telegram: fix parsing, add webpage reader, use gemini

- Fix Provider.hs to strip leading whitespace from OpenRouter responses
- Fix FunctionCall parser to handle missing 'arguments' field
- Use eitherDecode for better error messages on parse failures
- Switch to claude-sonnet-4.5 for main agent
- Use gemini-2.0-flash for conversation summarization (cheaper)
- Add read_webpage tool for fetching and summarizing URLs
- Add tagsoup to Haskell deps (unused, kept for future)

1 files changed, 1 insertions, 1 deletions

diff --git a/Omni/Agent/Telegram/Media.hs b/Omni/Agent/Telegram/Media.hs
index 1ef35de..137d7d3 100644
--- a/Omni/Agent/Telegram/Media.hs
+++ b/Omni/Agent/Telegram/Media.hs
@@ -239,7 +239,7 @@ analyzeImage apiKey imageBytes userPrompt = do
           else userPrompt <> "\n\n(describe objectively in third person, no first person pronouns)"
       body =
         Aeson.object
-          [ "model" .= ("anthropic/claude-sonnet-4" :: Text),
+          [ "model" .= ("anthropic/claude-sonnet-4.5" :: Text),
             "messages"
               .= [ Aeson.object
                      [ "role" .= ("user" :: Text),