* fix(server): render image paths with spaces
Raw spaces in local Markdown image destinations made the renderer treat provider images as text. Emit encoded file URIs for spaced paths so the client parses and resolves them as images.
* fix(server): encode all absolute image paths
Provider image paths without spaces could still contain URI-significant characters such as fragment or query markers. Route every absolute local path through the encoded file URI boundary.
* fix(server): encode network image paths
Windows network-share paths bypassed the absolute local path handling. Normalize UNC and extended UNC paths before encoding them as file URIs.
* fix(app): preserve network image paths
Host-based file URIs were decoded as relative paths. Restore the UNC prefix so provider images on network shares resolve through the file RPC correctly.
* fix(server): preserve double-slash POSIX image paths
Classify only backslash-prefixed paths as Windows network paths so POSIX double-leading-slash paths retain their filesystem semantics.
* fix(images): preserve Windows preview paths
Provider image markdown used escaped backslash paths on Windows, which markdown parsing could turn into encoded drive paths that the app treated as workspace-relative. Emit drive-letter paths as file URIs and normalize existing encoded local paths before file preview.
* test(server): accept file URI image sources
Windows provider image output now renders drive-letter paths as file URIs. Decode those markdown sources before filesystem assertions so the image rendering tests keep checking the materialized file.
* fix(images): keep plain local paths literal
Limit legacy URI decoding to markdown-encoded Windows drive paths so ordinary local paths with percent sequences remain unchanged. Document why provider image markdown matching still accepts old doubled-backslash history.
Windows daemon paths like C:\Users\... don't start with "/", breaking
the explorer sidebar, checkout status, terminals, and file attachments
when connected to a Windows daemon. Consolidate three private
isAbsolutePath implementations into a shared utility and use it
everywhere, with correct file URI conversion for Windows and UNC paths.
