feat(me): include GitLab base URL in robot meta for URL construction

The `me` dashboard robot output now includes `meta.gitlab_base_url` so
consuming agents can construct clickable issue/MR links without needing
access to the lore config file. The pattern is:
  {gitlab_base_url}/{project}/-/issues/{iid}
  {gitlab_base_url}/{project}/-/merge_requests/{iid}

This uses the new RobotMeta::with_base_url() constructor. The base URL
is sourced from config.gitlab.base_url (already available in the me
command's execution context) and normalized to strip trailing slashes.

robot-docs updated to document the new meta field and URL construction
pattern for the me command's response schema.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/robot_docs.rs

@@ -382,7 +382,7 @@ fn handle_robot_docs(robot_mode: bool, brief: bool) -> Result<(), Box<dyn std::e
                     "mentioned_in": "[{entity_type:string, project:string, iid:int, title:string, state:string, attention_state:string, attention_reason:string, updated_at_iso:string, web_url:string?}]",
                     "activity": "[{timestamp_iso:string, event_type:string, entity_type:string, entity_iid:int, project:string, actor:string?, is_own:bool, summary:string, body_preview:string?}]"
                 },
-                "meta": {"elapsed_ms": "int"}
+                "meta": {"elapsed_ms": "int", "gitlab_base_url": "string (GitLab instance URL for constructing entity links: {base_url}/{project}/-/issues/{iid})"}
             },
             "fields_presets": {
                 "me_items_minimal": ["iid", "title", "attention_state", "attention_reason", "updated_at_iso"],
@@ -396,7 +396,8 @@ fn handle_robot_docs(robot_mode: bool, brief: bool) -> Result<(), Box<dyn std::e
                 "since_default": "1d for activity feed",
                 "issue_filter": "Only In Progress / In Review status issues shown",
                 "since_last_check": "Cursor-based inbox showing events since last run. Null on first run (no cursor yet). Groups events by entity (issue/MR). Sources: others' comments on your items, @mentions, assignment/review-request notes. Cursor auto-advances after each run. Use --reset-cursor to clear.",
-                "cursor_persistence": "Stored per user in ~/.local/share/lore/me_cursor_<username>.json. --project filters display only for since-last-check; cursor still advances for all projects for that user."
+                "cursor_persistence": "Stored per user in ~/.local/share/lore/me_cursor_<username>.json. --project filters display only for since-last-check; cursor still advances for all projects for that user.",
+                "url_construction": "Use meta.gitlab_base_url + project + entity_type + iid to build links: {gitlab_base_url}/{project}/-/{issues|merge_requests}/{iid}"
             }
         },
         "robot-docs": {

src/cli/commands/me/mod.rs

@@ -247,7 +247,7 @@ pub fn run_me(config: &Config, args: &MeArgs, robot_mode: bool) -> Result<()> {
 
     if robot_mode {
         let fields = args.fields.as_deref();
-        render_robot::print_me_json(&dashboard, elapsed_ms, fields)?;
+        render_robot::print_me_json(&dashboard, elapsed_ms, fields, &config.gitlab.base_url)?;
     } else if show_all {
         render_human::print_me_dashboard(&dashboard, single_project);
     } else {

src/cli/commands/me/render_robot.rs

@@ -15,11 +15,12 @@ pub fn print_me_json(
     dashboard: &MeDashboard,
     elapsed_ms: u64,
     fields: Option<&[String]>,
+    gitlab_base_url: &str,
 ) -> crate::core::error::Result<()> {
     let envelope = MeJsonEnvelope {
         ok: true,
         data: MeDataJson::from_dashboard(dashboard),
-        meta: RobotMeta { elapsed_ms },
+        meta: RobotMeta::with_base_url(elapsed_ms, gitlab_base_url),
     };
 
     let mut value = serde_json::to_value(&envelope)