fix calendar: table params for Lua functions + remove duplicate header

- CalendarPluginPage.svelte: removed <h2>pluginName — pageLabel</h2> (AppHeader already shows title)
- main.lua: all API functions now accept a single table parameter:
  - get_events(params) — reads params.start_date or params.start
  - get_event(params) — reads params.id
  - update_event(params) — reads params.id + mutable fields
  - delete_event(params) — reads params.id
  - get_expanded_events(params), get_calendar_events(params) — same
  - get_events_day(params) — reads params.date
  - create_event(opts) — already worked, no change
- Backward compatible: get_events accepts both start/start_date and end/end_date keys

contrib/plugins/calendar/main.lua

@@ -143,7 +143,9 @@ end
 --------------------------------------------------------------------------------
 
 -- Get events within a date range (inclusive)
-function M.get_events(start_date, end_date)
+function M.get_events(params)
+  local start_date = params.start_date or params.start
+  local end_date = params.end_date or params["end"] or params.end_date
   if not start_date then error("start_date required") end
   if not end_date then end_date = start_date end
   return verstak.db.query(
@@ -167,18 +169,23 @@ function M.get_events(start_date, end_date)
 end
 
 -- Get events for a specific day
-function M.get_events_day(date_str)
-  return M.get_events(date_str .. "T00:00:00", date_str .. "T23:59:59")
+function M.get_events_day(params)
+  local date_str = params.date or params
+  if type(date_str) ~= "string" then date_str = tostring(date_str) end
+  return M.get_events({ start_date = date_str .. "T00:00:00", end_date = date_str .. "T23:59:59" })
 end
 
 -- Get event by ID
-function M.get_event(id)
+function M.get_event(params)
+  local id = params.id or params
+  if not id then error("event id required") end
   return verstak.db.query_row(
     "SELECT * FROM events WHERE id = ?", id
   )
 end
 
 -- Create a single event (base event for recurrences)
+-- Already accepts a single table — no change needed
 function M.create_event(opts)
   opts = opts or {}
   if not opts.title or opts.title == "" then error("event title required") end
@@ -237,14 +244,14 @@ function M.create_event(opts)
 end
 
 -- Update an event (partial fields)
-function M.update_event(id, fields)
+function M.update_event(params)
+  local id = params.id
   if not id then error("event id required") end
   local old = verstak.db.query_row("SELECT * FROM events WHERE id = ?", id)
   if not old then error("event not found: " .. id) end
 
-  local updates = {}
-  local params = {}
   local set_clauses = {}
+  local sql_params = {}
 
   -- Build dynamic update
   local mutable = {
@@ -254,35 +261,36 @@ function M.update_event(id, fields)
     completed = true
   }
 
-  for k, v in pairs(fields) do
-    if mutable[k] then
+  for k, v in pairs(params) do
+    if k ~= "id" and mutable[k] then
       if k == "all_day" or k == "completed" then
         v = v and 1 or 0
       end
       table.insert(set_clauses, k .. " = ?")
-      table.insert(params, v)
+      table.insert(sql_params, v)
     end
   end
 
-  table.insert(params, now())
-  table.insert(params, id)
+  table.insert(sql_params, now())
+  table.insert(sql_params, id)
 
   if #set_clauses > 0 then
     verstak.db.exec(
       "UPDATE events SET " .. table.concat(set_clauses, ", ") .. ", updated_at = ? WHERE id = ?",
-      unpack(params)
+      unpack(sql_params)
     )
   end
 
   safe_log(verstak.activity.log,"event_updated",
-    "Событие обновлено: " .. (fields.title or old.title or id), id, old.node_id or "")
+    "Событие обновлено: " .. (params.title or old.title or id), id, old.node_id or "")
 
   return true
 end
 
 -- Delete an event
-function M.delete_event(id)
-  if not id then error("event id required") end
+function M.delete_event(params)
+  local id = params.id or params
+  if not id or type(id) ~= "string" then error("event id required") end
   local old = verstak.db.query_row("SELECT title, node_id FROM events WHERE id = ?", id)
   if not old then return true end
 
@@ -423,7 +431,9 @@ end
 M.expand_recurring = expand_recurring
 
 -- Get all events (flat + expanded) for a range — used by the panel
-function M.get_expanded_events(start_date, end_date)
+function M.get_expanded_events(params)
+  local start_date = params.start_date or params.start
+  local end_date = params.end_date or params["end"]
   local base_events = verstak.db.query(
     [[SELECT * FROM events WHERE recurring_rule IS NOT NULL AND recurring_rule != ''
       AND completed = 0]]
@@ -454,11 +464,11 @@ function M.get_expanded_events(start_date, end_date)
 end
 
 -- Get all events (flat + expanded) for a range — used by the panel
-function M.get_calendar_events(start_date, end_date)
+function M.get_calendar_events(params)
   -- 1. Normal events
-  local normal = M.get_events(start_date, end_date)
+  local normal = M.get_events(params)
   -- 2. Expanded recurring
-  local recur = M.get_expanded_events(start_date, end_date)
+  local recur = M.get_expanded_events(params)
   -- Merge
   local all = {}
   for _, e in ipairs(normal) do table.insert(all, e) end