feat(brand): rebrand LLM-facing tool descriptions to Coven (#158)

* feat(brand): rebrand LLM-facing tool descriptions to Coven

Sweeps the ~5 remaining model-facing tool/skill descriptions that Phase 5
deliberately left (COVEN.md boundary was user-facing prose only): Config
and RemoteTrigger tool descriptions, the tool-search Config index entry,
and the update-config bundled skill (description + prompt-template body).

Internal paths (~/.coven-code/settings.json), code comments, test
fixtures, and debug logs are intentionally unchanged.

* fix(brand): rebrand share-export HTML title and footer to Coven

Phase 5 missed the self-contained share-export template: the exported
page title (' — Coven Code Session') and footer ('Generated by Coven
Code') still carried the old brand. User-facing HTML output.

agent.json ACP registration identity is intentionally left for a
separate, conscious decision.

Author: BunsDev

src-rust/crates/core/src/share_export/template.html

@@ -33,7 +33,7 @@
 
   <footer class="grid-section footer-row">
     <a class="footer-item" href="https://github.com/OpenCoven/coven-codes" target="_blank" rel="noopener">GitHub</a>
-    <div class="footer-item">Generated by Coven Code</div>
+    <div class="footer-item">Generated by Coven</div>
     <a class="footer-item" href="https://github.com/OpenCoven/coven-codes" target="_blank" rel="noopener">GitHub</a>
   </footer>
 </div>

src-rust/crates/core/src/share_export/template.js

@@ -36,7 +36,7 @@
   }
 
   var title = meta.title || ('Session ' + (meta.session_id || ''));
-  document.title = title + ' — Coven Code Session';
+  document.title = title + ' — Coven Session';
 
   var msgsEl = document.getElementById('messages');
 

src-rust/crates/tools/src/bundled_skills.rs

@@ -420,13 +420,13 @@ $ARGUMENTS"#,
     // -----------------------------------------------------------------------
     BundledSkill {
         name: "update-config",
-        description: "Configure Coven Code settings (hooks, permissions, env vars, behaviours) via settings.json.",
+        description: "Configure Coven settings (hooks, permissions, env vars, behaviours) via settings.json.",
         aliases: &["config-update", "settings"],
         when_to_use: Some("When the user wants to configure automated behaviours, permissions, or settings."),
         argument_hint: Some("<what to configure>"),
         prompt_template: r#"# Update Config Skill
 
-Modify Coven Code configuration by updating settings.json files.
+Modify Coven configuration by updating settings.json files.
 
 ## Settings File Locations
 

src-rust/crates/tools/src/config_tool.rs

@@ -37,7 +37,7 @@ impl Tool for ConfigTool {
     }
 
     fn description(&self) -> &str {
-        "Get or set Coven Code configuration settings. Omit 'value' to read the current value. \
+        "Get or set Coven configuration settings. Omit 'value' to read the current value. \
          Supported settings: model, max_tokens, verbose, permission_mode, auto_compact. \
          Changes persist to ~/.coven-code/settings.json."
     }

src-rust/crates/tools/src/remote_trigger.rs

@@ -28,7 +28,7 @@ impl Tool for RemoteTriggerTool {
     }
 
     fn description(&self) -> &str {
-        "Send a named event to another active Coven Code session. \
+        "Send a named event to another active Coven session. \
          Use this to coordinate across parallel sessions or notify a parent session of results."
     }
 

src-rust/crates/tools/src/tool_search.rs

@@ -196,7 +196,7 @@ static TOOL_CATALOG: &[ToolEntry] = &[
     },
     ToolEntry {
         name: "Config",
-        description: "Get or set Coven Code configuration",
+        description: "Get or set Coven configuration",
         keywords: &[
             "config",
             "settings",