docs: text objects, motions, debug mode, queue view rename

Problem: vimdoc had no documentation for the new text objects, motions,
debug config, or the pending://queue buffer rename.

Solution: add text object and motion tables to the mappings section,
document all eight <Plug> mappings, add debug field to the config
reference, update config example with new keymap defaults, rename
priority view references to queue throughout the vimdoc.

doc/pending.txt

@@ -34,7 +34,7 @@ Features: ~
 - Relative date input: `today`, `tomorrow`, `+Nd`, `+Nw`, `+Nm`, weekday
   names, month names, ordinals, and more
 - Recurring tasks with automatic next-date spawning on completion
-- Two views: category (default) and priority flat list
+- Two views: category (default) and queue (priority-sorted flat list)
 - Multi-level undo (up to 20 `:w` saves, persisted across sessions)
 - Quick-add from the command line with `:Pending add`
 - Quickfix list of overdue/due-today tasks via `:Pending due`
@@ -278,13 +278,41 @@ Default buffer-local keys: ~
     `<CR>`        Toggle complete / uncomplete (`toggle`)
     `!`           Toggle the priority flag (`priority`)
     `D`           Prompt for a due date (`date`)
-    `<Tab>`       Switch between category / priority view (`view`)
+    `<Tab>`       Switch between category / queue view (`view`)
     `U`           Undo the last `:w` save (`undo`)
     `o`           Insert a new task line below (`open_line`)
     `O`           Insert a new task line above (`open_line_above`)
     `zc`          Fold the current category section (category view only)
     `zo`          Unfold the current category section (category view only)
 
+Text objects (operator-pending and visual): ~
+
+    Key         Action ~
+    -------     ------------------------------------------------
+    `at`          Select the current task line (`a_task`)
+    `it`          Select the task description only (`i_task`)
+    `aC`          Select a category: header + tasks + blanks (`a_category`)
+    `iC`          Select inner category: tasks only (`i_category`)
+
+`at` supports count: `d3at` deletes three consecutive tasks. `it` selects
+the description text between the checkbox prefix and trailing metadata
+tokens (`due:`, `cat:`, `rec:`), making `cit` the natural way to retype a
+task description without touching its metadata.
+
+`aC` and `iC` are no-ops in the queue view (no headers to delimit).
+
+Motions (normal, visual, operator-pending): ~
+
+    Key         Action ~
+    -------     ------------------------------------------------
+    `]]`          Jump to the next category header (`next_header`)
+    `[[`          Jump to the previous category header (`prev_header`)
+    `]t`          Jump to the next task line (`next_task`)
+    `[t`          Jump to the previous task line (`prev_task`)
+
+All motions support count: `3]]` jumps three headers forward. `]]` and
+`[[` are no-ops in the queue view. `]t` and `[t` work in both views.
+
 `dd`, `p`, `P`, and `:w` work as standard Vim operations.
 
                                                         *<Plug>(pending-open)*
@@ -323,6 +351,38 @@ Default buffer-local keys: ~
 <Plug>(pending-open-line-above)
     Insert a correctly-formatted blank task line above the cursor.
 
+                                                    *<Plug>(pending-a-task)*
+<Plug>(pending-a-task)
+    Select the current task line (linewise). Supports count.
+
+                                                    *<Plug>(pending-i-task)*
+<Plug>(pending-i-task)
+    Select the task description text (characterwise).
+
+                                                *<Plug>(pending-a-category)*
+<Plug>(pending-a-category)
+    Select a full category section: header, tasks, and surrounding blanks.
+
+                                                *<Plug>(pending-i-category)*
+<Plug>(pending-i-category)
+    Select tasks within a category, excluding the header and blanks.
+
+                                                 *<Plug>(pending-next-header)*
+<Plug>(pending-next-header)
+    Jump to the next category header. Supports count.
+
+                                                 *<Plug>(pending-prev-header)*
+<Plug>(pending-prev-header)
+    Jump to the previous category header. Supports count.
+
+                                                   *<Plug>(pending-next-task)*
+<Plug>(pending-next-task)
+    Jump to the next task line, skipping headers and blanks.
+
+                                                   *<Plug>(pending-prev-task)*
+<Plug>(pending-prev-task)
+    Jump to the previous task line, skipping headers and blanks.
+
 Example configuration: >lua
     vim.keymap.set('n', '<leader>t', '<Plug>(pending-open)')
     vim.keymap.set('n', '<leader>T', '<Plug>(pending-toggle)')
@@ -341,12 +401,12 @@ Category view (default): ~                             *pending-view-category*
     first within each group. Category sections are foldable with `zc` and
     `zo`.
 
-Priority view: ~                                       *pending-view-priority*
+Queue view: ~                                             *pending-view-queue*
     A flat list of all tasks sorted by priority, then by due date (tasks
     without a due date sort last), then by internal order. Done tasks appear
     after all pending tasks. Category names are shown as right-aligned virtual
     text alongside the due date virtual text so tasks remain identifiable
-    across categories.
+    across categories. The buffer is named `pending://queue`.
 
 ==============================================================================
 CONFIGURATION                                                *pending-config*
@@ -371,6 +431,14 @@ loads: >lua
         undo = 'U',
         open_line = 'o',
         open_line_above = 'O',
+        a_task = 'at',
+        i_task = 'it',
+        a_category = 'aC',
+        i_category = 'iC',
+        next_header = ']]',
+        prev_header = '[[',
+        next_task = ']t',
+        prev_task = '[t',
       },
       gcal = {
         calendar = 'Tasks',
@@ -429,6 +497,17 @@ Fields: ~
                          See |pending-mappings| for the full list of actions
                          and their default keys.
 
+    {debug}              (boolean, default: false)
+                         Enable diagnostic logging. When `true`, textobj
+                         motions, mapping registration, and cursor jumps
+                         emit messages at `vim.log.levels.DEBUG`. Use
+                         |:messages| to inspect the output. Useful for
+                         diagnosing keymap conflicts (e.g. `]t` colliding
+                         with Neovim defaults) or motion misbehavior.
+                         Example: >lua
+                             vim.g.pending = { debug = true }
+<
+
     {gcal}               (table, default: nil)
                          Google Calendar sync configuration. See
                          |pending.GcalConfig|. Omit this field entirely to