Drives are a closed set of eight
scalars with operator-configured ranges and personality-derived
baselines; there is no self-preservation, replication or acquisition
drive and no way to add one at runtime. Affect is ten scalars moved by an
explicit rule table over events and decaying towards baseline; both
modulate attention weights each cycle and the effective weights are
recorded with every cycle and shown beside the configured ones.

Predictions carry a window and machine-checkable criteria (event terms
occurring or staying absent, a belief reaching a confidence, or operator
judgement). A resolver job judges them deterministically, keeps an
append-only outcome history for calibration (accuracy, Brier score,
confidence buckets, overconfidence flag), emits prediction_error events
scaled by how confident the miss was, and feeds the outcome back into the
linked belief as evidence. Causal hypotheses derive predictions
automatically. Curiosity turns misses, contradictions and unexplained
observations into questions that compete for attention and become
investigation goals when admitted.

Brain gains after-cycle hooks and goal/motivation state. API, UI (goals,
prediction dashboard, cognitive state panel, effective weights) and CLI
(goal, prediction, state). Demo scenario 4 verified end to end.

web/templates/partials/state_panel.html

@@ -0,0 +1,14 @@
+{{define "state_panel"}}{{$s := .State}}{{$m := .Mind}}
+<div class="card">
+  <h2>Cognitive state <span class="muted small">scalars updated by rule; not a claim of feeling</span></h2>
+  <div class="grid cols-2 tight">
+    <div><h3>Affect</h3>
+      {{range $k, $v := (affectMap $s.Affect)}}<div class="dim"><span class="dim-name">{{title $k}}</span><span class="dim-bar {{if eq $k "valence"}}bipolar{{end}}"><i style="{{if eq $k "valence"}}left:{{pct (valencePos $v)}};width:{{pct (valenceWidth $v)}}{{else}}width:{{pct $v}}{{end}}"></i></span><span class="dim-val">{{conf $v}}</span></div>{{end}}
+    </div>
+    <div><h3>Drives</h3>
+      {{range $s.Drives}}<div class="dim"><span class="dim-name">{{title .Name}}</span><span class="dim-bar"><i style="width:{{pct .Value}}"></i></span><span class="dim-val">{{conf .Value}} <span class="muted">[{{conf .Min}}–{{conf .Max}}]</span></span></div>{{end}}
+    </div>
+  </div>
+  {{if .CanOperate}}<form method="post" action="/minds/{{$m.Slug}}/state/reset" class="row"><input type="hidden" name="_csrf" value="{{.CSRF}}"><button class="btn small" data-confirm="Reset drives and affect to their baselines?">Reset transient state</button></form>{{end}}
+</div>
+{{end}}