feat(dashboard): Interventions page improvements and action-confirm modal

- Move Interventions under Workstreams in the navigator
- Add action-confirm.js: shared modal component for actions requiring a
  mandatory comment (survives live-poll re-renders, unlike inline DOM mutation)
- Wire action-confirm into Interventions (Mark done) and Decisions (Resolve)
- Fix Interventions completed section: fetch all tasks and filter client-side
  so resolved interventions (needs_human=false) still appear under Completed
- Add docs/interventions.md help page with ? button on the h1
- Replace all hardcoded "Bernd" with "human" across dashboard src and docs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

dashboard/src/interventions.md

@@ -8,13 +8,13 @@ const POLL = 15_000;
 ```
 
 ```js
-// Live poll: human-flagged tasks + workstreams + topics
+// Live poll: all tasks (filtered client-side) + workstreams + topics
 const interventionState = (async function*() {
   while (true) {
     let tasks = [], wsMap = {}, ok = false;
     try {
       const [rt, rw, rto, rr] = await Promise.all([
-        fetch(`${API}/tasks/?needs_human=true`),
+        fetch(`${API}/tasks/?limit=500`),
         fetch(`${API}/workstreams/`),
         fetch(`${API}/topics/`),
         fetch(`${API}/repos/`),
@@ -51,8 +51,10 @@ const _ts   = interventionState.ts;
 
 ```js
 const OPEN_STATUSES = new Set(["todo", "in_progress", "blocked"]);
-const open   = tasks.filter(t => OPEN_STATUSES.has(t.status));
-const closed = tasks.filter(t => !OPEN_STATUSES.has(t.status));
+// open  = currently flagged for human action
+// closed = previously flagged (intervention_note records the resolution comment)
+const open   = tasks.filter(t => t.needs_human === true);
+const closed = tasks.filter(t => t.intervention_note && !OPEN_STATUSES.has(t.status) && !t.needs_human);
 
 // Domain breakdown for top-3
 const domainCounts = {};
@@ -107,15 +109,20 @@ withDocHelp(_liveEl, "/docs/live-data");
 
 injectTocTop("intervention-kpi-box", _kpiBox);
 injectTocTop("live-indicator", _liveEl);
+
+const _h1 = document.querySelector("#observablehq-main h1");
+if (_h1) { _h1.style.position = "relative"; withDocHelp(_h1, "/docs/interventions"); }
 ```
 
-Tasks flagged `needs_human=true` — actions only Bernd can take.
+Tasks flagged `needs_human=true` — actions only a human can take.
 
 ---
 
 ## Open
 
 ```js
+import {openActionConfirm} from "./components/action-confirm.js";
+
 const PRIORITY_ORDER = {critical: 0, high: 1, medium: 2, low: 3};
 const STATUS_ORDER   = {blocked: 0, in_progress: 1, todo: 2};
 
@@ -127,26 +134,35 @@ function sortTasks(arr) {
   });
 }
 
-async function markDone(taskId) {
-  try {
-    await fetch(`${API}/tasks/${taskId}/`, {
-      method: "PATCH",
-      headers: {"Content-Type": "application/json"},
-      body: JSON.stringify({status: "done", needs_human: false, intervention_note: null}),
-    });
-  } catch {}
-}
-
 function renderCard(t) {
   const isOpen = OPEN_STATUSES.has(t.status);
   const borderColor = isOpen ? "#f59e0b" : "#22c55e";
+
+  function onMarkDone() {
+    openActionConfirm({
+      title:        "Mark Intervention as Done",
+      entityTitle:  t.title,
+      label:        "Resolution comment",
+      placeholder:  "What was done to resolve this?",
+      confirmLabel: "Mark Done",
+      onConfirm: async (comment) => {
+        const res = await fetch(`${API}/tasks/${t.id}/`, {
+          method: "PATCH",
+          headers: {"Content-Type": "application/json"},
+          body: JSON.stringify({status: "done", needs_human: false, intervention_note: comment}),
+        });
+        if (!res.ok) throw new Error(`API error ${res.status}`);
+      },
+    });
+  }
+
   return html`<div class="intervention-card" style="border-left-color:${borderColor}">
     <div class="int-card-header">
       <span class="task-badge task-priority-${t.priority}">${t.priority}</span>
       <span class="task-status-chip status-chip-${t.status}">${t.status.replace("_", " ")}</span>
       <span class="task-context">${t.domain}</span>
       <span class="task-context task-ws-name">${t.workstream_title}</span>
-      ${isOpen ? html`<button class="done-btn" onclick=${() => markDone(t.id)}>Mark done</button>` : ""}
+      ${isOpen ? html`<button class="done-btn" onclick=${onMarkDone}>Mark done</button>` : ""}
     </div>
     <div class="int-action">${t.intervention_note ?? "(no note)"}</div>
     ${t.title !== t.intervention_note ? html`<details class="int-desc"><summary>Task: ${t.title}</summary>${t.description ?? ""}</details>` : ""}