docs: scrub selection-bar #443/#596 cookies in tabs.js, add interaction-model preface (#712 batch 3)

selection + selection-bar in tabs.js carried six #443 cookies + two
#596 cookies — most marking the bulk-bar architectural decision
('actions live in bar, not on per-card buttons; manager not
special-cased') or the SW4RM-tab gate. All scrubbed; the canonical
docs/web-ui.md::Selection bar section already covered the bulk
actions in detail but was missing a preface for the **interaction
model** itself (how selection enters/exits, why per-card buttons
moved). Added that as the opening paragraph of the section so the
in-code refs have something to point at.

Net in this batch:
- tabs.js: -8 #NNN refs (#443 ×6, #596 ×2)
- docs/web-ui.md: +9 lines (interaction-model preface)
- functional code unchanged; build clean

refs #712

docs/web-ui.md

@@ -504,6 +504,15 @@ stops at the row's icon midline).
 
 ### Selection bar
 
+Per-card action buttons (`R3ST4RT` / `ST0P` / `ST4RT` / `R3BU1LD` /
+`DESTR0Y` / `PURG3`) used to live on each container row; the
+operator picked the bulk-bar model instead. Clicking an agent's
+icon toggles its selection (an in-memory `Set<name>`); `Esc` or
+the bar's `✕ clear` button drops everything. The selection
+persists across tab switches in-memory — the bar just hides on
+non-SW4RM tabs since other tabs don't show the agent cards needed
+to cross-reference.
+
 When one or more agents are selected (via icon click), a sticky
 frosted-mauve bar slides up from the bottom of the viewport
 (`#selection-bar`, `position: fixed; bottom: 0`). It shows:

frontend/packages/dashboard/src/tabs.js

@@ -287,11 +287,11 @@ window.marked = marked;
     if (s) renderContainers(s);
   }
 
-  // ─── selection (#443) ───────────────────────────────────────────────
+  // ─── selection ──────────────────────────────────────────────────────
-  // Set of selected agent logical names. Toggled by clicking the
+  // In-memory set of selected agent logical names backing the sticky
-  // container-row icon. When non-empty, the sticky #selection-bar
+  // #selection-bar. See docs/web-ui.md::Selection bar for the
-  // becomes visible with the bulk actions. Per-card action buttons
+  // interaction model (icon-click toggle, Esc/clear button drop,
-  // are gone — actions live in the bar.
+  // tab-gated visibility).
   const selectionState = new Set();
   function toggleSelection(name) {
     if (selectionState.has(name)) selectionState.delete(name);
@@ -534,7 +534,7 @@ window.marked = marked;
       // hyperhive mark (`/favicon.svg`, served by the dashboard
       // itself, always reachable). (issues #195, #202)
       const iconImg = el('img', { class: 'container-icon-img', alt: '' });
-      // #443: icon is the selection toggle. Click → add/remove from
+      // Icon is the selection toggle. Click → add/remove from
       // `selectionState` → re-render. role=button + tabindex makes it
       // keyboard-accessible; aria-pressed reflects the toggle state.
       const icon = el('div', {
@@ -698,10 +698,9 @@ window.marked = marked;
         ));
       }
 
-      // Per-card action buttons used to live here (R3ST4RT / ST0P /
+      // Per-card action buttons (R3ST4RT / ST0P / ST4RT / R3BU1LD /
-      // ST4RT / R3BU1LD / DESTR0Y / PURG3). Per mara on #443: "dont
+      // DESTR0Y / PURG3) moved to the selection bar — see
-      // show all the restart buttons etc., just show state and links.
+      // docs/web-ui.md::Selection bar. Actions
-      // instead, clicking an agent icon selects that agent." Actions
       // moved into the sticky #selection-bar (see renderSelectionBar)
       // which appears when the operator has at least one agent
       // selected via the icon click. The contextual `needs update ↻`
@@ -730,12 +729,13 @@ window.marked = marked;
     renderSelectionBar(containers);
   }
 
-  // ─── selection bar (#443) ───────────────────────────────────────────
+  // ─── selection bar ──────────────────────────────────────────────────
-  // Sticky-bottom strip; visible when ≥1 agent selected. mara picked
+  // Sticky-bottom strip; visible when ≥1 agent selected on the SW4RM
-  // option B: show every action button, disable the ones that don't
+  // tab. See docs/web-ui.md::Selection bar for the interaction model
-  // apply to the full selection, hover tooltip explains why. Actions
+  // and the per-action availability rules (disabled-with-tooltip for
-  // POST per agent in a loop (no new backend wire — endpoints already
+  // actions that don't apply to the full selection). Actions POST per
-  // exist and are individually idempotent / event-covered).
+  // agent in a loop (endpoints are individually idempotent /
+  // event-covered, so no new bulk backend wire is needed).
   function renderSelectionBar(containers) {
     const bar = $('selection-bar');
     if (!bar) return;
@@ -745,11 +745,9 @@ window.marked = marked;
     if (!countSpan || !namesSpan || !actions) return;
 
     const selected = containers.filter((c) => selectionState.has(c.name));
-    // #596: the bar's actions only make sense on the SW4RM tab — that's
+    // Tab-gate: bar only renders on SW4RM (the only tab with agent
-    // where the agent cards are visible to cross-reference against the
+    // cards to cross-reference). Selection state lives in-memory and
-    // selection. On other tabs the operator just sees a floating bar
+    // the bar reappears on return to SW4RM if still non-empty.
-    // with no context, so hide it. Selection state persists in-memory
-    // and the bar reappears on return to SW4RM if still non-empty.
     const onSwarmTab = (document.body.dataset.activeTab || 'swarm') === 'swarm';
     if (!selected.length || !onSwarmTab) {
       bar.hidden = true;
@@ -785,8 +783,8 @@ window.marked = marked;
       confirm: (names) => `restart ${names.length} agent${names.length === 1 ? '' : 's'} (${names.join(', ')})?`,
       disabledTitle: why('↺ R3ST4RT', stoppedNames.map((n) => `\`${n}\` is stopped`)),
     });
-    // #443 also lifts the manager-stop guard: when the whole selection
+    // ST0P does not special-case the manager: when the whole selection
-    // is running, ST0P applies — manager included. host-side hive-c0re
+    // is running it applies, manager included. host-side hive-c0re
     // keeps serving the dashboard either way + per-agent approvals +
     // meta-input updates still work without the manager up, so we
     // don't special-case the confirm prompt when the manager is in
@@ -844,7 +842,7 @@ window.marked = marked;
   // No client-side manager special-case (mara on #695): backend
   // `topology::set_parent` refuses to move the manager and surfaces the
   // refusal as a per-agent failure in the bulk-action error roll-up. Same
-  // pattern as #443 ST0P (which also doesn't special-case manager).
+  // pattern as ST0P (which also doesn't special-case manager).
   function addMoveActions(parent, selected, containers) {
     // M0V3 → ROOT: parent=null for every selected agent. Only meaningful
     // when at least one selected agent currently has a non-null parent;
@@ -3266,9 +3264,9 @@ window.marked = marked;
       if (tab) tab.classList.toggle('active', t === target);
       if (pane) pane.classList.toggle('tab-pane-active', t === target);
     }
-    // #596: track active tab on the body so renderSelectionBar can
+    // Track active tab on the body so renderSelectionBar can gate
-    // gate visibility (bar only belongs on SW4RM where agent cards
+    // visibility (bar only belongs on SW4RM where agent cards live).
-    // live). Re-render the bar so the toggle takes effect immediately
+    // Re-render the bar so the toggle takes effect immediately
     // on hashchange without waiting for the next SSE update.
     document.body.dataset.activeTab = target;
     renderSelectionBar(Array.from(containersState.values()));