docs: add installation reference to Lunatask skill fallbacks

Amolith created

Also simplify section formatting by replacing heading with horizontal
rule.

Assisted-by: Claude Opus 4.5 via Crush <crush@charm.land>

Change summary

skills/deferring-work-through-lunatask/SKILL.md | 4 ++--
skills/resuming-work-through-lunatask/SKILL.md  | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

Detailed changes

skills/deferring-work-through-lunatask/SKILL.md 🔗

@@ -73,6 +73,6 @@ Lunatask only supports full replacement, so reproduce the original note verbatim
 
 Use well-formed markdown with proper whitespace between sections.
 
-## CLI fallback
+---
 
-If `lunatask` or `lune` MCP tools are unavailable, see [cli.md](references/cli.md).
+If `lunatask` or `lune` MCP tools are unavailable, see [cli.md](references/cli.md). If the CLI is also unavailable, see [installing-lune.md](references/installing-lune.md).

skills/resuming-work-through-lunatask/SKILL.md 🔗

@@ -16,6 +16,6 @@ Treat the provided plan as **high-level suggestions only**. Before acting:
    - Summarize the deviations
    - Wait for user input before proceeding
 
-## CLI fallback
+---
 
-If `lunatask` or `lune` MCP tools are unavailable, see [cli.md](references/cli.md).
+If `lunatask` or `lune` MCP tools are unavailable, see [cli.md](references/cli.md). If the CLI is also unavailable, see [installing-lune.md](references/installing-lune.md).