Merge PR #116: land the open web UI and capability branches together

Author: elkaix

.changeset/derive-model-capabilities.md

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+---
+"@pymodel/pythinker-code": minor
+---
+
+Report each model's real capabilities in the catalog. Until now `capabilities` carried only what a user had typed into their config file by hand, so for almost every model it was empty. It is now derived from the model itself when the config says nothing, while an explicit list in the config still wins. A provider whose capabilities are genuinely unknown keeps omitting the field rather than claiming the model can do nothing.

.changeset/desktop-update-toast.md

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+---
+"@pymodel/pythinker-code": minor
+---
+
+Prompt for desktop updates with a toast that offers install or skip, centre the settings button in the sidebar footer, and start a new session when the sidebar brand is clicked.

.changeset/preserve-provider-ids.md

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+---
+"@pymodel/pythinker-code": patch
+---
+
+Keep provider and model ids exactly as written when a config patch is saved, so an id containing an underscore still resolves.

.changeset/session-capability-wiring.md

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+---
+"@pymodel/pythinker-code": minor
+---
+
+Make `agent_config.tools` and `agent_config.mcp_servers` reach the running agent. A session profile update now persists the selection, merges each field independently so supplying one half does not clear the other, resumes an inactive session before the mutation, and applies the result through a single `setActiveTools` call. MCP server names are turned into tool patterns with the shared naming helper, so a server whose name needs sanitizing still matches its tools.

.changeset/web-capability-menu-a11y.md

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+---
+"@pymodel/pythinker-code": patch
+---
+
+Fix web capability and retry controls: the capability panel takes keyboard focus when it opens, Retry stays reachable with Tab, rapid capability toggles reach the daemon in order, and retrying a prompt keeps its attachments.

.changeset/web-capability-menu.md

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+---
+"@pymodel/pythinker-code": minor
+---
+
+Add a capability menu to the composer. It picks which tools and MCP servers the current session may use, lists the session's skills, and turns plugins on or off. Each group states how far its change reaches, because the three differ: tool and MCP changes apply to this session at once, skills are read-only here, and plugin changes are global to the daemon. Selected tools and servers appear as chips beside the composer controls.

.changeset/web-composer-shell.md

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+---
+"@pymodel/pythinker-code": patch
+---
+
+Widen the chat reading column to 928px and restyle the composer card: a 24px radius, a translucent blurred surface, a border that strengthens on hover and focus, and an input that grows to 384px before it scrolls. The toolbar controls are 30px circles with a divider after the attachment button.

.changeset/web-empty-suggestions.md

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+---
+'@pymodel/pythinker-code': minor
+---
+
+Add starter suggestions to the empty conversation screen in the web UI. Each suggestion fills the composer for editing and does not send the message.

.changeset/web-message-actions.md

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+---
+'@pymodel/pythinker-code': minor
+---
+
+Add a Retry action to the last assistant reply and a copy button to user messages in the web UI. Retry asks for confirmation, then sends the original prompt again.

.changeset/web-model-badges.md

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+---
+"@pymodel/pythinker-code": patch
+---
+
+Show model capabilities as badges in the model picker instead of a comma-separated string, and bring its rows and search field onto the app's row metrics, sized from `--ui-font-size` so the font-size setting still scales them. A model that reasons adaptively is now distinguishable from one that exposes an explicit thinking capability, and an unrecognised capability still renders rather than being dropped.