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/pages/goals.html

@@ -0,0 +1,37 @@
+{{define "content"}}
+{{$m := .Data.Mind}}
+<div class="pagehead mindhead"><div><h1>{{$m.DisplayName}} <span class="muted small">goals</span></h1><p class="muted">{{range $k, $v := .Data.Stats.ByStatus}}<span class="badge gs-{{$k}}">{{$k}} {{$v}}</span> {{end}} Goals bias attention through goal relevance; they never grant capabilities.</p></div></div>
+{{template "mind_tabs" (dict "M" $m "Active" "goals")}}
+<section class="grid cols-3-1">
+  <div class="card">
+    {{if .Data.Goals}}
+    <table class="table compact">
+      <thead><tr><th>Goal</th><th>Kind</th><th>Status</th><th class="num">Priority</th><th>Progress</th><th>Owner</th><th>Progress at</th>{{if .Principal.User.Role.AtLeast "operator"}}<th></th>{{end}}</tr></thead>
+      <tbody>{{range .Data.Goals}}<tr>
+        <td>{{if .ParentID}}<span class="muted">↳ </span>{{end}}<strong>{{.Title}}</strong>{{if .Description}}<div class="small muted">{{.Description}}</div>{{end}}{{if .Blockers}}<div class="small danger">blocked: {{range .Blockers}}{{.}}; {{end}}</div>{{end}}{{if .OriginEvent}} <a class="small" href="/events/{{.OriginEvent}}">origin</a>{{end}}</td>
+        <td class="small">{{.Kind}}</td><td><span class="badge gs-{{.Status}}">{{.Status}}</span></td><td class="num">{{conf .Priority}}</td>
+        <td><span class="conf"><span class="conf-bar"><i style="width:{{pct .Progress}}"></i></span> {{pct .Progress}}</span></td><td class="small muted">{{.Owner}}</td><td class="small muted nowrap">{{ago .LastProgressAt}}</td>
+        {{if $.Principal.User.Role.AtLeast "operator"}}<td class="nowrap"><form method="post" action="/minds/{{$m.Slug}}/goals/{{.ID}}" class="inline"><input type="hidden" name="_csrf" value="{{$.CSRF}}">
+          <input type="number" name="progress" min="0" max="1" step="0.1" value="{{.Progress}}" size="3" aria-label="progress"><button class="btn small" name="action" value="progress">Set</button>
+          {{if ne .Status "completed"}}<button class="btn small" name="action" value="complete">Done</button>{{end}}{{if ne .Status "abandoned"}}<button class="btn small btn-danger" name="action" value="abandon" data-confirm="Abandon this goal?">Abandon</button>{{end}}</form></td>{{end}}
+      </tr>{{end}}</tbody>
+    </table>
+    {{else}}<p class="muted">No goals yet. Curiosity creates investigation goals from unexplained observations, prediction errors and contradictions; operators can set task goals here.</p>{{end}}
+  </div>
+  {{if .Principal.User.Role.AtLeast "operator"}}
+  <div class="card">
+    <h2>New goal</h2>
+    <form method="post" action="/minds/{{$m.Slug}}/goals" class="stack">
+      <input type="hidden" name="_csrf" value="{{.CSRF}}">
+      <label>Title <input name="title" required maxlength="300"></label>
+      <label>Description <textarea name="description" rows="2"></textarea></label>
+      <div class="grid cols-2 tight"><label>Kind <select name="kind"><option value="task">task</option><option value="investigation">investigation</option><option value="question">question</option><option value="maintenance">maintenance</option></select></label>
+      <label>Subject <input name="subject" placeholder="atlas" maxlength="80"></label></div>
+      <label class="slider"><span>Priority</span><input type="range" name="priority" min="0.1" max="1" step="0.1" value="0.5" data-out><output>0.5</output></label>
+      <label>Parent <select name="parent_id"><option value="">none</option>{{range .Data.Goals}}{{if eq .Status "active"}}<option value="{{.ID}}">{{trunc .Title 50}}</option>{{end}}{{end}}</select></label>
+      <div><button class="btn btn-primary" type="submit">Create</button></div>
+    </form>
+  </div>
+  {{end}}
+</section>
+{{end}}