fix(ssl): strip trailing slash in getBaseUrl + trust OS certificate store for HTTPS streaming

Fixes two bugs reported in #178:

- getBaseUrl() now strips trailing slashes from server URLs, consistent
  with restBaseFromUrl(). A trailing slash caused double-slash stream URLs
  (//rest/stream.view) which Caddy rejects. Trailing slash also caused
  browsing to return 0 results. Fix manually ported from PR #179 by kveld9.

- reqwest now loads the OS native certificate store in addition to
  Mozilla's webpki roots (rustls-tls-native-roots feature). Fixes HTTPS
  streaming failures where the server certificate is signed by a local CA
  (e.g. Caddy internal CA) that is trusted in the system keychain but not
  in Mozilla's root store.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/Cargo.lock

@@ -1991,6 +1991,7 @@ dependencies = [
  "hyper",
  "hyper-util",
  "rustls",
+ "rustls-native-certs",
  "tokio",
  "tokio-rustls",
  "tower-service",
@@ -3065,6 +3066,12 @@ dependencies = [
  "pathdiff",
 ]
 
+[[package]]
+name = "openssl-probe"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c87def4c32ab89d880effc9e097653c8da5d6ef28e6b539d313baaacfbafcbe"
+
 [[package]]
 name = "option-ext"
 version = "0.2.0"
@@ -3890,6 +3897,7 @@ dependencies = [
  "pin-project-lite",
  "quinn",
  "rustls",
+ "rustls-native-certs",
  "rustls-pki-types",
  "serde",
  "serde_json",
@@ -4070,6 +4078,18 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "rustls-native-certs"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "612460d5f7bea540c490b2b6395d8e34a953e52b491accd6c86c8164c5932a63"
+dependencies = [
+ "openssl-probe",
+ "rustls-pki-types",
+ "schannel",
+ "security-framework",
+]
+
 [[package]]
 name = "rustls-pki-types"
 version = "1.14.0"
@@ -4112,6 +4132,15 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "schannel"
+version = "0.1.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91c1b7e4904c873ef0710c1f407dde2e6287de2bebc1bbbf7d430bb7cbffd939"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "schemars"
 version = "0.8.22"
@@ -4169,6 +4198,29 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "security-framework"
+version = "3.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7f4bc775c73d9a02cde8bf7b2ec4c9d12743edf609006c7facc23998404cd1d"
+dependencies = [
+ "bitflags 2.11.0",
+ "core-foundation 0.10.1",
+ "core-foundation-sys",
+ "libc",
+ "security-framework-sys",
+]
+
+[[package]]
+name = "security-framework-sys"
+version = "2.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ce2691df843ecc5d231c0b14ece2acc3efb62c0a398c7e1d875f3983ce020e3"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
 [[package]]
 name = "selectors"
 version = "0.24.0"