get_wiki_page: pageName should accept title or auto-convert to sub_url slug

[Lcstyle]

Problem

get_wiki_page returns 404 for wiki pages when the caller passes the page title (as displayed in list_wiki_pages output) instead of the sub_url slug.

Steps to reproduce

1. Create a wiki page with title architecture/signal-processing-strategies
2. Call list_wiki_pages — returns the page with title: "architecture/signal-processing-strategies" and sub_url: "architecture%2Fsignal-processing-strategies.-"
3. Call get_wiki_page(pageName="architecture/signal-processing-strategies") — 404
4. Call get_wiki_page(pageName="architecture%2Fsignal-processing-strategies.-") — 200 OK

Root cause

In tools/client_wiki.go, MyGetWikiPage constructs the URL as:

endpoint := fmt.Sprintf("/api/v1/repos/%s/%s/wiki/page/%s", owner, repo, pageName)

The pageName is passed through verbatim — no URL encoding, no slug transformation. But the Gitea API expects the sub_url slug at this endpoint, not the display title.

Impact

This makes get_wiki_page effectively unusable in MCP client workflows where the agent:

1. Lists pages via list_wiki_pages
2. Sees a title like architecture/foo
3. Naturally passes that title to get_wiki_page
4. Gets a 404

The agent has no way to know it needs the sub_url format unless it parses the raw API response (which the MCP tool abstracts away).

Suggested fixes (either would work)

Option A: Accept title, convert to slug internally

• In get_wiki_page, convert the input pageName to a slug using Gitea's NameToSubURL logic (URL-encode slashes, handle space↔hyphen conversion)
• This is the most user-friendly approach

Option B: Expose sub_url in list output and document the requirement

• When list_wiki_pages renders its markdown output, include the sub_url for each page
• Document that get_wiki_page requires sub_url, not title
• Less ideal since it requires the caller to always list first

Option C: Try both

• First try the pageName as-is
• If 404, URL-encode slashes and retry
• Graceful fallback

Environment

• Gitea 1.25.4
• forgejo-mcp v0.0.7
• MCP client: Claude Code