docs: unify casing and replace path-as-text links across recent doc surfaces

Sweep recent (last ~5h) doc edits for two readability/uniformity issues:

- Replace 42 path-as-text links of the form '[/foo/bar](/foo/bar)' with
  descriptive labels derived from each target page's frontmatter title
  (e.g. '[Anthropic]', '[Token use and costs]', '[OpenAI-compatible
  endpoints]'). Affected files include gateway/troubleshooting,
  concepts/oauth, reference/session-management-compaction, and
  reference/transcript-hygiene.
- Sentence-case Title-Cased headings and link text in Related sections
  across codex-harness, model-providers, tools/plugin, sdk-runtime,
  sdk-setup, prompt-caching, ci, cli/config, google-meet, browser,
  rich-output-protocol, subagents, web/control-ui, while preserving
  brand and proper-noun capitalization (OpenAI, Codex, Chrome, Parallels,
  Z.AI, etc.).

docs/reference/prompt-caching.md

@@ -338,9 +338,9 @@ Defaults:
 Related docs:
 
 - [Anthropic](/providers/anthropic)
-- [Token Use and Costs](/reference/token-use)
-- [Session Pruning](/concepts/session-pruning)
-- [Gateway Configuration Reference](/gateway/configuration-reference)
+- [Token use and costs](/reference/token-use)
+- [Session pruning](/concepts/session-pruning)
+- [Gateway configuration reference](/gateway/configuration-reference)
 
 ## Related
 

docs/reference/rich-output-protocol.md

@@ -39,7 +39,7 @@ Rules:
 - The web UI strips the shortcode from visible text and renders the embed inline.
 - `MEDIA:` is not an embed alias and should not be used for rich embed rendering.
 
-## Stored Rendering Shape
+## Stored rendering shape
 
 The normalized/stored assistant content block is a structured `canvas` item:
 

docs/reference/session-management-compaction.md

@@ -21,12 +21,12 @@ This document explains how OpenClaw manages sessions end-to-end:
 
 If you want a higher-level overview first, start with:
 
-- [/concepts/session](/concepts/session)
-- [/concepts/compaction](/concepts/compaction)
-- [/concepts/memory](/concepts/memory)
-- [/concepts/memory-search](/concepts/memory-search)
-- [/concepts/session-pruning](/concepts/session-pruning)
-- [/reference/transcript-hygiene](/reference/transcript-hygiene)
+- [Session management](/concepts/session)
+- [Compaction](/concepts/compaction)
+- [Memory overview](/concepts/memory)
+- [Memory search](/concepts/memory-search)
+- [Session pruning](/concepts/session-pruning)
+- [Transcript hygiene](/reference/transcript-hygiene)
 
 ---
 

docs/reference/transcript-hygiene.md

@@ -27,7 +27,7 @@ Scope includes:
 
 If you need transcript storage details, see:
 
-- [/reference/session-management-compaction](/reference/session-management-compaction)
+- [Session management deep dive](/reference/session-management-compaction)
 
 ---