feat(agent-term): complete tool-icon and fmtToolUse coverage

Several MCP tools appeared with the generic wrench icon (🔧) making
them hard to identify in the scrollback. fmtToolUse also lacked
specific formatters for some frequently-used tools, falling through
to fmtArgsGeneric.

Icons added:
- ack_until  → ✅  (mark-as-read semantics)
- get_logs   → 📜  (log viewer)
- get_host_journal → 📜  (journal reader)

fmtToolUse cases added:
- ack_until          → "ack_until* ≤N" (message-id bound)
- get_logs           → "get_logs* <agent> [NL]"
- get_host_journal   → "get_host_journal* <container|unit> [/grep/] [NL]"
- restart/start/update → "restart* <name>" etc. (previously used
                          fmtArgsGeneric; now match kill's pattern)

Closes #2188.

frontend/packages/agent/src/app.js

@@ -1514,6 +1514,7 @@ window.marked = marked;
       'mcp__hyperhive__set_status': '🏷️',
       'mcp__hyperhive__get_loose_ends': '🪢',
       'mcp__hyperhive__cancel_loose_end': '✂️',
+      'mcp__hyperhive__ack_until': '✅',
       'mcp__hyperhive__get_agent_meta': 'ℹ️',
       'mcp__hyperhive__request_next_turn': '⏩',
       'mcp__hyperhive__restart': '↻',
@@ -1521,6 +1522,8 @@ window.marked = marked;
       'mcp__hyperhive__start': '▶️',
       'mcp__hyperhive__update': '🔄',
       'mcp__hyperhive__list_containers': '📋',
+      'mcp__hyperhive__get_logs': '📜',
+      'mcp__hyperhive__get_host_journal': '📜',
       Read: '📖', Write: '💾', Edit: '✏️', Glob: '🔍', Grep: '🔍',
     };
     function toolIcon(name) {
@@ -1565,6 +1568,22 @@ window.marked = marked;
           return short + (parts.length ? ' ' + parts.join(' · ') : '()');
         }
         case 'mcp__hyperhive__kill':          return short + ' ' + (input.name || '');
+        case 'mcp__hyperhive__restart':       return short + ' ' + (input.name || '');
+        case 'mcp__hyperhive__start':         return short + ' ' + (input.name || '');
+        case 'mcp__hyperhive__update':        return short + ' ' + (input.name || '');
+        case 'mcp__hyperhive__ack_until':
+          return short + ' ≤' + (input.up_to != null ? input.up_to : '?');
+        case 'mcp__hyperhive__get_logs':
+          return short + ' ' + (input.agent || '?')
+            + (input.lines != null ? ' · ' + input.lines + 'L' : '');
+        case 'mcp__hyperhive__get_host_journal': {
+          const parts = [];
+          if (input.container) parts.push(input.container);
+          else if (input.unit) parts.push(input.unit);
+          if (input.grep) parts.push('/' + input.grep + '/');
+          if (input.lines != null) parts.push(input.lines + 'L');
+          return short + (parts.length ? ' ' + parts.join(' · ') : '()');
+        }
         case 'mcp__hyperhive__request_apply_commit':
           return short + ' ' + (input.agent || '') + ' @ ' + (input.commit_ref || '').slice(0, 12);
         case 'mcp__bash__run': {