heph.nvim: task views — next/list/capture/attention/state/log (slice 11b)

Backend: enrich `list` to return titled RankedTask rows (title +
canonical_context_id, via a shared ranked_from_row with `next`), so the
Organizational view needs no N+1 node.get. TDD: query_surface test asserts
list rows carry title + context id.

Plugin:
- view.lua: Tactical `next` + Organizational `list` rendered scratch buffers;
  <CR> opens the row's canonical-context doc. Narrowed the node autocmd to
  heph://node/* so view buffers (heph://next, heph://list) don't trip it.
- task.lua: capture, set-attention, done/drop, skip, per-task log append, all
  resolving "the current task" from the buffer (a task node, or a context doc
  via its canonical-context backlink).
- picker.lua: vim.ui.select with Telescope auto-upgrade (headless-safe).
- command.lua: :Heph next/list/capture/attention/done/drop/skip/log/search.

e2e: capture→next→open context→add/check checklist→done; recurring
fresh-checklist (complete rolls forward in place, next occurrence all-unchecked
— the §4.4 hard requirement). 6 specs green via `mise run test-nvim`.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/reference/heph-nvim.md

@@ -40,17 +40,28 @@ non-tombstoned alias-then-title match — the same mapping the store uses to
 materialize `wiki` links, so "follow link under cursor" jumps to the *same*
 node the stored link points at.
 
-## Commands (as of slice 11a)
+## Commands (as of slice 11b)
 
 | Command | Action |
 |---|---|
-| `:Heph today` | Open today's journal |
-| `:Heph journal <YYYY-MM-DD>` | Open a dated journal |
+| `:Heph today` / `:Heph journal <YYYY-MM-DD>` | Open today's / a dated journal |
 | `:Heph follow` (also `<CR>` in a node buffer) | Follow the `[[link]]` under the cursor |
 | `:Heph open <id>` | Open a node buffer by id |
+| `:Heph search <query>` | Full-text search; pick a result to open |
+| `:Heph next [scope]` | Tactical "what is next?" view (`<CR>` opens a task's context) |
+| `:Heph list [attention]` | Organizational survey of the outstanding set |
+| `:Heph capture <title>` | Capture a committed task (pick attention) |
+| `:Heph attention [color]` | Set the current task's attention |
+| `:Heph done` / `:Heph drop` / `:Heph skip` | State change on the current task |
+| `:Heph log <text>` | Append a breadcrumb to the current task's log |
 
-Task/agenda views (`:Heph next`/`list`/`capture`, set-attention, done/drop),
-the per-task log, and context-item **promotion** arrive in slices 11b/11c.
+"Current task" is resolved from the buffer: a `task` node, or a canonical-context
+doc whose owning task is followed via its `canonical-context` backlink. The
+`next`/`list` views render the titled rows the daemon returns (`list` enriched to
+carry titles + the context id, so no N+1 `node.get`). Pickers use built-in
+`vim.ui.select`, auto-upgrading to Telescope when installed.
+
+Context-item **promotion** (`:Heph promote`) and the CI runner arrive in slice 11c.
 
 ## Testing (tech-spec §9)