telegram bot: refactor + multimedia + reply support

Refactor Telegram.hs into submodules to reduce file size:
- Types.hs: data types, JSON parsing
- Media.hs: file downloads, image/voice analysis
- Reminders.hs: reminder loop, user chat persistence

Multimedia improvements:
- Vision uses third-person to avoid LLM confusion
- Better message framing for embedded descriptions
- Size validation (10MB images, 20MB voice)
- MIME type validation for voice messages

New features:
- Reply support: bot sees context when users reply
- Web search: default 5->10, max 10->20 results
- Guardrails: duplicate tool limit 3->10 for research
- Timezone: todos parse/display in Eastern time (ET)

2 files changed, 21 insertions, 11 deletions

diff --git a/Omni/Agent/Tools/Todos.hs b/Omni/Agent/Tools/Todos.hs
index 4c7d2be..2aacacc 100644
--- a/Omni/Agent/Tools/Todos.hs
+++ b/Omni/Agent/Tools/Todos.hs
@@ -45,8 +45,8 @@ import Alpha
 import Data.Aeson ((.!=), (.:), (.:?), (.=))
 import qualified Data.Aeson as Aeson
 import qualified Data.Text as Text
-import Data.Time (NominalDiffTime, UTCTime, addUTCTime, getCurrentTime)
-import Data.Time.Format (defaultTimeLocale, parseTimeM)
+import Data.Time (LocalTime, NominalDiffTime, TimeZone, UTCTime, addUTCTime, getCurrentTime, localTimeToUTC, minutesToTimeZone, utcToLocalTime)
+import Data.Time.Format (defaultTimeLocale, formatTime, parseTimeM)
 import qualified Database.SQLite.Simple as SQL
 import qualified Omni.Agent.Engine as Engine
 import qualified Omni.Agent.Memory as Memory
@@ -165,12 +165,18 @@ migrateTodosTable conn = do
   unless ("last_reminded_at" `elem` colNames) <| do
     SQL.execute_ conn "ALTER TABLE todos ADD COLUMN last_reminded_at TIMESTAMP"
 
+easternTimeZone :: TimeZone
+easternTimeZone = minutesToTimeZone (-300)
+
 parseDueDate :: Text -> Maybe UTCTime
 parseDueDate txt =
   let s = Text.unpack txt
-   in parseTimeM True defaultTimeLocale "%Y-%m-%d %H:%M" s
-        <|> parseTimeM True defaultTimeLocale "%Y-%m-%d" s
-        <|> parseTimeM True defaultTimeLocale "%Y-%m-%dT%H:%M:%S" s
+      parseLocal :: Maybe LocalTime
+      parseLocal =
+        parseTimeM True defaultTimeLocale "%Y-%m-%d %H:%M" s
+          <|> parseTimeM True defaultTimeLocale "%Y-%m-%d" s
+          <|> parseTimeM True defaultTimeLocale "%Y-%m-%dT%H:%M:%S" s
+   in fmap (localTimeToUTC easternTimeZone) parseLocal
         <|> parseTimeM True defaultTimeLocale "%Y-%m-%dT%H:%M:%SZ" s
 
 createTodo :: Text -> Text -> Maybe Text -> IO Todo
@@ -301,7 +307,7 @@ todoAddTool uid =
                   "due_date"
                     .= Aeson.object
                       [ "type" .= ("string" :: Text),
-                        "description" .= ("Optional due date: 'YYYY-MM-DD' or 'YYYY-MM-DD HH:MM'" :: Text)
+                        "description" .= ("Optional due date in Eastern time: 'YYYY-MM-DD' or 'YYYY-MM-DD HH:MM'" :: Text)
                       ]
                 ],
             "required" .= (["title"] :: [Text])
@@ -316,7 +322,9 @@ executeTodoAdd uid v =
     Aeson.Success (args :: TodoAddArgs) -> do
       td <- createTodo uid (taTitle args) (taDueDate args)
       let dueDateMsg = case todoDueDate td of
-            Just d -> " (due: " <> tshow d <> ")"
+            Just d ->
+              let localTime = utcToLocalTime easternTimeZone d
+               in " (due: " <> Text.pack (formatTime defaultTimeLocale "%Y-%m-%d %H:%M ET" localTime) <> ")"
             Nothing -> ""
       pure
         ( Aeson.object
@@ -392,7 +400,9 @@ formatTodosForLLM todos =
     formatTodo td =
       let status = if todoCompleted td then "[x]" else "[ ]"
           dueStr = case todoDueDate td of
-            Just d -> " (due: " <> Text.pack (show d) <> ")"
+            Just d ->
+              let localTime = utcToLocalTime easternTimeZone d
+               in " (due: " <> Text.pack (formatTime defaultTimeLocale "%Y-%m-%d %H:%M ET" localTime) <> ")"
             Nothing -> ""
        in status <> " " <> todoTitle td <> dueStr <> " (id: " <> tshow (todoId td) <> ")"
 
diff --git a/Omni/Agent/Tools/WebSearch.hs b/Omni/Agent/Tools/WebSearch.hs
index f7250b8..58c945c 100644
--- a/Omni/Agent/Tools/WebSearch.hs
+++ b/Omni/Agent/Tools/WebSearch.hs
@@ -172,7 +172,7 @@ webSearchTool apiKey =
                   "limit"
                     .= Aeson.object
                       [ "type" .= ("integer" :: Text),
-                        "description" .= ("Max results to return (default: 5, max: 10)" :: Text)
+                        "description" .= ("Max results to return (default: 10, max: 20)" :: Text)
                       ]
                 ],
             "required" .= (["query"] :: [Text])
@@ -185,7 +185,7 @@ executeWebSearch apiKey v =
   case Aeson.fromJSON v of
     Aeson.Error e -> pure (Aeson.object ["error" .= Text.pack e])
     Aeson.Success (args :: WebSearchArgs) -> do
-      let lim = min 10 (max 1 (wsLimit args))
+      let lim = min 20 (max 1 (wsLimit args))
       result <- kagiSearch apiKey (wsQuery args) lim
       case result of
         Left err ->
@@ -209,4 +209,4 @@ instance Aeson.FromJSON WebSearchArgs where
   parseJSON =
     Aeson.withObject "WebSearchArgs" <| \v ->
       (WebSearchArgs </ (v Aeson..: "query"))
-        <*> (v Aeson..:? "limit" Aeson..!= 5)
+        <*> (v Aeson..:? "limit" Aeson..!= 10)