ASCII output: inline `<i>`/`<b>` tags rendered literally; edges to subgraph IDs create phantom nodes

Thanks for the synchronous, zero-DOM ASCII renderer — using it via renderMermaidASCII(src, { colorMode: 'none' }). Two flowchart ASCII-output bugs on [email protected] (Node v24):

1. Inline formatting tags render literally

<br/> is handled (turned into a line break), but <i> / <b> / <em> / <strong> / … render as raw text:

Source:

flowchart TD
  A["italic <i>word</i> and bold <b>x</b>"]

Output:

┌──────────────────────────────────────┐
│                                      │
│ italic <i>word</i> and bold <b>x</b> │
│                                      │
└──────────────────────────────────────┘

Expected: the tags stripped (e.g. italic word and bold x), consistent with how <br/> is already handled.

2. Edges to a subgraph ID create phantom nodes

An edge whose endpoint is a subgraph (ONE --> TWO) spawns stray ONE / TWO boxes instead of connecting the two subgraph containers:

Source:

flowchart TD
  subgraph ONE["First"]
    A1["a"] --> A2["b"]
  end
  subgraph TWO["Second"]
    B1["c"] --> B2["d"]
  end
  ONE --> TWO

Output — the two subgraphs render correctly, but with disconnected ONE / TWO boxes off to the right:

┌───────┐ ┌───────┐          
│ First │ │Second │          
│       │ │       │          
│       │ │       │          
│ ┌───┐ │ │ ┌───┐ │   ┌─────┐
│ │   │ │ │ │   │ │   │     │
│ │ a │ │ │ │ c │ │   │ ONE │
│ │   │ │ │ │   │ │   │     │
│ └─┬─┘ │ │ └─┬─┘ │   └──┬──┘
│   │   │ │   │   │      │   
│   │   │ │   │   │      │   
│   │   │ │   │   │      │   
│   │   │ │   │   │      │   
│   ▼   │ │   ▼   │      ▼   
│ ┌───┐ │ │ ┌───┐ │   ┌─────┐
│ │   │ │ │ │   │ │   │     │
│ │ b │ │ │ │ d │ │   │ TWO │
│ │   │ │ │ │   │ │   │     │
│ └───┘ │ │ └───┘ │   └─────┘
│       │ │       │          
└───────┘ └───────┘          

This looks like the same class as the closed #55 ("subgraph relationships render broken") — it still reproduces on 1.1.3. Posting a minimal non-CJK repro, since #55 and #89 both use CJK characters (which could suggest a character-width cause); this shows the breakage isn't width-related. Mermaid itself routes such an edge to the subgraph boundary.

Environment: [email protected], renderMermaidASCII(src, { colorMode: 'none' }), Node v24.